I bought a used Sprint M8 Not HK version
And I successfully unlocked the simlock,because I have been to China and I can use the GSM and CDMA network there.
I want to change my carrier as AT&T or T-mobile even if Version Wireless,but it just tell me the SIM Card Is Invalid !
I visited a lot of website and tried any possible solution on the Internet,include but not limite in: Change ROM,Flash Radio,Format /cache /sytem /data,Retry simlock again and again,Set QPST,Set CDMAworkstation,Set DFS ...
Well,
I even want to buy the unlock code from xxxxxx.com,but they warn me do not buy the code if the phone didn't request.
Why the phone didn't request the unlock code?
I truly hope I can unlock this phone,
If you know how to deal with it,Please help me!
I am using Sprint (maybe)original ROM,Software version 3.31.654.2,OS vision Android 4.4.4,Baseband version 1.08.20.0916
Even if you SIM unlock the phone you can't use it on another domestic carrier. If you're international that's another story.
Magnum_Enforcer said:
Even if you SIM unlock the phone you can't use it on another domestic carrier. If you're international that's another story.
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Click to collapse
But it is designed can enter the unlock code to unlock domestic carrier and international carrier.
And the domestic unlock code is actually exist,just have no idea why this phone not ask.
Maybe the unlock program damage the part of domestic unlock function?
I bought two AT&T locked LG V40 last month on eBay. I carrier unlocked one and was waiting for the unlock code for the second. I crossflashed freshly unlocked one to Unlocked ROM Pie; no issues, great experience... but this is where it goes down. I resold the completely unlocked one and proceed to flash the Pie KDZ into the STILL carrier locked AT&T! You see, I barely use data/phone services so I totally forgot I never carrier unlocked this unit.
Here's the deal. Now I have the unlock code but the firmware was not design in input an unlock code for carrier.
Is there a workaround, I'm stuck with an AT&T locked LG v40 with unlocked ROM?
Extra comments: Maybe I can flash LineageOS and find a way to input the unlock code but here is where my experience falls short.
3laws said:
I bought two AT&T locked LG V40 last month on eBay. I carrier unlocked one and was waiting for the unlock code for the second. I crossflashed freshly unlocked one to Unlocked ROM Pie; no issues, great experience... but this is where it goes down. I resold the completely unlocked one and proceed to flash the Pie KDZ into the STILL carrier locked AT&T! You see, I barely use data/phone services so I totally forgot I never carrier unlocked this unit.
Here's the deal. Now I have the unlock code but the firmware was not design in input an unlock code for carrier.
Is there a workaround, I'm stuck with an AT&T locked LG v40 with unlocked ROM?
Extra comments: Maybe I can flash LineageOS and find a way to input the unlock code but here is where my experience falls short.
Click to expand...
Click to collapse
Pretty much unless you happen to have a backup of the stock AT&T firmware? But question why didn't you just OTA to AT&T pie first?
3laws said:
I bought two AT&T locked LG V40 last month on eBay. I carrier unlocked one and was waiting for the unlock code for the second. I crossflashed freshly unlocked one to Unlocked ROM Pie; no issues, great experience... but this is where it goes down. I resold the completely unlocked one and proceed to flash the Pie KDZ into the STILL carrier locked AT&T! You see, I barely use data/phone services so I totally forgot I never carrier unlocked this unit.
Here's the deal. Now I have the unlock code but the firmware was not design in input an unlock code for carrier.
Is there a workaround, I'm stuck with an AT&T locked LG v40 with unlocked ROM?
Extra comments: Maybe I can flash LineageOS and find a way to input the unlock code but here is where my experience falls short.
Click to expand...
Click to collapse
Hi. How did you crossflashed att version to unlocked rom?
To enter unlock code try dialing 2945#*405#, a menu will appear
So I just got my sprint V40, Model Number LM-V405UA
android version : 9
Android Security Patch: March 1st 2020
And the software version is : V405U20d
Are these all up to date on my model?
______________________________________________
2nd question
What exactly is the benefit of cross flashing the phone with US unlocked KDZ or ATT Unlocked or any other KDZ?
What do you gain from doing it?
is there anything else I can do with my phone to improve it?
1) Yes.
2) & 3) More bands available to you/better compatibility for when you decide to leave Sprint for another carrier (make sure the phone is SIM unlocked first!), plus the ability to connect to more towers if you travel to other countries. Less Sprint bloatware.
4) Unlock bootloader and root device. Take full control of the tech you own!
[NG]Owner
NGOwner said:
1) Yes.
2) & 3) More bands available to you/better compatibility for when you decide to leave Sprint for another carrier (make sure the phone is SIM unlocked first!), plus the ability to connect to more towers if you travel to other countries. Less Sprint bloatware.
4) Unlock bootloader and root device. Take full control of the tech you own!
[NG]Owner
Click to expand...
Click to collapse
I dont actually have sprint, I have Tracfone as my carrier and use the AT&T sim card
which KDZ would be best to use? I looked at LG Firmware and saw US Cellular but there's also the US unlocked one too
The only information i've seen about rooting and unlocking the bootloader is to contact someone that has a octoplus box
aceofpilots said:
I dont actually have sprint, I have Tracfone as my carrier and use the AT&T sim card
which KDZ would be best to use? I looked at LG Firmware and saw US Cellular but there's also the US unlocked one too
The only information i've seen about rooting and unlocking the bootloader is to contact someone that has a octoplus box
Click to expand...
Click to collapse
If you crossflash use the US unlocked.
Look here for unlocking the bootloader.
Once you've done that, rooting is as simple as using TWRP to load Magisk.
[NG]Owner
Get the US unlocked KDZ. I also had the Sprint model. Crossflashing to the US unlocked allowed me to use wifi calling and the additional bands for T-mobile.
smokinu said:
Get the US unlocked KDZ. I also had the Sprint model. Crossflashing to the US unlocked allowed me to use wifi calling and the additional bands for T-mobile.
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i want t buy one for 150 but its sprint . but i have metro . can i just cross flash and then go to tobile n connect it or it has to be sim unlocked also
please somebody help me
Not sure you're going to find it. Att prevents lg from publishing their specific varriant of the rom. You can use the unlocked rom which does support all of the att bands for the v40 though.
Alibaba0101 said:
Not sure you're going to find it. Att prevents lg from publishing their specific varriant of the rom. You can use the unlocked rom which does support all of the att bands for the v40 though.
Click to expand...
Click to collapse
Phone was SIM locked by Att. Аll the Att's apps were disabled, so there was no message about the lock. Then phone crossflashed with US open. Now there is simply no message about entering the unlock code.
I am looking for the best way to convert my T-Mobile model to the Global version... I'm guessing via Fastboot and fastbootd mode? I've seen a few threads on here but was slightly confused as some people said it worked and some say it didn't? Please advise
Same
Careful, there's no way back unless you pay someone shady. Make sure you are fully network unlocked, because the unlock tool doesn't exist on global
The best way is to buy a global version
Buy it? Is that a thing that happens now?
craznazn said:
Careful, there's no way back unless you pay someone shady. Make sure you are fully network unlocked, because the unlock tool doesn't exist on global
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Click to collapse
Are you aware of one that works?
Loustsoul said:
Are you aware of one that works?
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No. Check out the other threads on MSM work, it's not pretty.
I've retired my op10, don't have to deal with oppo anymore
Yeah, flashing away from TMobile is possible with the full Downgrade zips iirc. But there's no way back to NE2217, so be careful. I can confirm my NE2215 works great on TMobile but I bought mine from Best Buy, fully unlocked, global edition.
EDIT: Two people have Qualcomm crash dumped now in this thread, it seems the TMO variant (NE2217) does not like to be flashed away in traditional methods.
I'm sure flashing to NE2215 wouldn't harm service, but why would you want to when NE2217 seems to get similar support for now?
Prant said:
Yeah, flashing away from TMobile is possible with the full Downgrade zips iirc. But there's no way back to NE2217, so be careful. I can confirm my NE2215 works great on TMobile but I bought mine from Best Buy, fully unlocked, global edition.
I'm sure flashing to NE2215 wouldn't harm service, but why would you want to when NE2217 seems to get similar support for now?
Click to expand...
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Dual sim and not T-Mobile bloat. Do you know where to get the full downgrade zips?
Loustsoul said:
Dual sim and not T-Mobile bloat. Do you know where to get the full downgrade zips?
Click to expand...
Click to collapse
Dual-Sim doesn't work with NE2215 from what I know, that's an NE2213/1/0 specific feature. Although NE2215 has the contacts for it, I don't think you can actually use the dual sim. Pretty sure the conclusion reached was the 2215 doesn't have a second IMEI from Manufacture.
EDIT: Just googling "OnePlus 10 Pro Downgrade Android 13 to Android 12" You'll find the full rollback zips. There's 3, NA, INDIA, and EU.
Prant said:
Dual-Sim doesn't work with NE2215 from what I know, that's an NE2213/1/0 specific feature. Although NE2215 has the contacts for it, I don't think you can actually use the dual sim. Pretty sure the conclusion reached was the 2215 doesn't have a second IMEI from Manufacture.
EDIT: Just googling "OnePlus 10 Pro Downgrade Android 13 to Android 12" You'll find the full rollback zips. There's 3, NA, INDIA, and EU.
Click to expand...
Click to collapse
What should I use in the US?
Loustsoul said:
What should I use in the US?
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Use NA in the US. But as the other's have said, you won't get dual SIM. If you have already SIM Unlocked your device and won't need to go back to 2217 for any reason, then go for it.
Is the process the same as other models?
If that is the case then why would anyone want to go back to a T-Mobile variant?
Surely the main benefit to change region would be to get timely updates and not be isolated with a rarer model.
I'm just curious as I've had carrier locked devices before and the first thing I did was to change it. In the end I sent my device off to get fixed (unrelated issue) they sent me the unlocked version for my country, I guess being rarer is prevalent not her on XDA but with oppo too.
dladz said:
It's the process the same as other models?
If that is the case then why would anyone want to go back to a T-Mobile variant?
Surely the main benefit to change region would be to get timely updates and not be isolated with a rarer model.
I'm just curious as I've had carrier locked devices before and the first thing I did was to change it. In the end I sent my device off to get fixed (unrelated issue) they sent me the unlocked version for my country, I guess being rarer is prevalent not her on XDA but with oppo too.
Click to expand...
Click to collapse
As I've stated, if you didn't unlock your SIM from T-Mobile (these come locked), you will never be able to unlock it without TMobile rom if you end up on global.
craznazn said:
As I've stated, if you didn't unlock your SIM from T-Mobile (these come locked), you will never be able to unlock it without TMobile rom if you end up on global.
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Click to collapse
So if the user isn't in the need to change sim carrier then that's fine then isn't it..
I'll ask again, is the process for changing region the same?
Bare in mind this isn't for me, I'm in the UK
craznazn said:
Use NA in the US. But as the other's have said, you won't get dual SIM. If you have already SIM Unlocked your device and won't need to go back to 2217 for any reason, then go for it.
Click to expand...
Click to collapse
Boot unlocked sim/network unlocked and rooted with magisk using the boot image for the NE2215.
craznazn said:
As I've stated, if you didn't unlock your SIM from T-Mobile (these come locked), you will never be able to unlock it without TMobile rom if you end up on global.
Click to expand...
Click to collapse
Does sim unlock and network unlock mean the same thing?
Loustsoul said:
Boot unlocked sim/network unlocked and rooted with magisk using the boot image for the NE2215.
Does sim unlock and network unlock mean the same thing?
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Click to collapse
Yep.
If it's the same as the UK, the network has to unlock the phone for you to other sims, usually in the shape of a code you enter..
May be different in the US
Bootloader unlock is a code that you have to get from Oneplus (Token) and you have to have the carrier (T-mobile) unlock the network and they are very reluctant to do it. You have to have paid off the device and have had to be a customer for some time.
Loustsoul said:
Bootloader unlock is a code that you have to get from Oneplus (Token) and you have to have the carrier (T-mobile) unlock the network and they are very reluctant to do it. You have to have paid off the device and have had to be a customer for some time.
Click to expand...
Click to collapse
Then that would be required prior to changing region... I'm not sure why the region would be a requirement to unlock the device to other networks.
May be worth asking the method used for unlocking the device to other networks.
I got them to unlock my network while I'm still paying for the device, I don't want to rock the boat. I'm sure if anyone other than the guy who did it they would lock it down again.