Database Develop

(FIX) VoLTE stopped working in latest MIUI stable/dev?

I had a Redmi 4x which when shipped had 8.2 MIUI version (Before some 3 months). That time I checked using Jio and VoLTE worked fine. Then, My mother was using it and now after certain auto updates it was on MIUI v8.5.4.0. I had ported her no to Jio (4G only network), and now VoLTE didn't work at all. I tried flashing Latest MM firmware. I even clean flashed MIUI9 Dev and even then VoLTE didn't work. Always IMS will not at all register (Checked via Phone info). I hence declared somehow Jio network block listed 4x (other countries models) but LTE used to work fine. Out of all hope, I tried Official RR with its own recommended FW and even then VoLTE was down..!! I even changed Device model (Redmi 4x to Redmi 4), still it was in vain. Even tried adding IMS in default AP. Some suggestion to Choose Home IMSI in SIM Toolkit will also not work because latest Jio SIM doesn't ship with SIM Toolkit option at all!!!
After full frustration and wasting one full day, I thought I should change the phone. But somehow suddenly it struck to try fastboot flash the oldest MIUI8 which device was booting initially. So after trying that, Voilaaaa! 1st time seeing VoLTE after long hours and late at night !!!
Somehow Now I flashed latest stable 8.5.4 MIUI and it also has VoLTE working. Even in custom ROMs VOLTE now is working. So yeah just to share my learning, to help people who are having tough time with VoLTE..! :highfive::highfive:

arvindgr said:
I had a Redmi 4x which when shipped had 8.2 MIUI version (Before some 3 months). That time I checked using Jio and VoLTE worked fine. Then, My mother was using it and now after certain auto updates it was on MIUI v8.5.4.0. I had ported her no to Jio (4G only network), and now VoLTE didn't work at all. I tried flashing Latest MM firmware. I even clean flashed MIUI9 Dev and even then VoLTE didn't work. Always IMS will not at all register (Checked via Phone info). I hence declared somehow Jio network block listed 4x (other countries models) but LTE used to work fine. Out of all hope, I tried Official RR with its own recommended FW and even then VoLTE was down..!! I even changed Device model (Redmi 4x to Redmi 4), still it was in vain. Even tried adding IMS in default AP. Some suggestion to Choose Home IMSI in SIM Toolkit will also not work because latest Jio SIM doesn't ship with SIM Toolkit option at all!!!
After full frustration and wasting one full day, I thought I should change the phone. But somehow suddenly it struck to try fastboot flash the oldest MIUI8 which device was booting initially. So after trying that, Voilaaaa! 1st time seeing VoLTE after long hours and late at night !!!
Somehow Now I flashed latest stable 8.5.4 MIUI and it also has VoLTE working. Even in custom ROMs VOLTE now is working. So yeah just to share my learning, to help people who are having tough time with VoLTE..! :highfive::highfive:
Click to expand...
Click to collapse
same issue with me
i have redmi 4x imported from china
jio volte works on miui marshmallow but it disapears as soon as i go on nougat miui

So what did you do? At first you installed oldest version(plz tell me which version) via pc, then update to 8.5.4, but plz tell me how you update it, ( pc or mobile?)

ashvinsingh29 said:
same issue with me
i have redmi 4x imported from china
jio volte works on miui marshmallow but it disapears as soon as i go on nougat miui
Click to expand...
Click to collapse
Cleean flash santoni_global_images_V8.2.9.0.MAMMIEA_20170427.0000.00_6.0_global and upgrade that to latest Nougat MIUI9 stable.., Thats how it worked for me
sahir7860 said:
So what did you do? At first you installed oldest version(plz tell me which version) via pc, then update to 8.5.4, but plz tell me how you update it, ( pc or mobile?)
Click to expand...
Click to collapse
Flashed Old MM - santoni_global_images_V8.2.9.0.MAMMIEA_20170427.0000.00_6.0_global then installed the latest Nougat

can we use redmi 4x fastboot rom, for Redmi 4 device??

arvindgr said:
Cleean flash santoni_global_images_V8.2.9.0.MAMMIEA_20170427.0000.00_6.0_global and upgrade that to latest Nougat MIUI9 stable.., Thats how it worked for me
Click to expand...
Click to collapse
Can you give link of that old version plz

sahir7860 said:
Can you give link of that old version plz
Click to expand...
Click to collapse
Check official website

Little Help!!
arvindgr said:
I had a Redmi 4x which when shipped had 8.2 MIUI version (Before some 3 months). That time I checked using Jio and VoLTE worked fine. Then, My mother was using it and now after certain auto updates it was on MIUI v8.5.4.0. I had ported her no to Jio (4G only network), and now VoLTE didn't work at all. I tried flashing Latest MM firmware. I even clean flashed MIUI9 Dev and even then VoLTE didn't work. Always IMS will not at all register (Checked via Phone info). I hence declared somehow Jio network block listed 4x (other countries models) but LTE used to work fine. Out of all hope, I tried Official RR with its own recommended FW and even then VoLTE was down..!! I even changed Device model (Redmi 4x to Redmi 4), still it was in vain. Even tried adding IMS in default AP. Some suggestion to Choose Home IMSI in SIM Toolkit will also not work because latest Jio SIM doesn't ship with SIM Toolkit option at all!!!
After full frustration and wasting one full day, I thought I should change the phone. But somehow suddenly it struck to try fastboot flash the oldest MIUI8 which device was booting initially. So after trying that, Voilaaaa! 1st time seeing VoLTE after long hours and late at night !!!
Somehow Now I flashed latest stable 8.5.4 MIUI and it also has VoLTE working. Even in custom ROMs VOLTE now is working. So yeah just to share my learning, to help people who are having tough time with VoLTE..! :highfive::highfive:
Click to expand...
Click to collapse
So I followed yr method & Yes i got my Volte back but now i'm stuck in Marshmallow and there's a bug with the screen auto rotate not functioning. I googled and found that many people who downgraded to MIUI 8 are facing this problem & there it was also written that wen they upgrade to MIUI 9 Nougat screen rotate functions are restored. So here's the thing me being from India need my Volte for Jio and after a long time finally got it to work...But if i upgrade to MIUI 9 Nougat i'm scared that i might lose my Volte again & have to start my previous process allover again starting with unlocking my bootloader as i have locked it while flashing it to MIUI 8. So my question to you is what did u mean when you said " Now I flashed latest stable 8.5.4 MIUI and it also has VoLTE working. " from here did u just did OTA update (coz i'm getting V8.5.2.0 MAMMIED Update via my updater app). Or did u use Fastboot flash to 8.5.4 MIUI .??
BTW I was thinking should i just download a update.zip of the latest stable global V9.2 Rom & flashed it via the Updater App using update package option.. skipping v8.5.2.0 & other minor Updates and just jump to the latest. Will i still have Volte working on my Phone if i update to MIUI 9.
I'm Confused.....Pliz Help
Thanks In Advance.

neguneli said:
I'm Confused.....Pliz Help.
Click to expand...
Click to collapse
Hi., I unlocked bootloader and I used fastboot method to go back to prev version. Once the volte worked, MIUI9 also got VoLTE working. So try clean flashing latest MiUi and VoLTE would still work...

arvindgr said:
Hi., I unlocked bootloader and I used fastboot method to go back to prev version. Once the volte worked, MIUI9 also got VoLTE working. So try clean flashing latest MiUi and VoLTE would still work...
Click to expand...
Click to collapse
By clean flashing do u mean fastboot method or update.zip recovery method.....
U see I'm confused as there are many forms of flashing so it fastboot method with miflash right!!.
Ok I will try to download this fastboot stable rom for miui 9.... let's see how it goes.
Thanks a lot...
Damn this phone really is high maintenance...

neguneli said:
By clean flashing do u mean fastboot method or update.zip recovery method.....
U see I'm confused as there are many forms of flashing so it fastboot method with miflash right!!.
Ok I will try to download this fastboot stable rom for miui 9.... let's see how it goes.
Click to expand...
Click to collapse
I meant only Fastboot method. Give it try and tell us if it works..

arvindgr said:
I meant only Fastboot method. Give it try and tell us if it works..
Click to expand...
Click to collapse
So I tried and guess what it didn't work. Volte is confirmed to be working only in marshmallow miui8 and as we try to jump to nougat miui9 volte just doesn't work. So i flashed back to marshmallow and then did ota update ( minor 350mb update) which is still Android 6 and volte still works now I get ota update for miui 9 but I'm not willing to jump the gun anymore......
Maybe if I do ota update to miui9 after getting volte maybe it could miraculously get it's volte back but having flashed the phone multiple times and since I need to use this phone I'm gonna stop here so we'll never know if volte is ever gonna work in miui9 via ota...
Btw even if I got volte back the gyro and screen rotation is not working both in the old marshmallow and in the recently updated ota marshmallow. So playing some gyro games and having the gallery to open pics in auto rotate is out of the question.
I even tried flashing persist.img via both fastboot and miflash method & while it didn't allow me to erase and write the persist.img even though my bootloader is unlocked in fastboot method. I did managed to flash it via miflash tool after editing some .bat files via notepad++ so that I only flash the persist.img and not the whole rom.
There's a whole tutorial about this too on Google and guess what again this methods didn't do anything and I have both gyro and auto rotate not functioning.
It will function in miui 9 but in that version we'll know that volte doesn't work so....
My only conclusion is that without Xiaomi dev patching it out there's just no way this bug can be solved by simple flashing as in either form of the OS one ends up sacrificing one function or the other.
Btw thanks for replying, helping and hearing me out...
Really appreciate it.

neguneli said:
It will function in miui 9 but in that version we'll know that volte doesn't work so....
My only conclusion is that without Xiaomi dev patching it out there's just no way this bug can be solved by simple flashing as in either form of the OS one ends up sacrificing one function or the other.
Btw thanks for replying, helping and hearing me out...
Really appreciate it.
Click to expand...
Click to collapse
This whole VoLTE concept more or less isnt as reliable as legacy 2g/3G calls. Even yesterday for some wierd reason, VoLTE in this phone didn't work. I swapped SIM to another VoLTE where it didn't work on it too. I just let it for half day after which it started working. There isn't one proper way when on rooted phones, to easily get VoLTE related log data, so that we can try fixing the rootcause. Anyways I'm glad somehow you are able to manage...

My Volte working with miui 9 stable roms

Pliz give detailed description.
I'm excited to hear about this.
Btw no offence but you are sure that yr device is Redmi 4X and not Redmi 4, right!!

try to change your location in additional setting from your system location to another location, ex: thailand, and then check your volte setting

Ok that thought never occurred to me but I will not go back to miui 9 for the time being but if I do in the future I will definitely apply this method to check the volte.
Thanks for sharing this idea

Is volte working for any of you in pie roms?

Not Working
I got my redmi 4x from china ;-; works on marshmallow and goes off in nougat (miui) , Custom ROM (all nougat roms works fine with volte) but no volte in Oreo as well as in Pie.. Maybe Locked Bands

Same for me.
noticemeesenpai said:
I got my redmi 4x from china ;-; works on marshmallow and goes off in nougat (miui) , Custom ROM (all nougat roms works fine with volte) but no volte in Oreo as well as in Pie.. Maybe Locked Bands
Click to expand...
Click to collapse
Volte never worked for me on custom roms( oreo or pie). Currently on Arrow os (Pie). Tired everything but never got Volte working. It would be great relief for me if i would see volte sign on custom rom.

Mobile Network /Cell standby drain with every rom

Im writing this because my battery life got really bad, and please don't start saying it's a ROM, Google or some apps I've installed issue, because I got this problem with basically every rom, starting from stable, dev MIUI ti LOS15.1.
As you can see from the pictures I get "Mobile network standby drain" in every rom, (In MIUI is called Cell standby)
So i thought It was a firmware issue and I changed, reflashed It and formatted a lot or times but no luck.
So at this point I thought that was an Android way to tell me my battery is diying, but I don't really understand, I also got an android wearable device but this problem persisted even before I bought it.
I've also attached a bugreport
2h of screen are also good for what I got usually, other days I can reach the end of the day 20% with 1h and 30 of screen.

Seems like I solved in LOS15.1 by flashing the latest firmware from the latest dev package from xiaomi, replacing the files on the firmware flashable zip which some guy posted, but not updated it.

lukypuie said:
Seems like I solved in LOS15.1 by flashing the latest firmware from the latest dev package from xiaomi, replacing the files on the firmware flashable zip which some guy posted, but not updated it.
Click to expand...
Click to collapse
So, did it help? Please be specific what exactly did you do.

Set the principal SIM(The SIM that you use mobile data) to 4G Network mode and the secondary SIM to GSM or 2G mode.

Moto G5S Plus Unknown Baseband, IMEI No Lost & Sim Card Disabled Fix 100% | Motoroal

Moto G5S Plus Unknown Baseband, IMEI No Lost & Sim Card Disabled Fix 100% | Motoroal
Hello friends, Today I will tell you how to fix No baseband, IMEI no lost and sim card not detected on Moto G5S Plus or Any Motorola Phones. Normally this issue comes when you flashed Stock ROM on your phone or Flashed different stock ROM on your phone. After flashing your Baseband Unknown, IMEI No lost and also sim detected support not work.
So I have solution to this issue. Simple and Working Because I'm already facing this issue before on my Moto G5S Plus XT 1804 Variants. I search for a solution for this on the internet. But Nothing found anything work. But the solution is very simple. Guys, I have also EFS backup on my computer but after restore nothing happens.
So coming to our main point. How to slove no baseband, IMEI no lost and sim disable on moto g5s plus?
Follow step by step
1. The first thing you should know about it is your phone model no or variants no. In my case, I have MOTO G5S Plus XT 1804
2. Then go this Moto stock ROM website: motostockrom(.)com (remove bracket)
3. Search your model or variants no here and then simply open the post
4. Download your official stock ROM for your model or variants.
5. Then go to your computer and Install Minimal ADB And Fastboot Software & Motorola USB Driver
(While installing Minimal ADB and fastboot setup make sure create a shortcut on your desktop)
6. After that extract your Stock ROM Zip file in your Minimal ADB Fastboot folder in drive c/program filex86/minimal ADB & Fastboot folder
7. Then you have to connect your phone via USB cable to your computer or laptop after going to fastboot mode.
(For boot into fastboot mode you need to switch off your phone and press volume down+power button simultaneously)
8. If your phone connected with your system you can move to the next step.
9. check your fsatboot screen device connected or not Alway use original USB cable or Any high-quality USB cable.
10. After that click on Minimal ADB and fastboot shortcut on the desktop.
11. First, you need to check your phone is properly connected with your computer or not
12. Type- Fastboot devices
13. After that, you see some random number on your minimal adb software. its means your phone is connected
14. Not connected try again
15. Then go on your ADB and fastboot install directory drive c/program filex86/minimal ADB & Fastboot folder
16. Then find Flashfile.bat file and click on it.
17. After clicking the automatic flashing process start.
18. wait for the installation finished
19. When the process finished your phone automatically reboot and stock ROM flashed on your phone.
20. I know problem still not fixed...
21. Now connect your phone with wifi
22. Finished your setup
23. Now wait for OTA Updates | Security patch updates
24. If OTA Updates notification comes then you have to click on updates and simply download and install on your phone.
25. After reboot, I know the problem still not fixed
26. Again wait for OTA update notification and click on it and download and install it.
(If no notification goes to setting and clicks on system updates.)
27. Just install all OTA Security updates on your phone.
28. Follow this process whenever your problem not fixed.
29. when you install a 3,4 OTA security update on your phone and after reboot, your problem is finally fixed.
30. Basically this problem simply fixed by OTA updates. So u have to install all security patch update on your phone.
You can also watch my youtube video on my youtube channel (Tech Inside) or search on youtube "Moto G5S Plus Baseband Unknown Solution" My Video top on the search list.
Please give me feedback if these tips work for you. Thanks for reading

Amigo, me ha salvado la vida con esto, muchas gracias
:good::good::good::good::good::good::good::good::good::good::good:

In my case, My Moto's Radio Power went off but IMEI was not lost so I was not getting Mobile Tower Signal.
So to undo this problem, I flashed Havoc, then Derpfest, then POSP but it didn't work. So at last, I flashed Pixel Experience Rom and everything became good. Mobile Signal came again and everything was back to normal.
Someone else having this problem may do this trick. Hope they also get out of this terrifying problem.

@KaranSharmaa
.. Thanks a lot.. This worked for me.... I was trying to fix my Moto G5S Plus past 2 months and unable to get fix it...
Installed most custom roms Lineage, Havoc, Pixel experience and nothing worked.. Even installed official firmware from most websites but nothing worked... your suggestion helped... i got 5 updates and only after 5th OTA update my device is fixed.

Doesn't work man. Tried everything. The baseband is gone. The blankflash file killed it.

yuvakrishnan said:
@KaranSharmaa
.. Thanks a lot.. This worked for me.... I was trying to fix my Moto G5S Plus past 2 months and unable to get fix it...
Installed most custom roms Lineage, Havoc, Pixel experience and nothing worked.. Even installed official firmware from most websites but nothing worked... your suggestion helped... i got 5 updates and only after 5th OTA update my device is fixed.
Click to expand...
Click to collapse
How long did you wait to get the OTA update? I installed stock ROM with April security patch and it is been more than 12 hours now and no update yet!

XZ3 wifi problems

I'm just having a lot of problems withmy xperia xZ3 (H9394). In Monday, I updated google services and after that, the phone didn't connect to wifi or mobile data. I make a factory reset but it didn't work. I assumed the problem came from that update and everything will be fixed if I downgraded firmware. I tried first with sony emma flashtool, but I needed the bootload of my device to be unlocked. I unlocked it (yes, I screwed it) but emma said "no available services matched", so I tried it with newflasher and downgraded firmware, but it stayed in bootloop. So, I return to original firmware (52.1.A.3.92-R4C). It boot normally, but I have the same issues with wifi and mobile data, sometimes it works, but connects and disconnects constantly.
Someone can say me what can I do? I know that I can't relock bootloader.
@MartinX3 I know that you are a master, colud you help me?
Thanks! <3

I would look if that problem is the same on a custom ROM. (But flash on both slots and boot the latest stock first until you reach the desktop)
Or if it only happens with a specific WiFi, maybe the router need updates or a fix.

MartinX3 said:
I would look if that problem is the same on a custom ROM. (But flash on both slots and boot the latest stock first until you reach the desktop)
Or if it only happens with a specific WiFi, maybe the router need updates or a fix.
Click to expand...
Click to collapse
Thanks for reply.
What did you mean with flash both slots?
I have tried it with rom H9493_Customized CN_52.1.A.3.92-R14C, wifi and mobile data works. The problem now are the google services. I think it's a firmware problem...

crashas12 said:
Thanks for reply.
What did you mean with flash both slots?
I have tried it with rom H9493_Customized CN_52.1.A.3.92-R14C, wifi and mobile data works. The problem now are the google services. I think it's a firmware problem...
Click to expand...
Click to collapse
You have an A/B device
So you have two slots

MartinX3 said:
You have an A/B device
So you have two slots
Click to expand...
Click to collapse
Hello. I flashed again with 52.1.A.3.92-R4C custom Taiwan downloaded from xperifirm and it work for a time. First, I didn't have any issue with wifi and had 4G signal, but after hours, the problems came again and lost mobile and wifi signals. At that moment, I couldn't even activate wifi, when I turned it on it turned off immediately. For some reason, I activated airplane mode and turn on wifi and it worked, but when I turn off airplane mode, lost wifi signal. It's very strange. I think it's some problem with mobile data or something.
I will flash A/B slots. For that, I need the GSI and ASOP (Android 10.0 – Kernel 4.14 – Tama) img and I must do it with platform-tool, right? I don't need a firmware in tft?
Thanks.

crashas12 said:
Hello. I flashed again with 52.1.A.3.92-R4C custom Taiwan downloaded from xperifirm and it work for a time. First, I didn't have any issue with wifi and had 4G signal, but after hours, the problems came again and lost mobile and wifi signals. At that moment, I couldn't even activate wifi, when I turned it on it turned off immediately. For some reason, I activated airplane mode and turn on wifi and it worked, but when I turn off airplane mode, lost wifi signal. It's very strange. I think it's some problem with mobile data or something.
I will flash A/B slots. For that, I need the GSI and ASOP (Android 10.0 – Kernel 4.14 – Tama) img and I must do it with platform-tool, right? I don't need a firmware in tft?
Thanks.
Click to expand...
Click to collapse
For the custom ROMs you need to have the latest firmware on both slots and booted once until you reach your apps.
Then just follow the instructions of the XDA threads and don't forget a fullwipe.

MartinX3 said:
For the custom ROMs you need to have the latest firmware on both slots and booted once until you reach your apps.
Then just follow the instructions of the XDA threads and don't forget a fullwipe.
Click to expand...
Click to collapse
Hello again. I downloaded Android 10 GSI from https://developer.android.com/topic/generic-system-image/releases and AOSP 10 for XZ3 from https://developer.sony.com/file/download/software-binaries-for-aosp-android-10-0-kernel-4-14-tama/. I used the latest platform tools. I flashed oem_a, oem_b, system_a and system_b. After that, I did a wipe with fastboot -w command and finally reboot my device.
I checked that everything worked fine. Wifi and both sims worked fine.
After that I flashed the firmware H9493_Customized TW_52.1.A.3.92-R4C with newflasher and wiped it again. Did I do everything correctly?
Thanks.

If anyone wonders, no. It didn't work. I tried with custom roms and it was the same

I tried everything. I tried installing LineageOs, pixelsperience, Sony AOSP 10, 11, gsi 10, 11, and stock roms and nothing. Sims are detected some time, but stop after a while. i put an sd card instead of a sim card and it was not detected. I assume it is a hardware problem.
Well, thanks for helping

I'm having this exact same problem on my XZ3, thought I was going crazy but makes me think it's maybe not hardware related to find someone else with the problem...

OP7Pro & Visible Wireless

I've seen a bunch of people asking about getting the One Plus 7 Pro working on Visible Wireless network and thought I would share what has worked for me in case anyone is still looking for a solution.
Some specifics first, I have a OP 7 Pro, GM1917, that's the global version I think? YMMV
Currently running Derpfest 12, mainly because I like how android 12 looks and feels. Still looking for something better since devs haven't released an update since may.
What I have noticed is that OOS version 10.0.2 works with Visible Wireless out of the box, while later versions do not. Seems somewhere after that version that OOS updates broke Visible support.
I first noticed this because I bought the phone off swappa, wanting to upgrade from the crappy Visible Midnight I got to see if I get good service in my area. After installing a custom rom and then using MSM to reflash latest stock when something broke, Visible wasn't working. Which didn't make sense. It had worked before. right? So my thinking was that the original owner had owned the phone long enough to OTA from 10 to 11. Sure enough, downgrading to 10 and then using OTA to upgrade fixed the issue.
Tools and Guides:
EDL Recovery mode driver + Guide on how to enable unsigned drivers.
Warning! Leaving Unsigned Drivers enabled will make you system vulnerable to bad actors, virus/trojan masquerading as driver, etc. Disable Unsigned drivers after use!
How to Unbrick Your OnePlus 7 Pro Device from Dead State
In this tutorial, we have listed detailed instructions to unbrick youer OnePlus 7 Pro and bring it back from a dead state, using the MSM Download Tool.
www.droidwin.com
OOS Stock 10.0.2 Unbrick Tool MSM thingy
Index of /list/Unbrick_Tools/OnePlus_7_Pro/Global_GM21AA/Q
OOS Stock OTA update to later version of 11
OnePlus7ProOxygen_21.P.43_OTA_0430_all_2204061153_a32bd850d41a490c.zip | by tattoorepairman for OnePlus 7 Pro
Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.
androidfilehost.com
So here's my process.
Enable unsigned drivers support for your PC, download and install qualcomm EDL driver.
Backup phone, of course.
Put phone in EDL mode. Run MSM tool with guacamole_21_O.22_191107_repack
OTA update from local file, OnePlus7ProOxygen_21.P.43_OTA_0430_all_2204061153_a32bd850d41a490c.zip (Might work with latest OTA zip, havent tried.)
That will give you OOS 11, almost latest (I think there's like one more update to stable from there, but I'm lazy) with working Visible support.
Alternatively, if you want to make sure that you get legit OOS and not have to rely on zips from the internet, just let OTA update you to latest like normal, or use Oxygen Updater app.
From there, do whatever. Install TWRP, ROM, Magisk, etc.
Keep the files around somewhere so that if something goes wrong, you have everything prepared to fix it on hand.
Enjoy

I've managed to get visible sim working on all A12 roms using a few methods. Downloading an app that adds APN settings if the rom doesn't let you. Then typing in all the apn settings from this reddit post:
https://www.reddit.com/r/Visible/comments/ehdeik
For dun apn type, I used DUN all capitalized and it seems to work fine.
Then this is the key step: swapping the sim card between the two sim slots and restarting the phone repeatedly until it properly recognizes the sim card. If that doesn't work then inserting a different random sim, in my case I inserted my old tmobile sim, then taking it out and putting back the visible sim and switching sim slots if needed.
I'm using a GM1915, tmobile version that's been permenantly unlocked thanks to an xda member called mobbdeep.

right, I'd seen that, but i only have an old tacfone sim that's no longer active. does the sim have to be active for it to work? also, doesn't that need to be done every time you reboot the phone? that seems kind of annoying lol. especially since I reboot my phone sometimes like 2-3 times a day when it refuses to lock onto band 66.

b-thorn said:
right, I'd seen that, but i only have an old tacfone sim that's no longer active. does the sim have to be active for it to work? also, doesn't that need to be done every time you reboot the phone? that seems kind of annoying lol. especially since I reboot my phone sometimes like 2-3 times a day when it refuses to lock onto band 66.
Click to expand...
Click to collapse
Any old sim should work, my tmobile sim isn't active but forces my phone to change bands. It's also just a one time thing.