Database Users

Cell info broadcast?

HI guys,
If you remember the old phones had an option to display Cell info (Cell broadcast) which was typically on channel 50 and displayed area code, location name, etc?
Do we have this option in Android? Any widget that can do that?

On my Nexus 4 (Stock 4.2.1), in Settings -> Wireless & Networks there's an option called "Cell broadcasts" where you can choose to be
notified of stuff like - I kid you not - tsunamis, child abduction emergency bulletins, and extreme/severe threats to life and property. The
source for this setting can be found in the Phone.apk source[1], which also indicates even more options (weather for example), but these
are only displayed if available... maybe with some hacking you might be able to get the info you want...
[1] src/com/android/phone/CellBroadcastSms.java (XDA won't let me post links yet...)

caspase said:
On my Nexus 4 (Stock 4.2.1), in Settings -> Wireless & Networks there's an option called "Cell broadcasts" where you can choose to be
notified of stuff like - I kid you not - tsunamis, child abduction emergency bulletins, and extreme/severe threats to life and property. The
source for this setting can be found in the Phone.apk source[1], which also indicates even more options (weather for example), but these
are only displayed if available... maybe with some hacking you might be able to get the info you want...
[1] src/com/android/phone/CellBroadcastSms.java (XDA won't let me post links yet...)
Click to expand...
Click to collapse
He`s not asking for that. He is asking about tower info. Market place search Cell ID Info, or Network info. I dont use it as much since Ive been on GSM (AT&T) since 2011. But for SEVERAL years with CDMA I`d always look at my SID/NID and info like that even with my Flip Phones and blackberrys while traveling, But with GSM it seems harder catch up with the numbers like I could on CDMA.

[Q] Root

I just rooted my Note 3 and am I trying to access the hidden menu to activate band 4 LTE for AT&T. Each time I use a file editor, it says I have no permissions to save the file. I even used Super User being flashed, but that caused problems and my phone unrooted itself (strange, idk why.) How can I enable the hidden menu without permissions? I really need LTE on AT&T because the HSPA and HSPA+ speeds are atrocious. Any help will be appreciated.

nviz22 said:
I just rooted my Note 3 and am I trying to access the hidden menu to activate band 4 LTE for AT&T. Each time I use a file editor, it says I have no permissions to save the file. I even used Super User being flashed, but that caused problems and my phone unrooted itself (strange, idk why.) How can I enable the hidden menu without permissions? I really need LTE on AT&T because the HSPA and HSPA+ speeds are atrocious. Any help will be appreciated.
Click to expand...
Click to collapse
I would recommend that you use root browser. That way you can edit the value, using the built in text editor. I used this my app, to edit the service menu value to ON then save it. After saving I would reboot your phone to make sure the changes were saved in the build prop. After your phone reboots, type this in the dialer: *#060# and you should recieve an MEID number that should look something like this: 9849098408940/00
Then you can access your hidden menu by typing in : *#27663368378# from there you can turn enable band 4 and LTE-AWS if it's available in your area. Good luck and happy testing If you have further questions, please have a look at this thread:
http://forum.xda-developers.com/showthread.php?t=2530523

Getting APN to show on CDMA outside US

Hi, I've since the beginning of this year been trying to get my XT907 data to work on my local CDMA network. When I put a GSM card, the APN shows it's list and becomes selective. I'm wondering if this is SIM dependent and if yes then what exactly could be causing it. I even edited the apns-conf.xml but no difference. Since NV PPP is locked and cannot be written into using any, DFS, CDMAWS, Radiocomm, QXDM, I have been curious about the following NV items that maybe causing APN restrictions. These do not seem to be Qualcomm's but manufacturer's (Motorola). Also are the showing of APNs dependent on the SIM cards? Any thoughts on these or any other relevant info.
Code:
Set to 1 in 1st byte
8312 - no change
8318 - no change
8319 - no change
8320 - no change
8321 - no change
8322 - tried for stopping MCC/MNC check
8323 - no change
8326 - not writable
8333 - no change
8337 - no change

Mod please delete this post.

Please note I've edited the entire post with heading. Sorry for the mess didn't want to open another new thread.

[GUIDE] [ROOT] Enable T-Mobile VoHSPA/HSPA+

[size=+1]This guide was written as a primer to attaching RCS/IMS services to carrier networks that normally do not carry this type of traffic. Additionally, this guide will help you maximize your phone's capabilities by allowing you internet access while on a call simultaneously on networks other than LTE/WiFi. I expect in smaller towns where LTE coverage isn't as great this will help give you back that functionality. I will only be providing instructions for HSPA/HSPA+ (aka HSPA-DC or Dual Channel) as it's the only one I've tested, but since you'll have access to everything, you can experiment a little.[/size]
Prerequisites:
Rooted Samsung S7 (I used SM-G930F, may work with S6/S8, haven't tested), w/XAA CSC (TMB CSC may work as well, haven't tested)
Phone INFO
A little bit of balls, and willingness to deal with possible blowback by T-Mobile (they haven't said anything to me, yet, but this is breaking the standards!)
Steps:
Launch Phone INFO, open the main menu on the top left (3-bars), select "Secret Codes". (If you get any errors, hit YES to continue anyways, let it sit for a minute and if it doesn't stop searching, just tap to stop the searching early.)
Scroll through the secret codes, look for the app "Settings" with applet code "com.samsung.avdp.imssettings.SecretCodeReceiver" (On my SuperStock 2.8 S7 it's code number 467), select it and finally select Launch 0.
In the IMS SETTINGS display you now have click on IMS Profile.
Select TMobile LTE/WiFi
Select Network Enabled (>)
Here you can select which network types you want to enable IMS service on, the options "lte" and "wifi" should already be checked. You can now check "hspa" here as well for this guide.
[highlight]NOTE:[/highlight]
If "lte" is true 4G LTE (All carriers);
"hspa" is T-Mobile's original "4G" (high speeds >10mbps, slightly higher latency, rolled out to compete with Verizon's speeds prior to LTE)
"umts" is "3G"
"gsm" is "2G"
"ehrpd" is Sprint/Verizon's "EVDO" (for Sprint/Verizon users this may be an option instead of hspa?)
"tdscdma" is Sprint/Verizon's "3G".
Press back on the phone, next click on Service (>)
Scroll down to the "HSPA" section, you'll see all the services are blank, we need to enable which services to use on this type of network;
mmtel
smsip
slm
im
ft
presence
euc
Press back on the phone, and finally hit the Save (disk icon) button at the top, and back out completely.
Now when you're on HSPA/HSPA+ on T-Mobile's networks, you'll have the VoLTE icon and calls will be handled over data versus tying up the entire radio. (Check out my screenshot!) You can be bold enough to enable additional networks, though I caution that none of the other T-Mobile valid options umts/gsm will likely have enough throughput or low enough latency to be effective at all. Additionally, I noted when a call started, the phone took a little bit to adjust the jitter buffer to play the call smoothly, resulting in my voice coming through the other person's end garbled and jittery for the first few seconds (they came through fine to me). Once the call is up for 5+ seconds it's likely fully adjusted and you should have no problems afterwards. Do remember that because of the additional latency on the lower networks, you are going to have more delay in your conversation, though on my test call in the middle of the California desert along the I-5 between SF and LA, it wasn't noticeable on either side of the call. During that test call, I kept my Google Maps updated with the latest traffic conditions on my car's tablet via hotspot, so mission accomplished (for me at least).
Let me know in the replies if you attempted this tweak, where you tested, and if it worked for you!

An interesting idea... I'm gonna try this soon on my G930F.
It's rather clever that you flashed the CSC from XAA or another US carrier on top of the international firmware, to enable carrier specific features.
Been struggling with this for while, going about the wrong way by loading /patching certain modules/app to accomplish this. Why didn't I think of this?? he-he
Which initial CSC firmware did you use on your G90F, OXA/UUB/XEF/XEU?
In addition to selecting WiFi, LTE, HSPA etc, which one of these did you select for Tmo?
mmtel, smsip, slm, im, ft, presence, euc
I have AT&T as my carrier.
Thanks!

billa said:
An interesting idea... I'm gonna try this soon on my G930F.
It's rather clever that you flashed the CSC from XAA or another US carrier on top of the international firmware, to enable carrier specific features.
Been struggling with this for while, going about the wrong way by loading /patching certain modules/app to accomplish this. Why didn't I think of this?? he-he
Which initial CSC firmware did you use on your G930F, OXA/UUB/XEF/XEU?
In addition to selecting WiFi, LTE, HSPA etc, which one of these did you select for Tmo?
mmtel, smsip, slm, im, ft, presence, euc
I have AT&T as my carrier.
Thanks!
Click to expand...
Click to collapse
Firmware is XXU (SuperStock v2.8), for you add the XAA CSC (it has all the US carriers blended into it), and when you go in to tweak these settings, you should see just LTE enabled for you (since AT&T does not support wifi calling at this time as far as I know), just copy all the options selected there, EXCEPT video, video is far too heavy to be put on any other network than WiFi or LTE.

Cynagen said:
Firmware is XXU (SuperStock v2.8), for you add the XAA CSC (it has all the US carriers blended into it), and when you go in to tweak these settings, you should see just LTE enabled for you (since AT&T does not support wifi calling at this time as far as I know), just copy all the options selected there, EXCEPT video, video is far too heavy to be put on any other network than WiFi or LTE.
Click to expand...
Click to collapse
Great, I also have a Qualcom S7 (G930A) with original AT&T firmware, which has VoLTE (Voice over LTE/IP).
That's the primary reason I'd like to try your mod to get VoLTE working on the Exynos S7 (G930F).
I understand I have to select WiFi and LTE, but I'm a bit confused when you said "just copy the selections",
which particular items should I select/enable from this list?: mmtel, smsip, slm, im, ft, presence, euc
Would you happen to know the meaning of those acronyms?
I understand that I just flash the CSC file only from the XAA package, but what's the REGION code of your main XXU firmware?
XXU has to be a sub-set of one of the ones below, but not sure which one.
If you look at the last few lines in your CSC file with a hex viewer, you should be able to see it.
As you can see in this list, after the "/" would be your sub-code XXU, but I need the main region code in order the obtain the same main firmware as you have. Though not absolutely necessary, I'm just curious about the XXU version.
ATO/YXY - Austria Open
BTU/OXA - UK Open
E01/E02 - Europe
ECO/EON - Ecuador
EUR/EUR - Europe Greece
EUX - Europe
KOR - Korea
LUX/LUX - Luxengurg
MOT - Slovenia MobiTel
OLB - Asia
PAP - Europe
PCT/UWA - Puerto Rico
SAM/UWT - South America Open
SEE/OXX - South Europe Eastern
STS - Turkey
TMM/UWT - Mexico
TNZ/TNZ - New Zealand
TTT/UUB - Telecom Trinidad Tobago
XAX - Europe
XAZ - Europe
XER - Europe
XEV - Vietnam
XEU/XEU - UK/Europe
XFA/OJV - South Africa
XSA/XSA - Australia
XSS - Hong Kong
By the way, how ironic that we are both using identical phones as in your list below...
█ ··T··Mobile· Samsung Galaxy S7 (G930F)
█ Backup: Samsung Galaxy S4 (M919)

That is the list you need to select and on WiFi and LTE, settings should already be there if you flashed the XAA CSC correctly.

billa said:
Great, I also have a Qualcom S7 (G930A) with original AT&T firmware, which has VoLTE (Voice over LTE/IP).
That's the primary reason I'd like to try your mod to get VoLTE working on the Exynos S7 (G930F).
I understand I have to select WiFi and LTE, but I'm a bit confused when you said "just copy the selections",
which particular items should I select/enable from this list?: mmtel, smsip, slm, im, ft, presence, euc
Would you happen to know the meaning of those acronyms?
I understand that I just flash the CSC file only from the XAA package, but what's the REGION code of your main XXU firmware?
XXU has to be a sub-set of one of the ones below, but not sure which one.
If you look at the last few lines in your CSC file with a hex viewer, you should be able to see it.
As you can see in this list, after the "/" would be your sub-code XXU, but I need the main region code in order the obtain the same main firmware as you have. Though not absolutely necessary, I'm just curious about the XXU version.
ATO/YXY - Austria Open
BTU/OXA - UK Open
E01/E02 - Europe
ECO/EON - Ecuador
EUR/EUR - Europe Greece
EUX - Europe
KOR - Korea
LUX/LUX - Luxengurg
MOT - Slovenia MobiTel
OLB - Asia
PAP - Europe
PCT/UWA - Puerto Rico
SAM/UWT - South America Open
SEE/OXX - South Europe Eastern
STS - Turkey
TMM/UWT - Mexico
TNZ/TNZ - New Zealand
TTT/UUB - Telecom Trinidad Tobago
XAX - Europe
XAZ - Europe
XER - Europe
XEV - Vietnam
XEU/XEU - UK/Europe
XFA/OJV - South Africa
XSA/XSA - Australia
XSS - Hong Kong
By the way, how ironic that we are both using identical phones as in your list below...
█ ··T··Mobile· Samsung Galaxy S7 (G930F)
█ Backup: Samsung Galaxy S4 (M919)
Click to expand...
Click to collapse
Looking in Phone Info I get the following:
Product code: SM-G930FZKUZTO
Original CSC Code: ZTO
Firmware & Active CSC Codes: All
Available CSC Codes: ACG, AIO, ATT, BST, GCF, LRA, SPR, TFN, TMB, TMK, USC, VMU, VZW, XAA, XAS
CSC Country: USA / US

Cynagen said:
Looking in Phone Info I get the following:
Product code: SM-G930FZKUZTO
Original CSC Code: ZTO
Firmware & Active CSC Codes: All
Available CSC Codes: ACG, AIO, ATT, BST, GCF, LRA, SPR, TFN, TMB, TMK, USC, VMU, VZW, XAA, XAS
CSC Country: USA / US
Click to expand...
Click to collapse
Thanks for all the info.
By the way, the CSC code ZTO stands for Brazil, and secret code 467 stands for I.M.S.
In case anyone is interested, I have found a shortcut to the CSC changer activity as follows:
Root the phone.
Install the "Shortcut Master" app.
https://play.google.com/store/apps/details?id=org.vndnguyen.shortcutmaster.lite
Search for "Preconfig"
Run com.sec.android.Preconfig.Preconfig
Select the carrier CSC, and press Install.
Reboot the phone.

[ALL QUALCOMM PHONES] [How to] ADD ANY LTE BAND USING QXDM

DISCLAIMER: I'M NOT RESPONSIBLE IF YOU BREAK YOUR PHONE OR MODEM, ONLY DO THIS IF YOU KNOW WHAT YOU'RE DOING!
First you'll need:
SAMSUNG USB Driver
QXDM
https://androidmtk.com/download-qpst-flash-tool
Now follow the quick start guide HERE, skipping steps 12-30.
1. open QXDM.exe and go to NV Browser and select filter LTE then click 06828 then click one of the values then click read.
2. copy the string that shows up into a decimal to binary converter. As an example mine is 600196852264287. This converts in binary to
Code:
10001000011110000000111000001011001010110101011111
now, 1s are enabled bands, 0s are disabled bands. for example if you wanted to add Band 14, you would take the 14th from last digit in the binary string and change it to a 1, then convert the binary string to decimal and paste that string into QXDM and click write then reboot and you have Band 14.
to remove bands its the same process, convert to binary and replace the 1 with a 0, note that the start of the string has to be a 1, if it isn't simply remove the zeros in front of the next 1 then convert that to decimal (the size will be significantly smaller but that's fine, the higher the band number the more value it puts into the string) an example of this is i have band 4 disabled on my phone, i took the 4th from last 1 and made it a 0 and converted that to decimal and it now reads as 600196852264279, notice the last 2 numbers changed, that's the value of band 4 in the string. Band 2 equals 2 and Band 5 equals 16, and so on.
If I helped you please hit the thanks button!

Just cause you enable a band doesn't clean it'll work. If the phone doesn't have the antenna for the LTE band it's not going to work

Nitefire77 said:
Just cause you enable a band doesn't clean it'll work. If the phone doesn't have the antenna for the LTE band it's not going to work
Click to expand...
Click to collapse
Very true, doesn't hurt to try however maybe the antenna supports a band but isn't enabled on the phone no way to know till you try, if it doesn't work, just revert your changes or restore the backup you made before making any changes.

I've heard the s8 has all the same bands as the s9 but are disabled, too bad there isn't a radio zip to flash like there old phones
Sent from my SM-G955U using Tapatalk

FatalONEM8 said:
DISCLAIMER: I'M NOT RESPONSIBLE IF YOU BREAK YOUR PHONE OR MODEM, ONLY DO THIS IF YOU KNOW WHAT YOU'RE DOING!
First you'll need:
SAMSUNG USB Driver
QXDM
https://androidmtk.com/download-qpst-flash-tool
Now follow the quick start guide HERE, skipping steps 12-30.
1. open QXDM.exe and go to NV Browser and select filter LTE then click 06828 then click one of the values then click read.
2. copy the string that shows up into a decimal to binary converter. As an example mine is 600196852264287. This converts in binary to
Code:
10001000011110000000111000001011001010110101011111
now, 1s are enabled bands, 0s are disabled bands. for example if you wanted to add Band 14, you would take the 14th from last digit in the binary string and change it to a 1, then convert the binary string to decimal and paste that string into QXDM and click write then reboot and you have Band 14.
to remove bands its the same process, convert to binary and replace the 1 with a 0, note that the start of the string has to be a 1, if it isn't simply remove the zeros in front of the next 1 then convert that to decimal (the size will be significantly smaller but that's fine, the higher the band number the more value it puts into the string) an example of this is i have band 4 disabled on my phone, i took the 4th from last 1 and made it a 0 and converted that to decimal and it now reads as 600196852264279, notice the last 2 numbers changed, that's the value of band 4 in the string. Band 2 equals 2 and Band 5 equals 16, and so on.
If I helped you please hit the thanks button!
Click to expand...
Click to collapse
i swapped out your link for qpst links that require survey are not allowed:fingers:good:

TheMadScientist said:
i swapped out your link for qpst links that require survey are not allowed:fingers:good:
Click to expand...
Click to collapse
Wait what? Thanks I didnt even know...sorry.
Sent from my SM-G955U using Tapatalk

FatalONEM8 said:
Wait what? Thanks I didnt even know...sorry.
Sent from my SM-G955U using Tapatalk
Click to expand...
Click to collapse
yea wanted a survey to download
the new link is where i got my version from though:good:

Sorry if this is a newbie question, but can this do any good on US carrier phones? I assume there's no way to make Band 71 work.

TheGoddessInari said:
Sorry if this is a newbie question, but can this do any good on US carrier phones? I assume there's no way to make Band 71 work.
Click to expand...
Click to collapse
I tried to enable Band 71 but it didn't work the way I thought. The highest band I could enable was band 65 iirc. You can definitely still try it however.
Sent from my SM-G955U using Tapatalk

will this method work with exynos versions?

thiwankadananjaya said:
will this method work with exynos versions?
Click to expand...
Click to collapse
No that's why the title says all Qualcomm phones, exynos doesn't have the modem software Qualcomm has to be able to do this, unfortunately if you want to do the same thing you'll have to look elsewhere for a exynos version.
Sent from my SM-G955U using Tapatalk

FatalONEM8 said:
No that's why the title says all Qualcomm phones, exynos doesn't have the modem software Qualcomm has to be able to do this, unfortunately if you want to do the same thing you'll have to look elsewhere for a exynos version.
Sent from my SM-G955U using Tapatalk
Click to expand...
Click to collapse
cant find any thread about exynos unfortunately

Newb question here. I just migrated from an S8 that was purchased from Samsung to an S9 that's from Verizon. I am on At&t. I did adjust the apn settings and such, however I'm stuck on H+. I'm assuming this has something to do with the band? @OP, would this theoretically allow me to have 4g LTE?

Fractal.Effect said:
Newb question here. I just migrated from an S8 that was purchased from Samsung to an S9 that's from Verizon. I am on At&t. I did adjust the apn settings and such, however I'm stuck on H+. I'm assuming this has something to do with the band? @OP, would this theoretically allow me to have 4g LTE?
Click to expand...
Click to collapse
I'm sure it would but I think it would be much easier to just do a carrier firmware switch to att, there's many threads out there on how to complete this process.
Sent from my SM-G955U using XDA-Developers Legacy app

Why not use the Dialer Commands to enable all bands?
I'm not sure what the dial code is but there is a menu that lets you select WCDMA/GSM/LTE Bands and then at bottom has an option to Unlock all Bands

FatalONEM8 said:
DISCLAIMER: I'M NOT RESPONSIBLE IF YOU BREAK YOUR PHONE OR MODEM, ONLY DO THIS IF YOU KNOW WHAT YOU'RE DOING!
First you'll need:
SAMSUNG USB Driver
QXDM
https://androidmtk.com/download-qpst-flash-tool
Now follow the quick start guide HERE, skipping steps 12-30.
1. open QXDM.exe and go to NV Browser and select filter LTE then click 06828 then click one of the values then click read.
2. copy the string that shows up into a decimal to binary converter. As an example mine is 600196852264287. This converts in binary to
Code:
10001000011110000000111000001011001010110101011111
now, 1s are enabled bands, 0s are disabled bands. for example if you wanted to add Band 14, you would take the 14th from last digit in the binary string and change it to a 1, then convert the binary string to decimal and paste that string into QXDM and click write then reboot and you have Band 14.
to remove bands its the same process, convert to binary and replace the 1 with a 0, note that the start of the string has to be a 1, if it isn't simply remove the zeros in front of the next 1 then convert that to decimal (the size will be significantly smaller but that's fine, the higher the band number the more value it puts into the string) an example of this is i have band 4 disabled on my phone, i took the 4th from last 1 and made it a 0 and converted that to decimal and it now reads as 600196852264279, notice the last 2 numbers changed, that's the value of band 4 in the string. Band 2 equals 2 and Band 5 equals 16, and so on.
If I helped you please hit the thanks button!
Click to expand...
Click to collapse
Hello and thanks for all this help. I am currently experimenting on a SM-N900T (Note 3 for TMobile) before trying my hand on a newer Asus Zenfone for India that is lacking some bands I require here in the USA.
It has taken a while but I have managed to connect to the phone and with QXDM I see a value of only 65627 for item 06828 (LTE). I expect a much lower number than on your phone as this is much older with, I suspect, far fewer bands supported than yours.
This converts to 10000000001011011 in the Windows programmer calculator. If I understand, the right most (least significant) bit represents band 1 (2100), the next most signification bit represent band 2 (1900), and so on. Is this correct? If so, it would appear from the value read from the phone that the following LTE bands should be on and supported: 1, 2, 4, 5, 7, 17. And according to the T-Mobile page for this phone, that is correct. I have seen some other spec pages for this phone that also claim band 8 but I do not see that bit set.
To change this, do I simply compute the new decimal value from the bitmap put it into the item 06828 and press write? Is that all there is to this? In the referenced quick guide in steps 12-30 I see a whole bunch of other fiddling around. Just want to be sure I am on the right track.
Using the Network Signal Guru app's band locking page, I can see the above LTE bands checked. So I guess this is a good way to confirm the changes made.
Thanks!

I have a Nexus 2013 with a Qualcomm WRT1605L chip (limited to 7 lte bands) and I am trying to remove band 1 and add band 12. I am stuck on writing the value in 06828. It doesn't actually write because if I click read the original value is listed. I can change the value in 06829 but I still don't have band 12.

applegatetech said:
I have a Nexus 2013 with a Qualcomm WRT1605L chip (limited to 7 lte bands) and I am trying to remove band 1 and add band 12. I am stuck on writing the value in 06828. It doesn't actually write because if I click read the original value is listed. I can change the value in 06829 but I still don't have band 12.
Click to expand...
Click to collapse
I am certainly no expert. But you say the device is limited to 7 lte bands. Not exactly sure what that means. But I wonder if you try to change the current value to something only a tiny bit different, say remove one of the existing bands, if that value will take? I guess I am wondering if there is some special input data validation taking place on this device and the value being entered is simply not acceptable to the device. Perhaps I am over-thinking this. Might give a little more information.

Root Apparently Not Needed on Note 3 N900T
Just want to point out that root is apparently not required to do this on a Samsung Note 3 N900T. I found that I could, in fact must, enable CP from stock recovery. I was able to use *#0808# to gain access to the USB configuration. And it all worked. Your mileage may vary. Thanks for this post and all the help. The N900T was just an old phone used to experiment. The real target of all this is an Asus Zenfone Pro Max 1. Perhaps not as easy. Cheers

whitedavidp said:
I am certainly no expert. But you say the device is limited to 7 lte bands. Not exactly sure what that means. But I wonder if you try to change the current value to something only a tiny bit different, say remove one of the existing bands, if that value will take? I guess I am wondering if there is some special input data validation taking place on this device and the value being entered is simply not acceptable to the device. Perhaps I am over-thinking this. Might give a little more information.
Click to expand...
Click to collapse
The Qualcomm chip used in Nexus 7 2013, Nexus 4 and Nexus 5 could only support 7 lte bands and carriers were asking manufacturers to turn off band 12 because of infastructure issues (LINK). I have tried to disable band 1 and enable band 12. I can proceed to write after calculating the correct value of 71710 for bands 2,3,4,5,12,13,17 in qxdm. However, when I select read the value is still the original 69663 for bands 1,2,3,4,5,13,17.
I have tried to disable a single band without enabling any new bands and have the same result. I'm thinking it is somehow hardware locked on my device.