Database Develop

[Q] Other carriers (bring your own phone)

I have a T-mobile Note 4 that I use on Cricket/ATT but i have a few questions on what this means:
1. Some one else sim unlocked and rooted the phone so i do not have the unlock code
a. Is there any thing i can do that would some how re lock the phone (ie kies "Emergency firmware recovery" or " firmware upgrade and initialization")
i. i am currently having problems (Issue) But i am worried to do this for fear of re-locking the sim to t-mobile
2. will my phone get Os upgrades (ie Lollypop is coming) if i return it to stock and do not root it how would it get updates? OTA, KIES, Odin, ...
a. does it matter that it is not on the t-mobile network?
3. Is there any features lost by having a t-mobile phone on another carrier?

I'd look at some of these threads:
http://forum.xda-developers.com/note-4-tmobile/Unlock

logicmjn said:
I have a T-mobile Note 4 that I use on Cricket/ATT but i have a few questions on what this means:
1. Some one else sim unlocked and rooted the phone so i do not have the unlock code
a. Is there any thing i can do that would some how re lock the phone (ie kies "Emergency firmware recovery" or " firmware upgrade and initialization")
i. i am currently having problems (Issue) But i am worried to do this for fear of re-locking the sim to t-mobile
2. will my phone get Os upgrades (ie Lollypop is coming) if i return it to stock and do not root it how would it get updates? OTA, KIES, Odin, ...
a. does it matter that it is not on the t-mobile network?
3. Is there any features lost by having a t-mobile phone on another carrier?
Click to expand...
Click to collapse
1a.)You don't want the phone relocked trust me
1.i)You need to Odin Flash back to stock. It will fix the finger print lag issue. Search the General section or the Q&A section for the thread on how do to this. Also look for the CF auto root thread. To re-root your phone when u are done.
2.) You will not get the OTA if you are on AT&T, but you can just Odin flash the update once it is available, or I would just wait for a lollipop ROM to flash.
3.) You can't use the tmobile WiFi calling app or visual voicemail app that come pre-installed on the phone. But with a Google Voice number, you can get both of those features in Hangouts for free on any carrier.
Sent from my SM-N910T using XDA Free mobile app

[ROM] [STOCK] Looking for stock rom from mexico for downgrade

Hello, i've been looking everywhere and i can't get an answer, i have this moto g 2014 (XT1063, single sim) on lolipop 5.0.2, the thing is than i want to downgrade it to kitkat 4.4.4 since i've lost aprox. 2hrs of battery life, but i can't find an exact copy of the same rom i have now(lolipop) on 4.4.4, this one works with any provider except Nextel, so i can put in it a Telcel/Movistar/Iusacell sim on it and work with no problems, it didn't include any provider apps
System Version is: 22.41.16.titan_retla.retla.en.01 amxmx
Compilation number is: LBX22.99-16
Can someone tell me if such rom exists, and if not, which one should i use to downgrade it and not lose the ability to use any sim?
Phone is already Rooted and the bootloader is unlocked.

First the the ROM never lock/unlock the phone bands.
If your phone is factory unlocked and don't work with some carrier it could mean that band isn't supported
I think any titan retla.retla will work but downgrading is always risk checkout for a downgrade guide

WiFi Calling Firmware EE

Hello there XDA Members,
I have a massive problem and I hope someone in this forum is able to help me, I have an S6 Edge SM-G925F, I recently broke my phone and sent it to repair they repaired it and installed firmware that is non EE therefore I lost my WiFi Calling feature, I was like okay let me just flash the EE firmware unfortunately due to the bootloader they installed being newer then the one from the EE firmware it wont let me install (SW B: 2 K: 4 S: 4) this means that the firmware I am trying to install is older and samsung bootloader wont let me, now I want to know if there is a way I can:
1) Downgrade Bootloader or get it to accept this firmware
2)Have EE WiFI calling another way
3)Install EE WiFi calling onto the phone somehow
My phone is on version 6.0.1

Downgrade Options? SM-T710 Nougat

I have a tab s2 sm-t710 on nougat T710XXU2DQCL that was installed OTA and would like to know if i am able to downgrade to 6.0.1. The device is 100% stock and was wondering if ODIN would give me any grief about downgrading. The PDA number of the 6.0.1 file is T710XXU2CPK1 (Cellular South).
Thanks

On paper, I think you should be fine. :angel:
I'd also like to know this as battery life seemed much better on 6.0.1 for me.

i did downgrade my T 815 from 7.0m to 6.01 using odin. didnt face any difficulties. i did a complete wipe/format after i downgraded .

Can you not downgrade with TWRP as well?

Anyone knows how can I downgrade this tablet? It's in stock

Kyrat said:
Anyone knows how can I downgrade this tablet? It's in stock
Click to expand...
Click to collapse
I used Odin and firmware downloaded from sammobile and it worked flawlessly. I've performed downgrades on over 100 tablets so far and they have all worked good.

Downgrded my t713 long time ago and didn't have a single problem, you just need to download a compaitable firmware from sammobile!

Kyrat said:
Anyone knows how can I downgrade this tablet? It's in stock
Click to expand...
Click to collapse
You're safe to downgrade as long as it's allowed. Older builds will fail immediately so there is no harm to downgrade.

I've seen a few people asking about downgrading. Whats the reason behind this? Is N glitchy?

Need help downgrading SM-T719Y
Hawkhell said:
I've seen a few people asking about downgrading. Whats the reason behind this? Is N glitchy?
Click to expand...
Click to collapse
N does not work at all well with DJI drone remote controllers. I foolishly updated my brand new SM-T719Y 8" and Now I cannot connect to my drone at all. I have an pre 2016 Tab S2 on Android 6.01 and bingo works.
This size pad is the preferred size for drones and has enough grunt to provide stutter free vision. Cannot comment on anything else about N as this pad will only be used for my drone...
Yt2...

Beut said:
You're safe to downgrade as long as it's allowed. Older builds will fail immediately so there is no harm to downgrade.
Click to expand...
Click to collapse
Hi Beut,
I have been trying yo downgrade my Tab S2 SM-T719Y LTE from Nougat to 6.01 and have correct downgrade and Odin. Every time I try to downgrade it fails straight away, so I was wondering what you ment by "as long as it is allowed" & "older builds" will fail immediately.
I need to get this happening as I cant fly my drone.
Cheers Yts...

I don't have your model so it cannot verify. However, other models I can downgrade to older builds close to the Nougat.
Like SM-T580 or SM-P580, both are Android 7, QF1 and QE4 respectively. I can downgrade them to PL4 or PL2, Android 6 but not the PG1.
Q: 17 or 2017
P: 16 or 2016.
The second letter is the month it's released.
You also need the right bootloader, different OS has different bootloader. Many just flash the AP file only without bootloader, it'll failed when downgrade.

Is it possible that you cannot downgrade Nougat to 6.01 as every time I try on my SM-T719Y Tab S2 LTE, it fails straight away. I have tried 3 different downloads and all failed, but Odin will let me overwrite my Nougat with a downloaded version of Nougat from the same web location as I got one of the 6.01 firmwares from.
Here are my fail messages.
View attachment 4242043 View attachment 4242046
Is it me or is it this model of the Tab S2 SM-T719Y????

When downgrade to MM you need the BL ( Bootloader ) goes with the AP . Boot loader of Nougat is not the same as MM , however bootloader of LTE version is locked

Sammy doesn't want you to downgrade.. nougat is planned obsolescence, I'd say.

Beut said:
When downgrade to MM you need the BL ( Bootloader ) goes with the AP . Boot loader of Nougat is not the same as MM , however bootloader of LTE version is locked
Click to expand...
Click to collapse
Hey I've been trying to downgrade my T719Y for days now. Constantly failing and googling everything I can to find where I'm going wrong.
How would I know if I have the LTE version? And if I do and the bootloader is locked, does that mean I can't downgrade?
If I don't have the LTE version, you're saying I need the bootloader and AP to downgrade? Where can I find the bootloader?
I'll keep searching and trying but this is wearing me down. Any assistance would be greatly appreciated. My surveyors can't do a damn thing with our giant UAV until I fix this

LTE version is the one that has SIM, usually it's next to SD slot. Most LTE versions have locked bootloader, that's why you cannot downgrade firmware.

I just kept an older phone for apps available only for 6.0. Like scr recorder. Otherwise there are no reasons to downgrade

Stock firmware with unlocked Sprint version

Hi guys. I bought an unlocked Sprint LG V40 (V405UA). I am from Argentina and it works perfect in my country with my SIM card, but the problem is that it has the Sprint firmware and it is in Android 8.1 and it won't update if i am not with Sprint contract i think. I'd like to have the stock global firmware and get OTA updates (Android pie at least). I see a page called "lg-firmwares.com" with all models firmwares and tutorials, but i am noob in this matter and i don't want to "brick" my phone or lose the unlocked condition. If i follow the "lg-firmwares.com" tutorial and flash the Android pie firmware for my model, can i brick my phone or lock it again? or it is secure and everythink will be ok?
Thanks.

lucho888 said:
Hi guys. I bought an unlocked Sprint LG V40 (V405UA). I am from Argentina and it works perfect in my country with my SIM card, but the problem is that it has the Sprint firmware and it is in Android 8.1 and it won't update if i am not with Sprint contract i think. I'd like to have the stock global firmware and get OTA updates (Android pie at least). I see a page called "lg-firmwares.com" with all models firmwares and tutorials, but i am noob in this matter and i don't want to "brick" my phone or lose the unlocked condition. If i follow the "lg-firmwares.com" tutorial and flash the Android pie firmware for my model, can i brick my phone or lock it again? or it is secure and everythink will be ok?
Thanks.
Click to expand...
Click to collapse
Okay you have 3 ways to do this.
1st. If rooted/Unlocked Bootloader: https://forum.xda-developers.com/lg-v40/how-to/guide-crossflash-unlocked-pie-to-t3944359
2nd If rooted/Unlocked Bootloader: https://forum.xda-developers.com/lg-v40/how-to/guide-make-lg-v40-compatible-lgup-t3953120
3rd I personally haven't tried this yet: https://forum.xda-developers.com/lg-v40/development/lg-1-16-t3967559
With the 3rd one you should just simply be able to flash any KDZ but you should make sure it's compatible first.
But once you Crossflash no more OTA's you would have to download NEW KDZ and flash it over the one your on.

Ainz_Ooal_Gown said:
Okay you have 3 ways to do this.
1st. If rooted/Unlocked Bootloader: https://forum.xda-developers.com/lg-v40/how-to/guide-crossflash-unlocked-pie-to-t3944359
2nd If rooted/Unlocked Bootloader: https://forum.xda-developers.com/lg-v40/how-to/guide-make-lg-v40-compatible-lgup-t3953120
3rd I personally haven't tried this yet: https://forum.xda-developers.com/lg-v40/development/lg-1-16-t3967559
With the 3rd one you should just simply be able to flash any KDZ but you should make sure it's compatible first.
But once you Crossflash no more OTA's you would have to download NEW KDZ and flash it over the one your on.
Click to expand...
Click to collapse
First at all thanks for your reply. I have some questions for you if you can answer me.
1) is imposible for me get OTA updadates since my phone is not factory unlocked?
2) can i lose my unlocked condition if i flash other firmware?
3) is required unlock my bootloader and root my phone?
4) will all my phone data be erased if i do this?

lucho888 said:
First at all thanks for your reply. I have some questions for you if you can answer me.
1) is imposible for me get OTA updadates since my phone is not factory unlocked?
2) can i lose my unlocked condition if i flash other firmware?
3) is required unlock my bootloader and root my phone?
4) will all my phone data be erased if i do this?
Click to expand...
Click to collapse
https://forum.xda-developers.com/lg-v40/how-to/guide-lgup-root-t3967858 This Guide i made should help you with your 3rd question. That we have seen no you shouldn't loose Sim unlock if it's factory unlocked or if you carrier unlocked it for you after so many months being active with them. You always loose your data when KDZ flashing. You wont get OTA updates if you Crossflash...if you stay with your current rom OTA's should be possible

If you're using a us carrier phone outside of the us, you should just forget about ota. It won't work. Do yourself a favor and learn about the various flash methods. You're gonna need one of them at least to keep it updated.

Thanks guys. It sucks that it's imposible for me to get OTA updates, but at least i can try flashing my phone to keep it updated. I will check the guide and learn more about it then. Anyways i think this is an amazing phone and a bargain for the price nowadays..

I have android pie
lucho888 said:
Hi guys. I bought an unlocked Sprint LG V40 (V405UA). I am from Argentina and it works perfect in my country with my SIM card, but the problem is that it has the Sprint firmware and it is in Android 8.1 and it won't update if i am not with Sprint contract i think. I'd like to have the stock global firmware and get OTA updates (Android pie at least). I see a page called "lg-firmwares.com" with all models firmwares and tutorials, but i am noob in this matter and i don't want to "brick" my phone or lose the unlocked condition. If i follow the "lg-firmwares.com" tutorial and flash the Android pie firmware for my model, can i brick my phone or lock it again? or it is secure and everythink will be ok?
Thanks.
Click to expand...
Click to collapse
I SET ANDROID PIE ON MY LG V40 SPRINT ..
STEP 1 : DOWNLOAD LGUP 1. 16
STEP 2 : DRIVERS
STEP 3 : DOWNLOAD LGUP_DLL_for_V40, I COPIED LGUP_DLL_for_V40, GO TO DISC C:, PROGRAMS (86) ,FOLDER LG Electronics, LGUP,MODEL, I CREATED A FOLDER ITS NAME COMMON AND THEN PASTE LGUP_DLL_for_V40
STEP 4 : DOWNLOAD THIS FIRMWARE USA UNLOCKED V405QA720a_03_NAO_US_OP_0529.kdz
STEP 5 : FLASH IT