Related
Being a newbie and only having an XDA1 I keep hearing the words GPRS and GSM banded about. Can someone plse tell me the differences between the two>???
Thanks john
GPRS is short for General Packet Radio Service, a standard for wireless communications which runs at speeds up to 115 kilobits per second,
GSM (Global System for Mobile Communications) 9.6 kilobits. so 11 times slower
GSM is mostly used for voice calls and SMS
GPRS for DATA-transfer ie MMS,surfing,email,...
GSM is usually charged by time ie minutes/second
GPRS by amount of data ie KiloBytes,Megabytes
You can surf or check email with GSM but then you'll have to use your GSM as a modem with a dial-in connection.
That's what i think, maybe I'm wrong but I'm sure the experts will correct me.
M4io said:
GPRS is short for General Packet Radio Service, a standard for wireless communications which runs at speeds up to 115 kilobits per second,
GSM (Global System for Mobile Communications) 9.6 kilobits. so 11 times slower
GSM is mostly used for voice calls and SMS
GPRS for DATA-transfer ie MMS,surfing,email,...
GSM is usually charged by time ie minutes/second
GPRS by amount of data ie KiloBytes,Megabytes
You can surf or check email with GSM but then you'll have to use your GSM as a modem with a dial-in connection.
That's what i think, maybe I'm wrong but I'm sure the experts will correct me.
Click to expand...
Click to collapse
You are right.
GPRS is a data transfer protocol which runs OVER the GSM network. GPRS is a digital based protocol which is why high speeds can be achieved compared to GSM.
GPRS & GSM
Yep. generally speaking.........
Both can be used to surf the net (WWW) but generally GPRS is cheaper and faster.
GSM will dial up a server for your email and surfing. Your calls over GSM to a server generally cost 10 pence per minute, although it can be free depending on your personal tariff with your network (O2, Orange, Vodaphone, T Mobile, 3....)
GPRS is connected by your service provider, and you pay for what you download, by the KB, prices range fron £1 a megabyte to £7 depending on the supplier.
Coverage varies from mobile to mobile and area to area and of course network to network, for both GPRS & GSM.
Hi
For the networks, supporting GPRS meant a relatively simple firmware update to all but the oldest base stations. GPRS is pretty crude, if offers higher data rates at the expense of network capacity and makes poor use of the available spectrum (compared to W-CDMA G3 modulation schemes).
A basestation will have available to it a number of standard frequencies for GSM comms, say 50 channels, these channels will be different to the channels used on the neighboring base stations.
Each of these channels is split up into 8 time slots. In a GSM config, a mobile gets 1 timeslot, so 8 calls can take place 'at the same time' on the same channel. The base station and mobiles decide who is gonna transmit and when. This happens so fast that as far as the user is concerned they have a comms channel to themselves. This is TDMA Time Domain, Multiple Access.
Interestingly the time slots are so narrow that if you have phone A on located 20KM from the base station on timeslot 8, and phone B next to the base station on timeslot 2, then phone A will transmit its data before phone B, with the data arriving at the base station in correct time-slot order!
Mobile networks also support time-slot and channel hopping to get around network interference problems, and more importantly to counteract the issues of dopler shift when the mobile is moving at speed.
GPRS works simply by making more of these timeslots available to a single mobile. The fact that data is bursty means that the base station can hand out timeslots fairly efficiently. The 2 current systems for GPRS are class 8 and class 10
Class 8 offers 4 download timeslots and 1 upload timeslot
Class 10 offers 3 download timeslot and 2 upload timeslots
Each slot offers from 9.6K to 21.4K depending on network configuration (basically thats the width the RF channel, perhaps also the no of slots that the channel is split into - cant remember). In the UK I beleieve that each timeslot runs at 14.4K. You will however not see that since some of it is used for error correction.
O2 defaults to class 10. I dont know whether this is locked at the network level and I never tried changing it.
Class 10 will hence give max 43.2K down / 28800 up and
class 8 is 57.6K down, 14.4K up
You can knock 20% of those figures for error correction duties.
It would be possible for GPRS to run in 7/1 mode to give 7x14K4 = 100.8K down / 14.4K up. I dont think any networks or devices support such a configuration though!
Its been a while since I worked in this field so this info may be out of date by now. GPRS is not that much faster than HSCSD (high speed circuit switched data), but its much more efficient in its use of the bandwidth.
Ever been up a mountain miles from nowhere, had a screen full of signal bars but never managed to make a call?? Its a limitation of GSM (or rather the config of the network). A phone must be able to respond within the correct timeslot, if the phone is too far away then it can miss its slot altogether, hence full bars, but no calling! In the UK, the network setup means that the limit is around 25KM, in australia, they have extended this to around 100KM in rural locations.
Roll on EDGE - 2.5G++ its a new modulation scheme for GSM that makes *much much* better use of the spectrum. Should give us 256K on the move - i.e it will be pushing into 3G terratory bandwidth wise. Trouble is, GPRS was a firmware update for most base stations, EDGE is gonna require hardware. I would not be surprised though if we did not see networks giving up on taking 3G coverage beyond 70-80% of population, and rely on EDGE/GPRS to cover the dregs.
Nigel
Is there a way I can still get my GSM calls when I am connected to GPRS ?
As a matter of fact I do when the GPRS is Idle. But when there is some data transfer happening and a call comes in, It goes off to my voice mail !!!
Isn't it supposed to put the GPRS on hold and take the call ?
Any settings or any ideas ?
regards,
Arun
Hello everybody!
I know this looks like it belongs in the networking forum, but I'd like an answer specific to the Jamin.
The problem is this:
If I am downloading a page with IE it blocks incoming calls. If the GPRS connection is active but no data is transferring calls go through.
I found an old thread on this and it seems to be a phone specific problem (some models do this and others don't).
So am I missing something?
Is this a ROM / hardware thing, or is there a setting some ware, or maybe this is dependent on the cellular provider?
Does anyone else here experience this? Please let me know and if my question is stupid don't hesitate to point it out.
P.S. I am using latest official i-mate ROM 2.13.9.23 WWE and 1_02.20.21 radio.
Sounds quite strange, if I remember well and from experience in low-coverage areas the GPRS signal is dropped first if calls are made on the handset and there is not enough bandwith for both. But I am sure we find a GSM network expert here that can enlighten us. Interesting question.
Hi,
I have aone xda Atom.
Have the same problem.
For example media player streaming internet radio , phone calls don´t came through. Or 1 in 10 came through.
If I´m connect without streaming or downloading then the call came through
Regards
Josef
As far as i remember you can't recieve any calls exactly when downloading. When GPRS is simply on it's ok. Don't really remember why...
As far as i remember you can't recieve any calls exactly when downloading. When GPRS is simply on it's ok. Don't really remember why...
The phone and GPRS are mutually exclusive.
We have a GPRS application that needs the connection to be alive as much as possible to receive incoming data. Phone calls get in the way of this, which is why I know the problem exists.
I do not have a validated reason for the problem (I believe they use the same transmission streams over the network, which means the network needs to know whether it is transmitting data or voice. Data needs to be reliable, with no dropped packets, while voice needs to be quick, with dropped packets being ignored, or something similar anyway).
Graham.
Hi,
Will like to add. Have one Universal too.
With the Universal if I ´m downloading or listen internet radio, when a call cames the downloading is suspend. Allways.
Regards
JoseF
Seems like it depends on service provider not on the device... I remembere the time when GPRS have just been started on NW Megafone - GPRS traffic lived like poor homie with the voice transmissions so when many peoples speaks - gprs is dead. Nowdays we got edge and gprs works fine. But still we got subj
Well, at least now I know it's not a matter of settings or ROM version.
Still not sure if it's the phone or the provider, but since I don't fell like switching either of them (specially the phone ) I guess I'll have to live with it.
Just to clarify: I don't expect simultaneous voice and data, but it would have been nice if incoming calls killed GPRS to get through even if I am in the middle of a download.
P.S.
Thanks every one for your prompt responses!
Not much help, but this is among the reasons I use a multicard - maybe you want to consider it. A multicard is two SIM cards with the same number, but one card is activated for GPRS/UMTS and SMS, and the other one for voice traffic and SMS. Especially with a flat data rate, GPRS is always on, and one does not have to use the Prophet as a phone all day. It means you have to carry two phones, but for a heavy user working with these tools all day it makes perfect sense. Just my five cents...
Just to clarify: I don't expect simultaneous voice and data, but it would have been nice if incoming calls killed GPRS to get through even if I am in the middle of a download.
Click to expand...
Click to collapse
Hm... Let me think... I remember there was such a nice setting on my Panasonic GD87, called "Wait for incoming call" or smt like this. Nice feature. Gives the ability of cellular phone disconnect from gprs and recive incoming call. Seems like I'll be missing it
Are there any news on this?
I have the same problem, that incoming calls are blocked when using GPRS.
Hi yoda_143.
I recently got to do some testing at work with phones from different manufacturers (MIO, HP, ASUS) and my SIM.
The conclusion: It is not the Jamin!
On all phones incoming call was blocked while data was transferred.
I haven't had the chance to test it with different providers, but I suspect this will not make a difference.
It would be nice though if there was a way to give voice calls priority even if it meant starting the download over from the beginning after the call ends.
Guys this might help
http://www.gsmworld.com/technology/gprs/class.shtml
Class A, Class B & Class C?
The class indicates the mobile phone capabilities.
Class A
Class A mobile phones can be connected to both GPRS and GSM services simultaneously.
Class B
Class B mobile phones can be attached to both GPRS and GSM services, using one service at a time. Class B enables making or receiving a voice call, or sending/receiving an SMS during a GPRS connection. During voice calls or SMS, GPRS services are suspended and then resumed automatically after the call or SMS session has ended.
Class C
Class C mobile phones are attached to either GPRS or GSM voice service. You need to switch manually between services.
BUT; even my Wizard claims that it's Class B, does the same thing and blocks incoming calls while downloading. So what does it mean?? Maybe a network provider issue :?:
From my use of XDA2i it appeared that phone can transfer GPRS data or phone call not both at the same time.
If you want both then you will need 3G/UMST
The Universal will happily allow phone calls whilst surfing over a 3G connection. Even on Universal you lose the ability for data&phone if you are using GPRS.
I see but it says everywhere that Class B phones has to stop data transfer and accept incoming calls. My old Sonyericsson T630 was doing the job! BTW my network provider claims in their website FAQ like this..
Q- During download with GPRS, if an incoming call occurs, do my GPRS connection stops?
A- During download with GPRS, if an incoming call occurs, you can easily accept the call. During call, your data transfer suspends and after call ends, goes on where it was suspended.
EDIT: I talked with network operator today and they changed their web site saying after a few tests that "u can't suspend and resume GPRS data flow, while data flow incoming calls are blocked!!"
While Wizard is Class B and the operator uses NOMII , all architectural must be wrong.
Really WEIRD, isn't it?
This article is also interesting (don't look "symbian" thing, it is a general article about GPRS/NOM)
http://www.symbian.com/symbianos/standards/symbianongprs.html
Network operation mode and phone classes
The Network Operation Mode, or NOM, is responsible for the capabilities of a GPRS network, while the class indicates the mobile phone capabilities. On NOM 1 networks, mobile phones with the right capabilities can have simultaneous circuit- and packet-switched connections. On NOM 2 networks, mobile phones can remain attached to the GPRS networks when in a voice call but they can't transmit data at the same time. On NOM 3 networks, mobile phones can either establish a packet-switched data connection or a circuit-switched voice one but they need to disconnect from one to establish another.
Class A phones can make full use of NOM 1 networks: they can use circuit-switched voice and GPRS data services at the same time. Class B phones can register circuit-switched voice and packet-switched data services at the same time but may only use one at a time. Should the user receive a call while on the internet, they can take the call and GPRS service will be suspended, resuming once the voice call is ended. Resuming GPRS service is much faster than re-establishing a data call. Class C phones can only register for packet-switched data or for circuit-switched voice services; if the user chooses GPRS, then they will be totally unavailable for GSM calls and reciprocally.
End-users will initially have access to Class B mobile phones, which are able to make and receive calls while simultaneously being registered with GPRS services - GPRS services will automatically be suspended and resumed at the end of the call. Class B phones only support one active service at a time - GSM (voice, fax or data) or GPRS (data) - though both services can be registered with the network and the phone can switch automatically back and forth. However, should the user roam to a network area that is NOM III, their Class B phone will effectively be working as a Class C phone.
New applications designed to run in an online environment will be developed to take advantage of GPRS and 3G networks. The user may well experience a 'blurring' of applications whereby they won't need to switch task nearly at all.
my universal (t-mobile) on 3g in australia is quite fine i tested the situation you guys are talking about and itl mmove he program to background and take the call (both do run simultaniously (internet might slow down alittle by about 3 Kb/s so hope this helps someone... byebye (GREAAT WEBSITE!)
Hi, anyone tried connecting to 3G in a non 3G coverage area and the connection automatically switch itself to GPRS instead of EDGE, even if EDGE is available in that area? I wanted to connect my device to EDGE if 3G is not available and not to GPRS. Pls advice... Cheers!
Hey,
The way mobile networks and handsets work is the phone will always choose the highest available connection speed possible and the network based on capacity and available resource will assign the mobile what it can. That's why a phone will always look for a 3G network before a GSM one. When the phone initiates a packet connection to the network it includes a message which tells the network it's capability such as EDGE supported, what class of GPRS capability (4 slots down / 2 up etc...) and then the network based on this message assigns the phone a resource. Most networks nowadays have enough resource to give you a fairly good connection. For example if you support EDGE you will be given EDGE assignment (8QPSK instead of 4GMSK) as the ways the data is scheduled in the network is no different between GPRS and EDGE only the connection between the handset and network is faster.
What actually happens when you change from 3G to GPRS/EDGE is you drop the connection in 3G (move out of coverage) and based on the neighbouring channel list you received off the 3G cell you look for the most suitable GSM cell. Now this cell may or may not support EDGE but in either case the handset will PRACH on the cell, the cell with then ask the handset to authenticate and in this message you send your handset capability and also information about the last RNC/PCU (in this case the one connected to the 3G cell) you were on. The new PCU then signals with your old one and re-routes the data in the backbone of the network to you on your new cell. There will be data loss but the higher layers (application) should ask for re-tries for the missing data if it's TCP data.
In summary your connection priority (if the network supports all these technologies) is: HSDPA > UMTS (3G) > EDGE > GPRS > HSCSD > CSD
Hopefully this answers you question and adds a bit of extra info...
EDIT:
P.S. Not many networks support EDGE at present but most have plans to support it in the next 12-24 months.
Gav
How do you know you are on GPRS and not EDGE??
Hi Eeter,
I don't think there is any indication on the device You could tell my doing a speed test. If you are on a GSM network where you know EDGE is used then more than likely you will be using it instead of GPRS.
Gav.
There is an easy way:
1. Install the fieldtest utility
2. Go into a data session ( streaming radio ....BBC or others )
3. Check the Fiedtest EGPRS page and look for the downling coding
4. If it shows a CS1 or CS2 it is GPRS. If it shows MCS5 etc.. It is EDGE
Checking speed only is misleading. EDGE can be slow sometimes and the speed depends not only on the air interface but on the core internet side too
Hi eeter,
Yeah I agree that a speed test could be miss-leading.
Checking if you are using a MCS instead of CS will say for sure you have an EGPRS connection.
Gav.
Hey guys, I am not sure if I am missing something in the settings or what, but for some reason, when i am talking on the phone I cannot connect to the internet. My HSDPA connection turns off. Once I hang up, it reconnects. I thought the X1 was capable of doing simultaneous voice and data connects. What causes this? And is there a way to enable both voice and data connects at the same time? Thanks!
boy I explain this a lot
simultaneous voice and data have been available since the first gprs phone
it was the reason gprs was invented rather then dialup data over gsm
but if the operators hardware in the centrals don't support it no phone or setting
can change that
i'be been doing in on my old himalaya gprs phone for ages
and now on my x1 never had any problems
Well, I can do it on my old 3G phone, but not on my X1a. AT&T has allowed this for years, I know that. I just want to know if there is a way I might have accidentally turned it off or something.
Mine won't do it either. My Xperia kicks on the Wifi and continues PUSH email delivery through when ever I have the phone in use. BUT, my blackberry and iPhone would both not allow voice and data at once. It may have to do with T-mobile's settings where I am though.
I have the same issue with T-MO network.
you mean like talking on the phone and continuing surfing the net?
leobox1 said:
you mean like talking on the phone and continuing surfing the net?
Click to expand...
Click to collapse
Exactly. My internet gets "put on hold" for the duration of the phone call.
I face this when i have a GPRS/EDGE coverage, but when connected to 3G/3.5G/H it's ok, i can make both without problems
anaadoul said:
I face this when i have a GPRS/EDGE coverage, but when connected to 3G/3.5G/H it's ok, i can make both without problems
Click to expand...
Click to collapse
I would like to expand this...
anaadoul is correct. In fact, regular GPRS cannot send data simultaneously as the voice call.
EDGE can SOMETIMES do so if the carrier's tower/cell supports this, but not all do, so while EDGE provides faster data connection, you may or may NOT get simultaneous data and voice. This is my experience at least. I think EDGE is always supposed to support simultaneous voice/data but my experience shows otherwise.
This is one of the primary reasons I am using a 3G network and 3G phone now. 3.5G/H while providing faster data, have no difference in regards to simultaneous voice data, but do use more power/battery so if I know I'm going to be out a long, long time, I turn H/3.5G off.
For me, it is VERY important I can use data and voice at the same time. I have my phone checking mail every 10 minutes, and it takes about 10-30 seconds to successfully check mail, so that means every 10 minutes, if an incoming call arrives, it'll go straight to voicemail and I miss it. That is not acceptable.
Plus, if I receive a business call, I can check mail, open up websites, etc. WHILE i am on the call. You have no idea how useful that is.
johnchan78 said:
I would like to expand this...
anaadoul is correct. In fact, regular GPRS cannot send data simultaneously as the voice call.
EDGE can SOMETIMES do so if the carrier's tower/cell supports this, but not all do, so while EDGE provides faster data connection, you may or may NOT get simultaneous data and voice. This is my experience at least. I think EDGE is always supposed to support simultaneous voice/data but my experience shows otherwise.
This is one of the primary reasons I am using a 3G network and 3G phone now. 3.5G/H while providing faster data, have no difference in regards to simultaneous voice data, but do use more power/battery so if I know I'm going to be out a long, long time, I turn H/3.5G off.
For me, it is VERY important I can use data and voice at the same time. I have my phone checking mail every 10 minutes, and it takes about 10-30 seconds to successfully check mail, so that means every 10 minutes, if an incoming call arrives, it'll go straight to voicemail and I miss it. That is not acceptable.
Plus, if I receive a business call, I can check mail, open up websites, etc. WHILE i am on the call. You have no idea how useful that is.
Click to expand...
Click to collapse
allow me to agree/disagree with you on some points.
imo, Edge doesn't support simultaneous call/data, except some devices that have some dual GSM radio as both operate on the same radio device level.
afaik the technology of 3G+ is different, the voice itself is not being transmitted as GSM signal, it's converted into a something similar to VOIP (that what makes Video Call Happens), a phone call uses one channel for audio transmit, the good thing is that the archetecture of 3G+ is designed to have multiple simultaneous connections to the tower cell, this will allow more transfer bandwidth, while this makes you able to browse and talk at the same time, it also puts more load on the cell (the cell can accept a certain fixed number of connections depending on the location and population of the area) resulting on people getting Network Busy Error!
so the result is a data connection is dropped if the cell is full in order to take a phone call.
what makes 3G+ really fast is that it can open milti channels with the cell, allowing more allocated bandwidth (we all know it reaches up to 7.2mbps).
3G+ consumes LESS power imo than GPRS/EDGE (Data connection only, voice calls consumes more on 3G+) as 3G+ will close all active connections when there is no application transferring (see the H icon disappearing when no application is downloading anything and 3G/3.5G icon is there, once an internet request is made it will go back to H).
so the result i think as follows
GPRS/EDGE : Low battery consumption for voice calls, High for Data & No simultaneous Call & Data.
3G/3.5G/HSDPA : Higher battery consumption for voice calls, Low for Data & Supports simultaneous Call & Data.
btw, i am connected to my Company's exchange server using Microsoft Direct Push. when the connection is G or E, i loose my battery more quicker than 3G/3.5G/H
even i have noticed that 3G+ consumes way less power that WiFi (now my email is synced over the air even in the office so my battery won't die quickly. don't worry i have a huge data plan )
please correct me if i'm wrong, all my information above is based on personal experiance
cheers
Well, I don't know if this will work for everyone but I fixed my issue. I just called my voicemail and put it on speakerphone in order to keep the voice connection open. Then I tried surfing with Opera a few times. The first few times it wouldn't connect, but then suddenly my phone beeped twice and I got the connection window saying my 3G was connecting. At first I thought I had just forced it but in retrospect, I think I just had a bad signal and had just connected to my 3G network. Thanks for all the info guys!
k20z3_si said:
suddenly my phone beeped twice and I got the connection window saying my 3G was connecting.
Click to expand...
Click to collapse
Call dropped maybe?!
try this,
Start -> Settings -> Phone -> Band
1.Set network type to WCDMA
2.Set GSM/UMTS band to UMTS
these forces your device into a 3G+ network
3.open commManager from start menu
4.turn dataconnection ON
5.Make a call
6.try browsing
7.Post Here
cheers
anaadoul said:
allow me to agree/disagree with you on some points.
imo, Edge doesn't support simultaneous call/data, except some devices that have some dual GSM radio as both operate on the same radio device level.
afaik the technology of 3G+ is different, the voice itself is not being transmitted as GSM signal, it's converted into a something similar to VOIP (that what makes Video Call Happens), a phone call uses one channel for audio transmit, the good thing is that the archetecture of 3G+ is designed to have multiple simultaneous connections to the tower cell, this will allow more transfer bandwidth, while this makes you able to browse and talk at the same time, it also puts more load on the cell (the cell can accept a certain fixed number of connections depending on the location and population of the area) resulting on people getting Network Busy Error!
so the result is a data connection is dropped if the cell is full in order to take a phone call.
what makes 3G+ really fast is that it can open milti channels with the cell, allowing more allocated bandwidth (we all know it reaches up to 7.2mbps).
3G+ consumes LESS power imo than GPRS/EDGE (Data connection only, voice calls consumes more on 3G+) as 3G+ will close all active connections when there is no application transferring (see the H icon disappearing when no application is downloading anything and 3G/3.5G icon is there, once an internet request is made it will go back to H).
so the result i think as follows
GPRS/EDGE : Low battery consumption for voice calls, High for Data & No simultaneous Call & Data.
3G/3.5G/HSDPA : Higher battery consumption for voice calls, Low for Data & Supports simultaneous Call & Data.
btw, i am connected to my Company's exchange server using Microsoft Direct Push. when the connection is G or E, i loose my battery more quicker than 3G/3.5G/H
even i have noticed that 3G+ consumes way less power that WiFi (now my email is synced over the air even in the office so my battery won't die quickly. don't worry i have a huge data plan )
please correct me if i'm wrong, all my information above is based on personal experiance
cheers
Click to expand...
Click to collapse
I agree... 3G and 3G+ seem to consume LESS battery than WIFI!
As for Edge, my experience is that I never could get simultaneous voice/data, but you're right, both the cell AND the phone need to support this function. I dont think our Xperia's hardware actually supports this at all. When I switched to using the Xperia I had purposely changed to a 3G network to take advantage of the 3G/3G+ capabilities it has.
i am quite sure that GPRS does not support simultaneous... everytime i call, a "cancel" icon appeared
I called AT&T to see if they support simultaneous Data and Voice and they said they do, but your phone has to as well. The X1 supports it also, so I just think I wasn't asble to do so because I was only in GPRS, not 3G.
leobox1 said:
i am quite sure that GPRS does not support simultaneous... everytime i call, a "cancel" icon appeared
Click to expand...
Click to collapse
It doesn't. We already stated that above. anaadoul and me already stated that above.
Is it possible to build a device that emits a 2g cell phone signal and will connect to devices with specific sim cards that allows you to use a DZ09 that only supports 2g via wifi or possibly 4g LTE or 5g cellular antennas either on the emitter or on a normal modern android phone connected to it via a cable or Bluetooth and an app? It basically needs to be a 2g to wifi/4g LTE/5G/Android Phone adapter. 9s this possible o possible already in existence? I really just want to make a 2g smartwatch (DZ09) work with some kind of data connection if that helps.
n3tfox said:
Is it possible to build a device that emits a 2g cell phone signal and will connect to devices with specific sim cards that allows you to use a DZ09 that only supports 2g via wifi or possibly 4g LTE or 5g cellular antennas either on the emitter or on a normal modern android phone connected to it via a cable or Bluetooth and an app? It basically needs to be a 2g to wifi/4g LTE/5G/Android Phone adapter. 9s this possible o possible already in existence? I really just want to make a 2g smartwatch (DZ09) work with some kind of data connection if that helps.
Click to expand...
Click to collapse
The short answer is no. Mobile communication technologies are not open source or open use - meaning that you have to be licensed to produce such hardware, and the carriers also have be licensed to use that radio band. Even if you could build a low power 2g transceiver, it would still be illegal in many countries as you'd be using radio space that belongs to a particular carrier. Worse, you'd be designing something that would act as a "host" for a 2G cell, which has some legal implications (like the infamous Stingray device).
The only bands you can use without a license are 2.4GHz, 5GHz, and part of the 6 GHz bands.
I have an amateur radio license, and I'm only licensed to use specific radio bands.