POSSIBLE TO UNLOCK FROM CARRIER USING FASTBOOT/ADB? - Google Pixel 4a Questions & Answers

i have the unlock codes provided by the carrier to unlock my phone however, when i dial #tfunlock# nothing happens. so i wasn wondering if it was possible to do it through fastboot. im sorry im an obvious noob. but have experience with fastboot/adb.

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Tips/Help with Network/SIM Unlock Problem

EDIT: Nevermind, I called ATT to double check and they gave me a different code that worked. Sorry for the post.
I know this gets asked alot, but the information, situations, and answers out there are so many it is difficult to determine what needs to be done, so I am hoping someone can at least point me in the right direction.
I had unlocked my bootloader using htcdev, installed 4ext recovery, and flashed latest Cyanogenmod. I have been wanting to switch to T-mobile (I know about the possibility of not having 4g with that) and come to find out, entering the Network PUK code doesnt work in Cyanogen..
I gleaned that I needed to re-flash stock rom and then try to unlock, but I did this, and it still isnt accepting the code, argh. Do I need to relock my bootloader or do anything special? I got this code straight from ATT. With the ATT SIM in the phone, it doesnt ask for it, I restart phone with my T-mobile SIM in, and it asks for the code, but always says its incorrect. How is it checking this anyway, as it doenst seem to be communicating over the mobile network.
Any ideas would be much appreciated, thanks.

[Q] Will I lose unlock if I install a new ROM?

Hello, my name is Armando. This is my first post here, and I only have one question. First of all I want to say thanks to all you guys, I've found a lot of useful stuff here for my phone Ok, let's go for it:
I recently unlocked my Huawei Y511 to use it on any carrier, and it was succesful (I didn't unlock it by myself, a repairman did it). The problem is... my phone still got all the original carrier stuff (boot animation, some crappy apps and sounds) and I want to delete all of them. I rooted my phone before the unlock (temporary root which I found in this same forum: http://forum.xda-developers.com/showthread.php?t=2130276) and I leave all the stock ROM untouched before the unlock. I noticed that the guy who unlocked it used a "unlock box" named "SigmaBox" and he told me that my phone was able to be unlocked directly, without needing to wipe and reinstall all the software (I give him the phone, then one hour later I have my phone all unlocked, and it was the same way it was before it).
Now my question is... if I install a new ROM or whatever... will I lose my sim unlock?
I don't understand how he unlocked the phone, all I know is that he did a "direct unlock" but I don't know if he used unlocking codes. All I know is that he used some kind of USB box connected from my phone to a computer, and did his magic and surprise, phone unlocked.
Do you know what kind of unlock is this? And how does it work?
PD: Sorry for my bad english, my native language is spanish but I'm trying to improve my english skills (so I didn't use a translator).
I don't know much about unlocking. But I'm pretty sure that you won't loose the unlock status if you flash custom rom
Sent from my LG-E610 using xda app-developers app
atulkris said:
I don't know much about unlocking. But I'm pretty sure that you won't loose the unlock status if you flash custom rom
Sent from my LG-E610 using xda app-developers app
Click to expand...
Click to collapse
Thanks for your reply, and yeah, I think you are right.
After doing a little research, I found that a "direct unlock" is basically the generation and input of unlocking codes generated by both IMEI and carrier code, and the unlock box generated three codes which only one of them worked and the phone gets unlocked. So, my phone is
unlocked for ever and I won't lose my unlock status even if I install/update/reinstall the ROM.
If any of you guys know something else about this unlock procedure, please let us know!

How bypass TMobile Unlock App & get Prompt to enter Network Unlock Code / IMEI unlock

How bypass TMobile Unlock App & get Prompt to enter Network Unlock Code / IMEI unlock
Can't seem get the phone to prompt for to Enter Network Unlock Code or IMEI unlock input anywhere after I put a different carrier sim or invalid sim. Is there anyway we can bypass the 3rd Party Tmo Unlock App or get the phone to bypass to enter the network unlock code? The phone is already Rooted running on various ROM such as Darthstalker, Resurrection and Dr, Ketan L2 and also Rooted Stock ROM, but noting seem to get the sim to prompt to enter network unlock. Try Build.Prop nothing there...so far. Try Deleting sys file, apk and other Efs nothing work.... Do I need to change or install a new Baseband/Radio/Modem?
Its built into the T-Mobile based roms if I'm not mistaken. If you flashed an international rom I would think it would go away and you could get the standard unlock prompt. Thats how others have done it in the past. They flashed MetroPCS roms and then unlocked and then flashed back. Make sure its safe to flash an international rom first (even if only temporary).
Has anyone been able to try this successfully?
HJJkid0131 said:
Has anyone been able to try this successfully?
Click to expand...
Click to collapse
Has no one been able to bypass this stupid iPhone-iCloud-like BIG BROTHER unlock stopper??? I can't enter the network unlock code because there in no prompt for it!
how to input unlock code if not promoted to with invalid sim..
Samo+Pro said:
Can't seem get the phone to prompt for to Enter Network Unlock Code or IMEI unlock input anywhere after I put a different carrier sim or invalid sim. Is there anyway we can bypass the 3rd Party Tmo Unlock App or get the phone to bypass to enter the network unlock code? The phone is already Rooted running on various ROM such as Darthstalker, Resurrection and Dr, Ketan L2 and also Rooted Stock ROM, but noting seem to get the sim to prompt to enter network unlock. Try Build.Prop nothing there...so far. Try Deleting sys file, apk and other Efs nothing work.... Do I need to change or install a new Baseband/Radio/Modem?
Click to expand...
Click to collapse
Use "shortcut master lite" or paid version its up to you..from app store and launch the 7465625 codes press the ones that show perso <android_unlock_code it should bring up what u need..hope this helps someone. .?I have the core prime from metro..and it works to let me put in the code..only I don't have the code..☺I found out about this app when I had the S5..
I
It can't be avoided. You must unlock through the app. If you install a custom ROM, and are able to get an unlock prompt from the phone, the code you buy over the internet will not work. You are best to go through the unlocking tools which cost between 25-30 and will let you unlock it with the T-mobile app.
Dude here can unlock it for free. Search the forum. Title "Sim unlock - domestic and international"
Here's the link for that.
http://forum.xda-developers.com/showthread.php?t=3196964
No Unlock Code needed
Samo+Pro said:
Can't seem get the phone to prompt for to Enter Network Unlock Code or IMEI unlock input anywhere after I put a different carrier sim or invalid sim. Is there anyway we can bypass the 3rd Party Tmo Unlock App or get the phone to bypass to enter the network unlock code? The phone is already Rooted running on various ROM such as Darthstalker, Resurrection and Dr, Ketan L2 and also Rooted Stock ROM, but noting seem to get the sim to prompt to enter network unlock. Try Build.Prop nothing there...so far. Try Deleting sys file, apk and other Efs nothing work.... Do I need to change or install a new Baseband/Radio/Modem?
Click to expand...
Click to collapse
You DON"T need an Unlock code for these new Samsung Tmobile phones.
If the phone has been paid off for over 30 days then you can use the free "Tmobile Device Unlock" app to unlock
it and if the phone is STOCK and no one deleted the unlock app it should be in the app drawer of the phone.
If the "Device Unlock" app is not in the app drawer then you can simply download it from the playstore.
To unlock it with the unlock app it only takes one click.
The Device Unlock app will NOT ask for any codes at all it only asks if you want temporary or permanent unlock.
Here is the direct playstore link for the Tmobile Device Unlock app in case you need it.
https://play.google.com/store/apps/d....simlock&hl=en
Here is Tmobile's "Device Unlock" step by step instruction link in case you need it:
https://support.t-mobile.com/docs/DOC-14011
I unlocked my Tmobile S6 Edge+ and when I go into Settings>Mobile networks and click on
"Network operators" then click "Search Now" it displays Tmobile, AT&T and Verizon as options.
P.s. If the Unlock Device app does NOT unlock your phone it means that it's either not paid off or it has been stolen. (Blacklisted)
Good luck,
Have a great day!
Or, you can use a third party unlocking service like UnlockRadar.com. Here is a link: https://www.unlockradar.com/service/t-mobile-usa-device-unlock-app-official-unlock
In need of help!!! I have a tmobile note 5 can you unlock it please
wdkingery said:
Dude here can unlock it for free. Search the forum. Title "Sim unlock - domestic and international"
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Click to collapse
Can you help me with unlocking my Note 5 the carrier is tmobile
vd
obliviousmnd said:
Please everyone do NOT pay for a SIM unlock. I will do it for free. You're welcome to donate after if you want to be nice but it's not required. Please message me on hangsouts. [email protected]. do not email me please, message on hangouts, I will ignore emails.
Click to expand...
Click to collapse
You are a lier
i try many times to contact you but never answer..
dont promisse something you wont do it...
Here's my question on this topic. I have flash numerous rims on my TMO note5 and the device unlock app just says it is incompatible and stops there. I know when I put completely stock note5 that I have used the unlock app and it successfully unlocked the phone. After I flashed the rims, the app does not work but I also loose unlock. Anyone else have this issue or know what to do to get unlock back with a custom rom?
TEXASTRYKER said:
You are a lier
i try many times to contact you but never answer..
dont promisse something you wont do it...
Click to expand...
Click to collapse
Hey. I am sorry i cannot drop everything I am doing to perform a FREE service for you. gtfoh with that entitlement garbage. I do this for people when i'm at my computer when they write me. I go to school full time and hold a full time job. PAY SOMEONE to unlock your phone if you need immediate service. ffs you're the type of person that ruins free services for everyone.
obliviousmnd said:
Hey. I am sorry i cannot drop everything I am doing to perform a FREE service for you. gtfoh with that entitlement garbage. I do this for people when i'm at my computer when they write me. I go to school full time and hold a full time job. PAY SOMEONE to unlock your phone if you need immediate service. ffs you're the type of person that ruins free services for everyone.
Click to expand...
Click to collapse
Sadly this is true! The people who think they are entitled to everything and anything are ruining a lot of stuff for everyone else! A lot of devs just gave up and left because of people like this and crybabies who don't read first before doing something to their phone and then suddenly their incompetence is somehow the devs fault!? People need to grow up already.. Seriously!
DriftorX said:
Here's my question on this topic. I have flash numerous rims on my TMO note5 and the device unlock app just says it is incompatible and stops there. I know when I put completely stock note5 that I have used the unlock app and it successfully unlocked the phone. After I flashed the rims, the app does not work but I also loose unlock. Anyone else have this issue or know what to do to get unlock back with a custom rom?
Click to expand...
Click to collapse
I'm having the same issue with mine.
Im on a t mobile v10 and managed to get promted to enter a sim network unlock pin but i dont know how to actually get the network unlock code already tried asking the unlocking services ppl and they just refuse to belive you can actually get prompted to enter code.
I have a new ZTE z981 I have obtained a unlock code but how do I get the phone to prompt to enter the said code
Your wrong I got the T-mobile Galaxy S8 to ask for network unlock code

Unlocking Samsung S8+ Xfinity Mobile

Please How can I unlock my Samsung S8+ Locked with Xfinity Mobile to any Carrier. Has anybody done it before and successful. Thank you
jueda1992 said:
Please How can I unlock my Samsung S8+ Locked with Xfinity Mobile to any Carrier. Has anybody done it before and successful. Thank you
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Click to collapse
If you mean sim unlock,all I did was call and ask for the unlock code,as long as your account is in good standing,shouldn't be an issue.
jueda1992 said:
Please How can I unlock my Samsung S8+ Locked with Xfinity Mobile to any Carrier. Has anybody done it before and successful. Thank you
Click to expand...
Click to collapse
I sent them a text msg asking for it. 3 days later arrived in my email
Unlocking Xfinity S8+
Your post says they gave you the code in response to a text. Did you already have the OEM unlock opition visible in dev options? I don't even have the prompt... I wiped cache part and did factory reset, as someone suggested, but it did not appear after that (contrary to what this person said they'd experienced). So, did you unlock with some specific dial code? or did your settings>dev options have an OEM unlock prompt?
BillL66 said:
Your post says they gave you the code in response to a text. Did you already have the OEM unlock opition visible in dev options? I don't even have the prompt... I wiped cache part and did factory reset, as someone suggested, but it did not appear after that (contrary to what this person said they'd experienced). So, did you unlock with some specific dial code? or did your settings>dev options have an OEM unlock prompt?
Click to expand...
Click to collapse
Try flashing it
BillL66 said:
Your post says they gave you the code in response to a text. Did you already have the OEM unlock opition visible in dev options? I don't even have the prompt... I wiped cache part and did factory reset, as someone suggested, but it did not appear after that (contrary to what this person said they'd experienced). So, did you unlock with some specific dial code? or did your settings>dev options have an OEM unlock prompt?
Click to expand...
Click to collapse
You have confused SIM (carrier) unlock with bootloader unlock. You can not unlock the bootloader on any US (snapdragon) version of the S8 and S8+.
On the other hand, you can SIM unlock with the code that Xfinity Mobile gave you. Turn off the phone, and replace the XM SIM with one from a different carrier. Boot the phone, and your device will ask for SIM unlock code.
cam30era said:
You have confused SIM (carrier) unlock with bootloader unlock. You can not unlock the bootloader on any US (snapdragon) version of the S8 and S8+.
On the other hand, you can SIM unlock with the code that Xfinity Mobile gave you. Turn off the phone, and replace the XM SIM with one from a different carrier. Boot the phone, and your device will ask for SIM unlock code.
Click to expand...
Click to collapse
Hi, and about the z3x Samsung tool, is possible to unlock with that program?
I know its more complicated, i have been searching and reading and found that.
I try a unlock code without success, now ask me the puk code , and the company refund my money.
And now what's my chances to unlock it?
cavags5 said:
Hi, and about the z3x Samsung tool, is possible to unlock with that program?
I know its more complicated, i have been searching and reading and found that.
I try a unlock code without success, now ask me the puk code , and the company refund my money.
And now what's my chances to unlock it?
Click to expand...
Click to collapse
I'm not familiar with the Z3X tool. If you're trying to carrier/SIM unlock your device, your best and possibly only option is to get your carrier to unlock it.
If you are trying to unlock your bootloader, it's not possible.
cam30era said:
I'm not familiar with the Z3X tool. If you're trying to carrier/SIM unlock your device, your best and possibly only option is to get your carrier to unlock it.
If you are trying to unlock your bootloader, it's not possible.
Click to expand...
Click to collapse
The carrier ask me 20% of retail price its madness.
I will search a little more.
Thanks mate.
z8ball8 said:
If you mean sim unlock,all I did was call and ask for the unlock code,as long as your account is in good standing,shouldn't be an issue.
Click to expand...
Click to collapse
I think Xfinity is CDMA, so this is the only viable option you have.

Willing to Pay for bootloader unlock, if possible.

I was under the impression the device I ordered off ebay could be bootloader unlocked (apparently verizon pixel 3a), but can't seem to figure it out myself, and i'm starting to think its not possible. If anyone can unlock the bootloader, I am willing to pay.. If not.. :RIP: :crying: Hopefully this doesn't violate the rules, didn't see any.
Unlocking the bootloader on Pixel phones is pretty easy. You can use the guide here to unlock the bootloader.
You will need to use ADB. If you are not familiar with ADB, you can use the guide found here.
I'm assuming that you want to unlock the bootloader so that you can root your Pixel. I used this guide.
I reread your post and noticed that you bought a Pixel that is carrier locked to Verizon. Usually, unlocking the bootloader of a Verizon phone is either not possible or difficult. The information that I gave you is for carrier unlocked Pixels. I haven't had a carrier locked phone in many years so my memory of what is possible is probably a bit fuzzy.
desertcat said:
Unlocking the bootloader on Pixel phones is pretty easy. You can use the guide here to unlock the bootloader.
You will need to use ADB. If you are not familiar with ADB, you can use the guide found here.
I'm assuming that you want to unlock the bootloader so that you can root your Pixel. I used this guide.
I reread your post and noticed that you bought a Pixel that is carrier locked to Verizon. Usually, unlocking the bootloader of a Verizon phone is either not possible or difficult. The information that I gave you is for carrier unlocked Pixels. I haven't had a carrier locked phone in many years so my memory of what is possible is probably a bit fuzzy.
Click to expand...
Click to collapse
The phone is not carrier locked, but it was a verizon phone previously. Thanks for the links, and basically my problem I run into is the Greyed out unlock option in developer settings.
Have you tried doing a factory reset and then allow the phone to update over wi-fi?
TurboGSXpixel said:
The phone is not carrier locked, but it was a verizon phone previously. Thanks for the links, and basically my problem I run into is the Greyed out unlock option in developer settings.
Click to expand...
Click to collapse
Remove the sim card, do a factory reset, and then go through the setup without the SIM installed. This should allow the OEM unlock to be toggled. Its worked for multiple other people.
Did you switch from Verizon to Tmobile? It appears from what I'm reading that TMO sims are downloading carrier specific settings/options which block the unlock switch.
Regardless of whether you use tmobile or not, the above method *should* allow you to unlock.

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