Database Develop

How to Sim Unlock HTC One 802d Cdma-GSM?? Need help urgently

Hi guys,
I'm from indonesia, I bought HTC 802d in china last week. Before buying, i asked the sales person specifically if both the CDMA and GSM are unlocked. They said yes they are unlocked. I only brought my roaming GSM card and it worked just fine. Didnt bring my CDMA sim.
Came back to jakarta, put in CDMA sim and it said no service. FYI, i checked the cdma freq between indonesia and china, and they share the same frequency. So, i guess that the Sim 1 CDMA slot is being carrier locked by China Telecom.
I had followed all the intructions thats available in XDA, from unlocking bootloader, flashing recovery found on chinese web, installing ROM from chinese web, got my blinkfeed working in english, facebook & twitter also worked. Even perform S-Off using moonshine.
However, the sim1 slot is still showing "No Service".
Please help me with your expert advice. I need to get the CDMA working as soon as possible as the GSM part is only running on 2G and its internet is sooooooooo slowwwwwww....:crying::crying::crying::crying:
Thank your for your time and attention

No body have any idea?

Xklusiv said:
No body have any idea?
Click to expand...
Click to collapse
I doubt I can help, here in the USA the CDMA is never locked and doesn't use a SIM card. On this side of the pond, only GSM uses a sim card. The CDMA phones that have a sim card here, is because the 4G LTE technology is a GSM, so their sim card is for LTE only.

Oditius said:
I doubt I can help, here in the USA the CDMA is never locked and doesn't use a SIM card. On this side of the pond, only GSM uses a sim card. The CDMA phones that have a sim card here, is because the 4G LTE technology is a GSM, so their sim card is for LTE only.
Click to expand...
Click to collapse
Thanks for your input :cyclops:

Xklusiv said:
Hi guys,
I'm from indonesia, I bought HTC 802d in china last week. Before buying, i asked the sales person specifically if both the CDMA and GSM are unlocked. They said yes they are unlocked. I only brought my roaming GSM card and it worked just fine. Didnt bring my CDMA sim.
Came back to jakarta, put in CDMA sim and it said no service. FYI, i checked the cdma freq between indonesia and china, and they share the same frequency. So, i guess that the Sim 1 CDMA slot is being carrier locked by China Telecom.
I had followed all the intructions thats available in XDA, from unlocking bootloader, flashing recovery found on chinese web, installing ROM from chinese web, got my blinkfeed working in english, facebook & twitter also worked. Even perform S-Off using moonshine.
However, the sim1 slot is still showing "No Service".
Please help me with your expert advice. I need to get the CDMA working as soon as possible as the GSM part is only running on 2G and its internet is sooooooooo slowwwwwww....:crying::crying::crying::crying:
Thank your for your time and attention
Click to expand...
Click to collapse
check this:http://forum.xda-developers.com/showpost.php?p=44255011&postcount=10

So did you manage to unlock it? I just bought 609d and been meaning to root and unlock also. Please tell me the chinese website you found the recovery.
Thanks.
Xklusiv said:
Hi guys,
I'm from indonesia, I bought HTC 802d in china last week. Before buying, i asked the sales person specifically if both the CDMA and GSM are unlocked. They said yes they are unlocked. I only brought my roaming GSM card and it worked just fine. Didnt bring my CDMA sim.
Came back to jakarta, put in CDMA sim and it said no service. FYI, i checked the cdma freq between indonesia and china, and they share the same frequency. So, i guess that the Sim 1 CDMA slot is being carrier locked by China Telecom.
I had followed all the intructions thats available in XDA, from unlocking bootloader, flashing recovery found on chinese web, installing ROM from chinese web, got my blinkfeed working in english, facebook & twitter also worked. Even perform S-Off using moonshine.
However, the sim1 slot is still showing "No Service".
Please help me with your expert advice. I need to get the CDMA working as soon as possible as the GSM part is only running on 2G and its internet is sooooooooo slowwwwwww....:crying::crying::crying::crying:
Thank your for your time and attention
Click to expand...
Click to collapse

@cid said:
So did you manage to unlock it? I just bought 609d and been meaning to root and unlock also. Please tell me the chinese website you found the recovery.
Thanks.
Click to expand...
Click to collapse
Sold my 802d coz cant unlock....i heard it needs special dev os to enable the cdma slot

Xklusiv said:
Sold my 802d coz cant unlock....i heard it needs special dev os to enable the cdma slot
Click to expand...
Click to collapse
Have u tried this:
http://forum.xda-developers.com/showthread.php?t=2428589
Sent from Samsung GT-I9082

Xklusiv said:
Sold my 802d coz cant unlock....i heard it needs special dev os to enable the cdma slot
Click to expand...
Click to collapse
Actually the above worked for me. After rooting and editing the build.prop the phone can connect to a CDMA network in Indonesia just fine. The only eyesore is that the carrier name doesn't show, it only shows its carrier code.

@cid said:
Actually the above worked for me. After rooting and editing the build.prop the phone can connect to a CDMA network in Indonesia just fine. The only eyesore is that the carrier name doesn't show, it only shows its carrier code.
Click to expand...
Click to collapse
Hi..I have this phone also and I used the way like above :
adb shell su setprop persist.radio.simlock.enable 0 reboot
but it only can used my gsm not my cdma..can somebody help me so I can used the cdma slot for my cdma frequency in indonesia..
in other name..the cdma slot is still lock..can somebody help me..
thanks guys

to @cid
@cid said:
Actually the above worked for me. After rooting and editing the build.prop the phone can connect to a CDMA network in Indonesia just fine. The only eyesore is that the carrier name doesn't show, it only shows its carrier code.
Click to expand...
Click to collapse
you edited the build.prop?

vlad77 said:
you edited the build.prop?
Click to expand...
Click to collapse
I did exactly as the 802d tutorial link above to sim unlock the slot 1.

to @cid
@cid said:
I did exactly as the 802d tutorial link above to sim unlock the slot 1.
Click to expand...
Click to collapse
understood, thanks
---------- Post added at 08:29 AM ---------- Previous post was at 07:53 AM ----------
vlad77 said:
understood, thanks
Click to expand...
Click to collapse
what is your firmware is on the phone?

unlock sim 609d
@cid said:
Actually the above worked for me. After rooting and editing the build.prop the phone can connect to a CDMA network in Indonesia just fine. The only eyesore is that the carrier name doesn't show, it only shows its carrier code.
Click to expand...
Click to collapse
Hi, could you show me how to cdma unlock HTC 609d? i just got this mobile from china and didnt know it is locked to china mobile

609d locked to china telecom ):
@cid said:
Actually the above worked for me. After rooting and editing the build.prop the phone can connect to a CDMA network in Indonesia just fine. The only eyesore is that the carrier name doesn't show, it only shows its carrier code.
Click to expand...
Click to collapse
I'm in China at the moment and ended up picking up one of these today (HTC DESIRE 609d) which i was told was unlocked. 1 Sim card however seems to be locked to china telecom.
You managed to remove the lock? So I need to find a special DEV rom? if so could you please send me a link or point me in the right direction? Im a bit of a noob...
Cheers, Phil.

Hi guys! I also unlocked 1-st slot but it works only GSM card. my cdma R-UIM not work for this slot. Befor unlocking first slot I edited device nam settiongs with DFS. When I put GSM card to slot one and select cdma mode, phone use setting from device and pick up signal. but not incoming and outgoing calls (because there is no registered number to carrier). But in the DFS I choose "Only R-UIM" but phone not read the R-uim card. How can I unlock first slot to use my carrier R-uim card. (my carrier PerfectumMobile-Uzbekistan)

[Q] Using 4G on Sprint HTC One when GSM is enabled

Hello,
I recently acquired from ebay a used Sprint HTC One M7 for cheap because the guy couldn't unlock it.
I followed all the tutorials and guides here, and got the phone unlocked, TWRP recovery and SuperSU flashed, S-OFF, and a custom rom (Viper) flashed on it successfully.
I am from France and my network operator is Free.fr. I used both the *#*#4636#*#* and the Mobile settings to enable GSM and the phone, SMS, and 3G data are all working properly.
However, my operator allows for 4G LTE as well and I would like to use it if possible, while retaining the use of the Phone itself (making calls, texts etc).
The way it works for Free.fr is that I have to login on their website, and enable 4G manually. The server will then check if my phone has 4G LTE compatibility and enable it if it does, but everytime I try it tells me my phone is not 4G ready.
Is there anyway to do this? A guide or tutorial out there perhaps?
edit: more info:
It seems I need 2600 MHz frequency for 4G to work with my operator, could it be that the Sprint version cannot handle this? Any solutions?

m2smoe said:
Hello,
I recently acquired from ebay a used Sprint HTC One M7 for cheap because the guy couldn't unlock it.
I followed all the tutorials and guides here, and got the phone unlocked, TWRP recovery and SuperSU flashed, S-OFF, and a custom rom (Viper) flashed on it successfully.
I am from France and my network operator is Free.fr. I used both the *#*#4636#*#* and the Mobile settings to enable GSM and the phone, SMS, and 3G data are all working properly.
However, my operator allows for 4G LTE as well and I would like to use it if possible, while retaining the use of the Phone itself (making calls, texts etc).
The way it works for Free.fr is that I have to login on their website, and enable 4G manually. The server will then check if my phone has 4G LTE compatibility and enable it if it does, but everytime I try it tells me my phone is not 4G ready.
Is there anyway to do this? A guide or tutorial out there perhaps?
edit: more info:
It seems I need 2600 MHz frequency for 4G to work with my operator, could it be that the Sprint version cannot handle this? Any solutions?
Click to expand...
Click to collapse
Yeah :/ the Sprint HTC One only supports the 1900MHz for LTE. There aren't any solutions afaik, unless you might want to do a hardware mod, and doing hardware mods on an One is near-impossible.. so you're out of luck.

StormyNight said:
Yeah :/ the Sprint HTC One only supports the 1900MHz for LTE. There aren't any solutions afaik, unless you might want to do a hardware mod, and doing hardware mods on an One is near-impossible.. so you're out of luck.
Click to expand...
Click to collapse
Ah well, that's alright, at the price I got it for it's still worth it even without 4G. Thanks for the reply!

m2smoe said:
Ah well, that's alright, at the price I got it for it's still worth it even without 4G. Thanks for the reply!
Click to expand...
Click to collapse
Hi, could you share your experience of sim unlock the device?
my phone is on 1.57 hboot. I s-off it and RUU to 1.19 firmware. Android 4.1.2. Then I install latest TWRP and Super SU 2.0
Then I download the "sprint htc one sim unlock helper" , select sim unlock.
phone reboot. select " GSM/WCDMA/LTE auto" in *#*#4636#*#*"
Now when I insert my AT&T sim card. it pop up to select carreir, I choose "AT&T", I also choose "GSMUMTS only" in network moode. Also set up ATT APN.
now iin Phone indentity, I could see my phone number,
But there is no signal for the phone at all...
Could you told me your way of doing the sim unlock? Thanks.

laofan said:
Hi, could you share your experience of sim unlock the device?
my phone is on 1.57 hboot. I s-off it and RUU to 1.19 firmware. Android 4.1.2. Then I install latest TWRP and Super SU 2.0
Then I download the "sprint htc one sim unlock helper" , select sim unlock.
phone reboot. select " GSM/WCDMA/LTE auto" in *#*#4636#*#*"
Now when I insert my AT&T sim card. it pop up to select carreir, I choose "AT&T", I also choose "GSMUMTS only" in network moode. Also set up ATT APN.
now iin Phone indentity, I could see my phone number,
But there is no signal for the phone at all...
Could you told me your way of doing the sim unlock? Thanks.
Click to expand...
Click to collapse
I did exactly what you did and I had signal. I am from France so I don't know about AT&T though. With my French operator it works fine now.

m2smoe said:
I did exactly what you did and I had signal. I am from France so I don't know about AT&T though. With my French operator it works fine now.
Click to expand...
Click to collapse
That is weired. thanks for your reply though.

Any rom that support Moto X CDMA XT1093?

Well im thinking on converthing this phone to XT1095 and use lollipop or use a custom rom with lollipop.
The question is, if i flash any other rom, will i be able to use on cdma still?

bump

As long as the ROM doesn't contain any modem files you'll be fine. I believe that most custom ROMs are only /system and some /data, which means they'll work fine.

yunior597 said:
Well im thinking on converthing this phone to XT1095 and use lollipop or use a custom rom with lollipop.
The question is, if i flash any other rom, will i be able to use on cdma still?
Click to expand...
Click to collapse
Has there been any luck getting the US Cellular XT1093 to work with a custom ROM?

ctsdad said:
Has there been any luck getting the US Cellular XT1093 to work with a custom ROM?
Click to expand...
Click to collapse
i have xt 1093 with lollipop from ota.
1 unblock bootloader (with motorola site)
2 root
3 adb sideload kitkat from xt1095 (tmobile vesion)
4 update to lollipop from OTA
Sorry for my english

Hello guys, i could activate this phone on another cdma carrier, for the moment its the only ooption since we cant unlock gsm.

yunior597 said:
Hello guys, i could activate this phone on another cdma carrier, for the moment its the only ooption since we cant unlock gsm.
Click to expand...
Click to collapse
Actually, you'll only be able to activate it on US Cellular, not just any CDMA carrier. Sprint doesn't carry the phone and Verizon won't allow you to use it on their network. US Cellular won't let you use it on any other network either, as evidenced by their inability/unwillingness to provide unlock codes.
Edit: in the US, that is. Globally you'd have to get the carrier to modify the phone for you, which may be possible but I don't know about that stuff.

borxnx said:
Actually, you'll only be able to activate it on US Cellular, not just any CDMA carrier. Sprint doesn't carry the phone and Verizon won't allow you to use it on their network. US Cellular won't let you use it on any other network either, as evidenced by their inability/unwillingness to provide unlock codes.
Edit: in the US, that is. Globally you'd have to get the carrier to modify the phone for you, which may be possible but I don't know about that stuff.
Click to expand...
Click to collapse
I think you don't understand im already using this phone (xt1093) on another cdma carrier... i live in dominican republic and switched to tricom, sadly can only use 3G in cdma since 4G LTE is gsm.

Can you write some details how can downgrade from OTA updated system 5.1 to 5.0.2 ?

borxnx said:
As long as the ROM doesn't contain any modem files you'll be fine. I believe that most custom ROMs are only /system and some /data, which means they'll work fine.
Click to expand...
Click to collapse
Flashed custom to my CDMA XT1093 and even after reflashing stock files, I have not gotten my data signal back. Three weeks now with no mobild data or multimedia messages

rooster1973 said:
Flashed custom to my CDMA XT1093 and even after reflashing stock files, I have not gotten my data signal back. Three weeks now with no mobild data or multimedia messages
Click to expand...
Click to collapse
http://teamuscellular.com/Forum/topic/8745-help-refusing-to-activate-after/
check it out. That guy got it working. Also, US Cellular isn't supported on XDA, hence why we have our own forum.

[GUIDE] LGUP for all (no root needed)

Greetings everyone, i go by the name Ainz Ooal Gown. Here i bring you the Official Guide on LGUP to fix a Brick of your device or to simply Cross flash/Upgrade your device from Windows.
First things first if you try this and end up with a brick or your device transforms and tries to take over the world; it's not my fault you messed up not me. So just read all of this thread not just the O.P to, and get out of a bind if you reply with "the thread is too long i wont read it please help" don't expect anything short of "there's a search bar use it"
Second things have changed cross flashing no longer unlocks your Sim capabilities, you must contact your Carrier to have your Sim unlocked. The only other thing you can do is buy the US Unlocked model and root that one.
Third and i can't believe i must add this those of you who have a T-Mobile V40 if you flash a T-Mobile KDZ you'll be fine....if you flash any other KDZ enjoy and expensive Paper weight.
Download These FIles: DLL LGUP UI_Config
No root:
Step 1. Install the provided LGUP.msi (you should now have C:\Program Files (x86)\LG Electronics\LGUP)
Step 2. Install the provided DLL (you should now have C:\Program Files (x86)\LG Electronics\LGUP\model\Common)
Step 3. Extract the LGUP_UI_Config_m250n_[cxz].zip file anywhere on your computer, then copy or move the file to the common folder (the same one the DLL installs too)
Step 4. Enter download mode and flash any KDZ that is compatible with your device with the Refurbish or Upgrade options.
With root:
If you're rooted and BL unlocked, ALWAYS use Partition DL unless you want to go completely unrooted/bootloader relocked.
Download the previous files and LGUPCompatableLAF
Make sure your using fastboot with USB 2.0, it may work with 3.0 but it's better to use 2.0
Step 1. Extract the LGUPCompatibleLAF.rar file anywhere on your computer.
Step 2. Put your phone in fastboot mode. If on Oreo, just power off and hold vol down while plugged in, if on PIE Power off press vol up, while plugged in.
Step 3. In Windows 10 right click the start button and choose either "Command Prompt" or "Command Prompt(Admin)"
Step 4. In the command prompt type cd followed by where you extracted the rar for me it's "cd C:\Users\juanj\Downloads\Flash\LGUPCompatableLAF" ( Windows 7 and older simply when in the extracted folder Hold Shift on your keyboard and right click and choose "open a command prompt here" ).
Step 5. We need to get into the V35 Engineering bootloader, run this command: fastboot.exe set_active b and press enter. (If your on Oreo and have V35 bootloader in Slot_a skip this step.)
Step 6. Reboot, and it should boot straight into the v35 eng if you were already on PIE.
Step 7. Run this command to flash the LGUP Compatible LAF: fastboot.exe flash laf_a laf.img press enter.
Step 8. Now, we need to get back to our A slot, run: fastboot.exe set_active a (again Skip if your already on Oreo with V35Bootloader in Slot_a).
Step 9. Reboot by pressing and holding vol down and power while your device is plugged in (let go of the power button and volume down button and now press and hold vol up before the LG Logo shows up). You should be in download mode and LGUP will work.
Step 10. follow the non root part but use Partition DL, Select all and uncheck abl_a and laf_a to keep the bootloader unlocked in Slot_a then abl_b and laf_b to keep V35 Fastboot access in Slot_b.
Thanks to: @CXZa @maxmotos @Xsavi

"UI_Config.lgl" file for V40
Hello All,
Please find attached an archive containing the "UI_Config.lgl" file for V40 retrieved and modified based on instructions from @CXZa ( @CXZa, thanks a lot for the great job done!).
Instructions:
***
1. Copy the "UI_Config.lgl" file into "*\LGUP\Common" folder
2. Change the file's properties and make it "Read-only" (should already be there)
3. Ignore the "can't open new file" warning by LGUP 1.16
***
Hope this help!

taronhov said:
Hello All,
Please find attached an archive containing the "UI_Config.lgl" file for V40 retrieved and modified based on instructions from @CXZa ( @CXZa, thanks a lot for the great job done!).
Instructions:
***
1. Copy the "UI_Config.lgl" file into "*\LGUP\Common" folder
2. Change the file's properties and make it "Read-only" (should already be there)
3. Ignore the "can't open new file" warning by LGUP 1.16
***
Hope this help!
Click to expand...
Click to collapse
I will add this bit to the OP.....

Works perfectly!

pp342261 said:
Works perfectly!
Click to expand...
Click to collapse
Just so others know were you rooted before this?

Ainz_Ooal_Gown said:
Just so others know were you rooted before this?
Click to expand...
Click to collapse
yes, bl unlocked also :good:

Thanks for posting this. Can we use this to flash any v405 rom (except tmobile) to any lg v405 v40 phone without 9008 mode?
Can we not flash twrp to recovery for the lg v40 as opposed to using the laf partition? I got a copy of twrp.img from vlad for the v40 which looks like was created by Precious Princewill. I haven't tried it yet. Frankly want to make sure there is a working lg up in case i lose recovery. Also not sure how twrp works with PIE. Does it allow you to flash to both slot a or slot b?

Posts like this sometimes makes me wish I didn't get bl unlocked and root.. So much simpler. With lack of anything really interesting to test and play with like crossflashing on the V30 for example, I can't find the motivation to actually do any of this..

neocyke said:
Posts like this sometimes makes me wish I didn't get bl unlocked and root.. So much simpler. With lack of anything really interesting to test and play with like crossflashing on the V30 for example, I can't find the motivation to actually do any of this..
Click to expand...
Click to collapse
if you have TWRP installed i'm currently uploading a Backup with No data of a GSI i have working on the V40

Alibaba0101 said:
Thanks for posting this. Can we use this to flash any v405 rom (except tmobile) to any lg v405 v40 phone without 9008 mode?
Can we not flash twrp to recovery for the lg v40 as opposed to using the laf partition? I got a copy of twrp.img from vlad for the v40 which looks like was created by Precious Princewill. I haven't tried it yet. Frankly want to make sure there is a working lg up in case i lose recovery. Also not sure how twrp works with PIE. Does it allow you to flash to both slot a or slot b?
Click to expand...
Click to collapse
TWRP lets you Flash on the current active Slot, But the current Lineage OS we're working on flashes to the non active Slot for some reason.

Ainz_Ooal_Gown said:
TWRP lets you Flash on the current active Slot, But the current Lineage OS we're working on flashes to the non active Slot for some reason.
Click to expand...
Click to collapse
ThanksQ
Does the current twrp allow backup and restore of the active slot? And how can i tell which is the active slot? Is there a different recovery for each slot? I haven't even looked at what the partition scheme looks like with pie yet.

Alibaba0101 said:
ThanksQ
Does the current twrp allow backup and restore of the active slot? And how can i tell which is the active slot? Is there a different recovery for each slot? I haven't even looked at what the partition scheme looks like with pie yet.
Click to expand...
Click to collapse
yes you can have the older TWRP 3.3.0-0 in one slot and the newer TWRP 3.3.1-0 in the other but you can check your active slot in the reboot section of TWRP

Ainz_Ooal_Gown said:
if you have TWRP installed i'm currently uploading a Backup with No data of a GSI i have working on the V40
Click to expand...
Click to collapse
You know what, I never actually checked whether mine came with TWRP or not (again lack of stuff to flash). Prolly worth a look see.
GSI huh. Would be great if it'd work properly. My local carrier uses bands that US phones don't enable / use which is why all my LG phones run Korean fw. Those are the only ones that play nice, otherwise it's wifi-only-land fer me.
This is one peculiar thing I've noticed with LG phones so far. Even if the phone hw itself supports every single band under the sun (like me old V30), running certain regional fw disables some of them. Specific to the V30 : Logic dictates that you can go into service mode and enable those and alls good yeah? But no, not with LG. You do that, it then locks you onto those bands never auto-switching anymore. Which sucks when you swap sims or roam on other networks. Like.. dude.. WTH??

Successfully crossflashed at&t 8.1 into Korean 9.0. Thanks!

suderujn said:
Successfully crossflashed at&t 8.1 into Korean 9.0. Thanks!
Click to expand...
Click to collapse
Hello, did you do refurbished?

Inerent said:
Hello, did you do refurbished?
Click to expand...
Click to collapse
yep

neocyke said:
You know what, I never actually checked whether mine came with TWRP or not (again lack of stuff to flash). Prolly worth a look see.
GSI huh. Would be great if it'd work properly. My local carrier uses bands that US phones don't enable / use which is why all my LG phones run Korean fw. Those are the only ones that play nice, otherwise it's wifi-only-land fer me.
This is one peculiar thing I've noticed with LG phones so far. Even if the phone hw itself supports every single band under the sun (like me old V30), running certain regional fw disables some of them. Specific to the V30 : Logic dictates that you can go into service mode and enable those and alls good yeah? But no, not with LG. You do that, it then locks you onto those bands never auto-switching anymore. Which sucks when you swap sims or roam on other networks. Like.. dude.. WTH??
Click to expand...
Click to collapse
This has been true of almost every manufacturer now. There are no truly unlocked world phones, at least not in the US. Each firmware is locked to the bands for that carrier with little to no ability to cross flash the radios or enable bands. I have at&t in the USA and they have some sort of deal with most carriers that don't allow their firmware to be posted and their phones are all bootloader locked. You can cross flash them and get the bootloader unlocked, but you will always lose a few bands.
The LG v40 US unlocked firmware appears to have more bands than most (v405qa) which is what i cross flashed to my lg v40. It supports:
LTE Bands: 1/2/3/4/5/7/8/12/13/14/17/20/25/26/28/29/30/38/39/40/41/46/66/71;
WCDMA Bands 1/2/4/5/8;
GSM 850/900/1800/1900 MHz; 800 MHz
CDMA; 1.9 GHz CDMA PCS; Secondary 800 MHz CDMA
https://www.lg.com/us/cell-phones/lg-V405QA7-unlocked-v40
Although after cross flashing this rom, my phone firmware still show v405ua model#. So I'm not sure that it fully has worked or if the v405qa is just a varation of the v405ua rom.

Alibaba0101 said:
This has been true of almost every manufacturer now. There are no truly unlocked world phones, at least not in the US. Each firmware is locked to the bands for that carrier with little to no ability to cross flash the radios or enable bands. I have at&t in the USA and they have some sort of deal with most carriers that don't allow their firmware to be posted and their phones are all bootloader locked. You can cross flash them and get the bootloader unlocked, but you will always lose a few bands.
The LG v40 US unlocked firmware appears to have more bands than most (v405qa) which is what i cross flashed to my lg v40. It supports:
LTE Bands: 1/2/3/4/5/7/8/12/13/14/17/20/25/26/28/29/30/38/39/40/41/46/66/71;
WCDMA Bands 1/2/4/5/8;
GSM 850/900/1800/1900 MHz; 800 MHz
CDMA; 1.9 GHz CDMA PCS; Secondary 800 MHz CDMA
https://www.lg.com/us/cell-phones/lg-V405QA7-unlocked-v40
Although after cross flashing this rom, my phone firmware still show v405ua model#. So I'm not sure that it fully has worked or if the v405qa is just a varation of the v405ua rom.
Click to expand...
Click to collapse
It will always show your base model

Ainz_Ooal_Gown said:
It will always show your base model
Click to expand...
Click to collapse
Is this different than the v30 then? After cross flashing us998 on my sprint v30, it now shows us998 as the model#.

Alibaba0101 said:
Is this different than the v30 then? After cross flashing us998 on my sprint v30, it now shows us998 as the model#.
Click to expand...
Click to collapse
Sorry serial number should always be the same but flashing US Unlocked KDZ which is a V405QA doesn't change the Sprint V405UA to a QA....i forget if it was different on the V30 or not

Is it possible to change S20 FE G781B to G781U?

I was wondering if it is possible to flash G781U firmware on G781B since they have the same specs.
would love to hear what you think (or know).
Thanks

I'd keep the B model as it is as it can have it's bootloader unlocked. if you're taking that phone to the states someone would gladly buy it off you as is.
if you wanted updates after moving they could easily be manually downloaded and flashed. if you concerned about frequency bands then maybe there are ways to tackle that.

3mel said:
I'd keep the B model as it is as it can have it's bootloader unlocked. if you're taking that phone to the states someone would gladly buy it off you as is.
if you wanted updates after moving they could easily be manually downloaded and flashed. if you concerned about frequency bands then maybe there are ways to tackle that.
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Thanks for the reply, I know its better to keep it that way but if I wanted to change it anyway, will it be possible or would I just brick the phone?

idaneli2 said:
Thanks for the reply, I know its better to keep it that way but if I wanted to change it anyway, will it be possible or would I just brick the phone?
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not sure to be honest, I suspect that the existing bootloader would generate a fail error before or just after you started but I can't say for sure.
if it did fail after starting to flash you'd need B firmware on hand to make it useable again.

Trying the same but switching from 781W to 781B. Had no success so far. Odin is failing to flash. At least so far I did not brick the device. Any advice is welcome

igordashaar said:
Trying the same but switching from 781W to 781B. Had no success so far. Odin is failing to flash. At least so far I did not brick the device. Any advice is welcome
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Hey, glad to see im not alone.
did you try to unlock the bootloader first?

idaneli2 said:
Hey, glad to see im not alone.
did you try to unlock the bootloader first?
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tried, but so far without success. I'm missing the "OEM unlocking" option that is stated in the manual. Trying now to update to latest firmware. Maybe this will enable the unlocking option.

hm... I just learned that there may be no OEM unlocking option on my snapdragon device. There really is a lot to consider... Somehow OEM unlocking does not work on snapdragon devices from north america. In latin america although this might work. I don't really get what the point of all this is. [some sauce]
edit: maybe it is possible to unlock it through fastboot, but so far i only get a command not found error when using ´´´fastboot oem unlock´´´

igordashaar said:
hm... I just learned that there may be no OEM unlocking option on my snapdragon device. There really is a lot to consider... Somehow OEM unlocking does not work on snapdragon devices from north america. In latin america although this might work. I don't really get what the point of all this is. [some sauce]
edit: maybe it is possible to unlock it through fastboot, but so far i only get a command not found error when using ´´´fastboot oem unlock´´´
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Yeah, from what I understand devices with U at the end of their model number are missing the OEM unlocking option. I think its stupid to only block the option to some of the world, I mean either block it completely or dont block it at all.
Maybe it is possible to change your model to W and then unlock it, I im not wrong you are supposed to be able to flash W firmware on your U device without unlocking the bootloader.
Just make sure you download firmware with the same binary number in the baseband (the fifth number from the right)

igordashaar said:
tried, but so far without success. I'm missing the "OEM unlocking" option that is stated in the manual. Trying now to update to latest firmware. Maybe this will enable the unlocking option.
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if it was that easy everyone would be doing it... (if they couldn't unlock).

idaneli2 said:
Yeah, from what I understand devices with U at the end of their model number are missing the OEM unlocking option. I think its stupid to only block the option to some of the world, I mean either block it completely or dont block it at all.
Maybe it is possible to change your model to W and then unlock it, I im not wrong you are supposed to be able to flash W firmware on your U device without unlocking the bootloader.
Just make sure you download firmware with the same binary number in the baseband (the fifth number from the right)
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Click to collapse
Unlike the original poster I am trying to go from SM-G781W to SM-G781B (or anything else that has german language).
To my understanding Samsung does this as the carriers in North America are requiring it, but not sure why.