Using unlocked v20 on AT&T - LG V20 Questions & Answers

Hi guys.
Will I have any band issues if I get the phone unlocked from LG?
Does it have all of the LTE bands for AT&T?
What about getting a t mobile V20 and using it on AT&T?
Thank you.

Probably. I am using a verizon v20 on my tmo sim and it never gets LTE. Just H+. Its a crap phone in that regard.

borisb said:
Hi guys.
Will I have any band issues if I get the phone unlocked from LG?
Does it have all of the LTE bands for AT&T?
What about getting a t mobile V20 and using it on AT&T?
Thank you.
Click to expand...
Click to collapse
http://willmyphonework.net
Use this. I recently discovered the site and it has helped me a ton.
Sent from my LG-H910 using Tapatalk

The unlocked V20 (US996) will work on ATT, even though it does not have ALL the bands. I have one on ATT right now and don't have any issues. The missing bands are for newer frequencies being added to support capacity. I live in a metropolitan area so I have good base support. Check this link for details. https://www.frequencycheck.com/models/AzWoD/lg-us996-v20-lte-a

papashex said:
The unlocked V20 (US996) will work on ATT, even though it does not have ALL the bands. I have one on ATT right now and don't have any issues. The missing bands are for newer frequencies being added to support capacity. I live in a metropolitan area so I have good base support. Check this link for details. https://www.frequencycheck.com/models/AzWoD/lg-us996-v20-lte-a
Click to expand...
Click to collapse
OK I see. I think I will stay away from the unlocked version.

borisb said:
OK I see. I think I will stay away from the unlocked version.
Click to expand...
Click to collapse
To each his/her own. Reading papashex's words is what finally convinced me to get this particular version.
It has the same bands as my S4. US996 is missing Band 33 I believe, well so is my S4. I think I'll be fine.

Related

Unlocked Note 3 LTE for the USA Market?

My apologies if this has been discussed before.
Is there, or has there ever planned on being, an unlocked Samsung Galaxy Note 3 (LTE version) for the US market, which I could possibly region sim-unlock at a later time? I originally planned on purchasing a European unlocked LTE version, but after finding out both LTE won't work on AT&T and the phone is region sim-locked, I'm **** outta luck.
Thanks
keennay said:
My apologies if this has been discussed before.
Is there, or has there ever planned on being, an unlocked Samsung Galaxy Note 3 (LTE version) for the US market, which I could possibly region sim-unlock at a later time? I originally planned on purchasing a European unlocked LTE version, but after finding out both LTE won't work on AT&T and the phone is region sim-locked, I'm **** outta luck.
Thanks
Click to expand...
Click to collapse
AT&T allows you to unlock their phones if your account is in a good standing and you have been under contract with this phone for more than 6 months. You can request unlock code through AT&T website. Alternately, there are a bunch of paid sites out there, which will generate an unlock code for you based on your model # and IMEI, for $25-30USD.
You got options, if all you want is the worldwide voice capability. As you said, version with AT&T LTE bands will not have 4G connection in 99% of the other countries in the world. There is only a handful of other countries, which use LTE band 4 and only Puerto Rico uses band 17.
T-Mobile also allows you to unlock it when:
You pay in full
You pay it off
Does anyone know if the T-Mobile Version will work on AT&T LTE? Now that it is confirmed that the AT&T version is Bootloader Locked, that is my only other option. Otherwise it doesn't look like I'm going to be picking up an N3 unless Samsung comes out with a developer edition. Fingers Crossed.
hollywould said:
Does anyone know if the T-Mobile Version will work on AT&T LTE? Now that it is confirmed that the AT&T version is Bootloader Locked, that is my only other option. Otherwise it doesn't look like I'm going to be picking up an N3 unless Samsung comes out with a developer edition. Fingers Crossed.
Click to expand...
Click to collapse
Yes, it will: http://support.t-mobile.com/community/phones_data_devices/android/samsung-galaxy-note-3
AT&T uses the frequencies 700MHz band 17 & 29, 1700MHz band 4, 2300MHz band 30. However, very small % of AT&T LTE coverage uses bands 29, 30, so you will get AT&T LTE coverage with T-Mobile GN3 in 99% of the places.
This has been answered many times in other threads in this very general section........
rooted,recovered,and rebooted from the ol' i777.......
sk8ordie0 said:
This has been answered many times in other threads in this very general section........
rooted,recovered,and rebooted from the ol' i777.......
Click to expand...
Click to collapse
His apologies in advance keeper of XDA.
Sent from my SPH-L710 using Tapatalk 2
Jfree3000 said:
His apologies in advance keeper of XDA.
Sent from my SPH-L710 using Tapatalk 2
Click to expand...
Click to collapse
That's fine and all..... ..... So many threads with simple questions that can be answered by a simple search and read. ..... wonder why no one has answered??
rooted,recovered,and rebooted from the ol' i777.......
hollywould said:
Does anyone know if the T-Mobile Version will work on AT&T LTE? Now that it is confirmed that the AT&T version is Bootloader Locked, that is my only other option. Otherwise it doesn't look like I'm going to be picking up an N3 unless Samsung comes out with a developer edition. Fingers Crossed.
Click to expand...
Click to collapse
I am planning on getting a unlocked Canadian LTE from either Telus or Rogers..The LTE works perfect with ATT and no locked bootloader. ALso you can tether all you want.
pachi72 said:
I am planning on getting a unlocked Canadian LTE from either Telus or Rogers..The LTE works perfect with ATT and no locked bootloader. ALso you can tether all you want.
Click to expand...
Click to collapse
Thanks for the info, I will probably go ahead and wait for those models to come out and get one of them. Besides, I do want to wait for a bit more developer support anyway. Do you know when those models are supposed to be coming out?
Don't know yet.
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
hollywould said:
Thanks for the info, I will probably go ahead and wait for those models to come out and get one of them. Besides, I do want to wait for a bit more developer support anyway. Do you know when those models are supposed to be coming out?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2464498
mircury said:
http://forum.xda-developers.com/showthread.php?t=2464498
Click to expand...
Click to collapse
Just had to bump this thread by saying thank you!
what worries me is that with only the tmob having the unlocked bootloader is that the custom roms will be far and few between. been very spoiled with 4.3 on my s4..

[Q] verizon g2 enable aws?

I just got this unlocked verizon g2 and am using it on att, I can't get lte but I was seeing if there's a way to enable aws on it? I really like this phone but this slow data is killing me
Sent from my VS980 4G using Tapatalk 4
MrPlNK said:
I just got this unlocked verizon g2 and am using it on att, I can't get lte but I was seeing if there's a way to enable aws on it? I really like this phone but this slow data is killing me
Sent from my VS980 4G using Tapatalk 4
Click to expand...
Click to collapse
AT&T doesn't use AWS, except in very very VERY few areas, and only for LTE. They use 700 MHz. Verizon uses 750 MHz.
Product F(RED) said:
AT&T doesn't use AWS, except in very very VERY few areas, and only for LTE. They use 700 MHz. Verizon uses 750 MHz.
Click to expand...
Click to collapse
But Verizon is starting to activate their AWS spectrum in "major metropolitan areas" but there are conflicting reports in regards to the Verizon variant of the G2 and AWS.
Especially since most recent Verizon LTE phones can access the spectrum yet it hasn't been confirmed for the G2.
Do you understand what AWS is though? It's just 1700/2100 MHz together. AT&T doesn't use it (except as I said in like less than 1% of their LTE areas). AT&T uses 850/1900 MHz for HSPA+ ("4G") and 700 MHz for LTE (which Verizon devices don't do).
AWS is what T-Mobile uses for LTE though, so you'd be able to get T-Mobile's LTE out of the box.
Sent from my SGH-I337
But lemme get one thing straight, can the phones run at these frequencies if a different modem flashed or what? Anyway this isnt going to be an issue for me because im buying an att variant and selling my Verizon variant
Sent from my VS980 4G using Tapatalk
MrPlNK said:
But lemme get one thing straight, can the phones run at these frequencies if a different modem flashed or what? Anyway this isnt going to be an issue for me because im buying an att variant and selling my Verizon variant
Sent from my VS980 4G using Tapatalk
Click to expand...
Click to collapse
No, it's more than just the modem file. Like you said, just go and buy the AT&T (or T-Mobile) version. The T-Mobile version will work on AT&T fully as well.
Sent from my SGH-I337
Product F(RED) said:
No, it's more than just the modem file. Like you said, just go and buy the AT&T (or T-Mobile) version. The T-Mobile version will work on AT&T fully as well.
Sent from my SGH-I337
Click to expand...
Click to collapse
Than its different hardware?
Also, T-Mobile variant will work on AT&T LTE?
Sent from my VS980 4G using Tapatalk
Bump
Need to know if tmobile variant will work on att lte out of box, about to go meet up with someone who has one and id rather not waste anyone's time..
Sent from my VS980 4G using Tapatalk
MrPlNK said:
Bump
Need to know if tmobile variant will work on att lte out of box, about to go meet up with someone who has one and id rather not waste anyone's time..
Sent from my VS980 4G using Tapatalk
Click to expand...
Click to collapse
I posted before that, yes, a T-Mobile device will fully work on AT&T with LTE and everything. If you don't have LTE on it when you put the SIM in, call up AT&T and tell them to turn on LTE on your account (if you've never had an LTE device on your AT&T account before).
Product F(RED) said:
I posted before that, yes, a T-Mobile device will fully work on AT&T with LTE and everything. If you don't have LTE on it when you put the SIM in, call up AT&T and tell them to turn on LTE on your account (if you've never had an LTE device on your AT&T account before).
Click to expand...
Click to collapse
Ive had lte phones since they came out, i just havent seen anything about it but you saying itll work. I just dont want to be stuck in the same position i am now with this Verizon phone
Sent from my VS980 4G using Tapatalk
MrPlNK said:
Ive had lte phones since they came out, i just havent seen anything about it but you saying itll work. I just dont want to be stuck in the same position i am now with this Verizon phone
Sent from my VS980 4G using Tapatalk
Click to expand...
Click to collapse
T-Mobile devices are the same as AT&T devices; the only thing different is that they also support T-Mobile's 4G (which uses AWS) where as AT&T devices don't. I promise you it'll work. Just make sure you ask the buyer for a receipt to prove that he paid for the phone in full; you might end up with a device that gets blacklisted because the buyer decides not to pay for the phone/his bill in full.
So, is the Verizon G2 AWS capable?
Sent from my EVO using xda app-developers app
casiouser said:
So, is the Verizon G2 AWS capable?
Sent from my EVO using xda app-developers app
Click to expand...
Click to collapse
Only for LTE. It won't get LTE on AT&T but it will on T-Mobile.
Sent from my Nexus 7 using Tapatalk 4
I don't get why people still think they can just bring a Verizon LTE phone to ATT OR ATT LTE to Sprint or Sprint LTE to Tmobile, etc. It is pretty ridiculous that most people don't understand how cell phones work and never look at the frequencies that are supported on the phone.
About Verizon AWS LTE...Verizon has said that they are only deploying 5,000 AWS LTE towers by the end of this year and willing be adding more sites in 2014. You think 5,000 LTE sites is a lot considering that Verizon's network comprises of 45,000 towers. Let me tell you it isn't considering that is only about 1/9 of the total towers spread out nationwide. You'll be lucky to get a stable LTE connection if you only have LTE BC 4 support considering the shorter range propagation characteristics of AWS spectrum. Anyone thinking of bringing over their Tmobile LTE phones to Verizon better think twice before doing that assuming they will get the same LTE range and coverage as its 700 MHz LTE network.
To me it is always easier to just sell the LTE phone that I am no longer a carrier with and buy the carrier branded LTE phone to avoid all this hassle of unlocking it and having to worry about frequency incompatibilities.
Verizon and att share an aws band. I know about phones, im not dumb. I was just exploring the possibility of it being achieved. If the phones have exactly same hardware across the board, than it means its software related, which in the android world, with alot of trial and error and work, most software issues can be overcome. Thanks for your huge rant though, you should go work for Verizon
Sent from my VS980 4G using Tapatalk
MrPlNK said:
Verizon and att share an aws band. I know about phones, im not dumb. I was just exploring the possibility of it being achieved. If the phones have exactly same hardware across the board, than it means its software related, which in the android world, with alot of trial and error and work, most software issues can be overcome. Thanks for your huge rant though, you should go work for Verizon
Sent from my VS980 4G using Tapatalk
Click to expand...
Click to collapse
Dude. I know everything there is to know about this. AT&T uses AWS LTE in VERY VERY VERY few areas. You won't be able to get LTE with your Verizon G2 on 99% of their network.
Sent from my SGH-I337

AT&T lg g2 using tmobile sim, No 4g/LTE

Hey, I've used xda plenty in the past before but never had to post a question so bear with me.
I bought a att lg g2 and a tmobile sim to go with it. I can only get 3g, no lte. Its very slow. I did some reading and it looks discouraging. I live in south texas.
Is there anyway to turn on the radio bands i need to make 4g/lte work? I saw a thread about how to turn on lte for custom roms. Will that work or not? I think tmobile uses bands 17 19 and 21. There are those bands in the hidden menu on my phone but idk. It looks like some att lg g2s work with tmobile lte and others do not. Thanks for your help.
Ps. Im on another forum where the attitude towards noobs is like xda's so take it easy on me lol.
First thing first, have you rooted, unlocked the phone and bootloader?
Sent from my Galaxy Nexus using Tapatalk
comk4ver said:
First thing first, have you rooted, unlocked the phone and bootloader?
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Yes, its rooted and unlocked for different carriers. Su is installed but not a custom recovery. Im not really interested in installing a custom rom at this point.
From the carrier pages:
AT&T LG G2 has bands 1,2,4,5 & 17
T-Mobile LG G2 has: 2,4,7 & 17
7 is 2600MHz so it's not relevant for the US
I would say it's not a phone capability problem
The T-Mobile LG G2 has a seting in networks for network mode: GSM, WCDMA, GSM+WCDMA, GSM+WCDMA+LTE
The same can be achieved with the Phone Info app https://play.google.com/store/apps/details?id=myc.phone.PhoneInfo
Also make sure you are using the fast.t-mobile.com APN http://support.t-mobile.com/docs/DOC-2090
That apn you linked above does not work on my phone. I talked to a tmobile rep this morning and thats the one he gave me. When that one didnt work i got referred up the line to a rep that sent me texts with setting patches that supposedly set my phone up like a tmobile one but i didnt get 4g/lte from that and it wasnt the lte apn. I did, however, find another fast.tmobile.com apn with a little bit different settings than the one linked above that gave me 3g. Im at a loss, I guess.
LTE works fine on this phone, I use a D800 on T-Mobile, you just need the LTE APN. That's what I use on mine.
Sent from my LG-D800
Im using the apn from this link and no 4g. Just edge. Its a lte apn tutorial. I know i have tmobile lte in my area. Thanks for the help so far tho.
http://forum.xda-developers.com/showthread.php?t=2236735
Do yall think it would be possible to install a tmobile kernel to maybe turn on bands that i need for tmobile lte? Tmobile uses bands 1700 and 2100. In some areas, it looks like, att phones do have tmobile lte .
jordylee18 said:
Do yall think it would be possible to install a tmobile kernel to maybe turn on bands that i need for tmobile lte? Tmobile uses bands 1700 and 2100. In some areas, it looks like, att phones do have tmobile lte .
Click to expand...
Click to collapse
Only use D800 kernels on this model.
Transmitted via Geass
Make sure there is a dash in t-mobile in fast.t-mobile.com
Did you ever get this fixed?
Ace42 said:
Only use D800 kernels on this model.
Transmitted via Geass
Click to expand...
Click to collapse
Thanks for Attached Thumbnails, I changed mine to match, and it works.
But it does take sometime to connect, especially inside house.
I'm running CM11 nightly 12/26.

LG V20 Unlocked (US996) vs TMobile LG V20?

Hey Guys,
So I am seriously interested in this phone but cant decide what the difference is between these 2 variants?
It seems that TMobile LG V20 has no support for CDMA and support for AWS-3 spectrum (Band 66)
The unlocked version seems to support CDMA but I dont know if it has support for Band 66.
Source TMobile LG v20 : http://www.t-mobile.com/cell-phones/lg-v20.html
LG v20 Unlocked: https://www.bhphotovideo.com/c/product/1285961-REG/lg_lgus996_ausasv_lg_v20_4gb_ram.html
Can someone please shed some light on this? Will the unlocked version include all the bells and whistles of TMobile variant?
Thanks.
adit07 said:
Hey Guys,
So I am seriously interested in this phone but cant decide what the difference is between these 2 variants?
It seems that TMobile LG V20 has no support for CDMA and support for AWS-3 spectrum (Band 66)
The unlocked version seems to support CDMA but I dont know if it has support for Band 66.
Source TMobile LG v20 : http://www.t-mobile.com/cell-phones/lg-v20.html
LG v20 Unlocked: https://www.bhphotovideo.com/c/product/1285961-REG/lg_lgus996_ausasv_lg_v20_4gb_ram.html
Can someone please shed some light on this? Will the unlocked version include all the bells and whistles of TMobile variant?
Thanks.
Click to expand...
Click to collapse
Has there been confirmation that the t-mobile variant is locked?
You'll have to look around but I thought it was confirmed the unlocked version B&H is selling is not Band 66 compliant.
CHH2 said:
You'll have to look around but I thought it was confirmed the unlocked version B&H is selling is not Band 66 compliant.
Click to expand...
Click to collapse
Thanks! Do you have any link that confirms that?
US996 is USCC (US Cellular) version which does not have B4 HSPA.
I can confirm that, unfortunately, the T-Mobile LG V20 will not come with an unlockable bootloader. Sorry to be the bearer of bad news, but this something I got straight from the top-level guys @ TMO.
Possible good news, see two post below.
What... "top level guys"? What's your connection? Hmmmm
Sent from my awesome T-Mobile LG V10!
@planetbeen That would be Mr. Lucero and Miss Viola, director's in their respective divisions.
Anyways... I might have some good news.
I was called this morning and included in a conversation between TMO and LG. LG is now saying the bootloader will not be "locked down". I tried asking about fastboot and they were being a bit shady and gave me a vague answer.
Take this how you will.
Well we now have a couple people who have received their v20.. Hopefully we'll know very soon!
Sent from my awesome T-Mobile LG V10!
Specs for the US996:
http://www.lg.com/us/cell-phones/lg-US996-Unlocked-v20-titan
CDMA 1.9 GHz CDMA PCS/800 MHz CDMA; GSM 850/900/1800/1900 MHz; LTE Bands 2/3/4/5/7/12/13/17/20/25
EVDO, EVDO Rev A, 1xRTT, LTE, GPRS, EDGE, UMTS, GSM, HSPA+, HSPA
What is the bloatware situation on the T-Mobile vs unlocked? And can all of the bloat be deleted? (Especially any anti-virus software!)
Despite my phone will be arriving on monday, Let me ask you a question that might make you get your choice. do both of then offer great promotions? and which one has the frequencies more suitable to your needs?
I pre ordered the tmobile variant because im currently on tmobile. But that's not the only reason, i grabbed all the offers too and the phone ended up being $520 (+ 49.99 down payment + 53.90 of taxes) thanks to the $200 dollars when you trade-in a 4g phone (any phone that is 4g (preferably 4g lte), and also i get the free H3 earphones (i have to redeem it on LG website). And also, i get the opportunity of the free tablet (sure, at a cost of having to add an extra line but that is only 10 dollars more for 24 month and also is optional). In additon, Tmobile variant has unlocked bootloader, no other variant has reported that as far as i know.
How do you know it has an unlocked bootloader? I got mine yesterday. Is there any way we can check I recovery or something to see if it's locked?
Paradoxumical said:
I can confirm that, unfortunately, the T-Mobile LG V20 will not come with an unlockable bootloader. Sorry to be the bearer of bad news, but this something I got straight from the top-level guys @ TMO.
Possible good news, see two post below.
Click to expand...
Click to collapse
I take it you are the master of all that is holy?
thatisandwas said:
How do you know it has an unlocked bootloader? I got mine yesterday. Is there any way we can check I recovery or something to see if it's locked?
Click to expand...
Click to collapse
because there was someone who already did it. it doesnt come unlocked, but it is unlockable , at least for the Tmobile version.
Link: https://www.reddit.com/r/lgv20/comments/58568e/v20unlockable_bootloadervery_simplesame_as_g4g5/
also there are some posts around in XDA LG V20 section, the first 3 sub-sections. Right now @bountyman334 has tried several methods to root it however he hasnt hit the spot yet. But im sure there are also quite a few people who haven't spoken but are trying to root it. You will have to ask them how did the manage to do it, but at least we know that if we have the Tmobile variant, we have unlockable bootloader. :good::good:
Oh man that is awesome to hear! I was just saying the only thing that could make this phone the best in years would be if I could install custom roms like the old days!
thatisandwas said:
Oh man that is awesome to hear! I was just saying the only thing that could make this phone the best in years would be if I could install custom roms like the old days!
Click to expand...
Click to collapse
But remember, unlocked bootloader doesnt mean you will get root and roms. (I will soon be an owner of the V20 tmobile variant so is not like i m not expecting for a rooting method and roms soon after) . On the other hand, we are closer than any other variants
ice5192 said:
I take it you are the master of all that is holy?
Click to expand...
Click to collapse
Holy, light, pure, good and just.
No guarantee.....but......
joseguillen1994 said:
But remember, unlocked bootloader doesnt mean you will get root and roms. (I will soon be an owner of the V20 tmobile variant so is not like i m not expecting for a rooting method and roms soon after) . On the other hand, we are closer than any other variants
Click to expand...
Click to collapse
I am hoping that with an unlocked Bootloader more devs will jump on-board; especially with Samsung no longer being dev friendly for US models. I am very pleased with the V20. I wasn't sure I would find something I was happy with to replace my TMobile Note 4. But so far this is an excellent choice.
FAUguy said:
Specs for the US996:
CDMA 1.9 GHz CDMA PCS/800 MHz CDMA; GSM 850/900/1800/1900 MHz; LTE Bands 2/3/4/5/7/12/13/17/20/25
EVDO, EVDO Rev A, 1xRTT, LTE, GPRS, EDGE, UMTS, GSM, HSPA+, HSPA
Click to expand...
Click to collapse
This is the same as the unlocked LG G5. It won't work on Sprint. Why would any company make an unlocked cell phone that works on three of the four US carriers? Phones that work on Sprint can be used on RingPlus who offer free phone/data plans.
LG's unlocked phones are an abortion done with pliers.

LG V20 VS995 Verizon no 4G/LTE

Dear all,
I bought a LG V20 VS995 on ebay. Unfortunately I don't get LTE. I live in Germany and bought this VS995 from the USA with the verizon branding. I've already googled and looked on xda but couldn't solve it. My network in Germany - "o2" - uses three different LTE bands: 800mhz, 1800mhz and 2600mhz. All of them are supported by the LG V20 VS995.
I've also heard that the V20 has a weak LTE antenna. Could this be the reason?
Could you please suggest me something?
Thank you in advance
Alex
obuchovskij said:
Dear all,
I bought a LG V20 VS995 on ebay. Unfortunately I don't get LTE. I live in Germany and bought this VS995 from the USA with the verizon branding. I've already googled and looked on xda but couldn't solve it. My network in Germany - "o2" - uses three different LTE bands: 800mhz, 1800mhz and 2600mhz. All of them are supported by the LG V20 VS995.
I've also heard that the V20 has a weak LTE antenna. Could this be the reason?
Could you please suggest me something?
Thank you in advance
Alex
Click to expand...
Click to collapse
Buy a different phone
Sent from my LG-H910 using XDA Labs
cnjax said:
Buy a different phone
Sent from my LG-H910 using XDA Labs
Click to expand...
Click to collapse
Hi,
thanks for your answer. To be honest I don't want any other phone. I bought the V20 because of the quad dac. I paid 130$ and this is a great price. V30/V40 are a lot more expensive and the new V50 costs about 1260$ in Germany.
3g works great with my V20, I get about 6mbit/s down and 1,5mbit/s up. It's enough for me. Don't want to pay more at the moment.
LTE would be nice to have, but it's not a must have.
Greets
Alex
obuchovskij said:
Hi,
thanks for your answer. To be honest I don't want any other phone. I bought the V20 because of the quad dac. I paid 130$ and this is a great price. V30/V40 are a lot more expensive and the new V50 costs about 1260$ in Germany.
3g works great with my V20, I get about 6mbit/s down and 1,5mbit/s up. It's enough for me. Don't want to pay more at the moment.
LTE would be nice to have, but it's not a must have.
Greets
Alex
Click to expand...
Click to collapse
Hi I also have a vs995 which I am using in Australia. To enable LTE you need to google your mobile providers APN settings then type it in your in Mobile networks > Access Point Names
For example I am with Telstra so I google Telstra 4g apn and then i wrote it in and it worked for me. Hope this helps you.
If you still get 3g after that then you can download an app that forces 4g only as since it will stay on 3g if 4g signal is weaker than 3g

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