I bought a device not knowing it was carrier lock to T-Mobile I live in Vietnam I'm unable to use my current sim card with it I am very familiar with flash and custom roms unlocking bootloaders on chami devices is there any way that this device can be converted from being a paperweight into a device that can be used with a non t mobile sim card
wait you said 70 dollars for unlock but that's what a bootloader unlock costs, what about an online SIM unlock ? that can't be 70 dollars too.
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I recently ordered an unlock code from TMobile UK and have successfully unlocked my phone. The question is whether it remains unlocked forever or will it lock again when I update to a new ROM (official or cooked).
Thanks in advance
or by hard restart
does it remain unlocked after a hard reset?
as far as I know when you ordered a unlock code from T-Mobile then it is a sim unlock number to allow you to use other providers in the phone the CID lock is is still there .Still after a hard reset your unlock from T-moblie you should still be able to use other sim cards from other providers
So basically keep my code safe???
Is that what you are saying? That I will need to unlock again when I update with a new ROM?
If so, I'd better keep a note of the Unlock code!
Thanks to everyone who responded.
Basically, I have an ATT branded M7 that should have been carrier unlocked. First thing I did was complete the HTCdev unlock to install TWRP and supersu. I completed a SIM swap from a mini-SIM to the micro-SIM for this phone and it is asking for the network password which the provider is telling means that it is not carrier unlocked? Could the HTCdev unlock caused this? Seems like the SIM unlock is in a different area of the boot loader that requires s-off so I think no. Need to contact the eBay seller but anyone have any other suggestions? Is S-off and unlock the only option for a permanent SIM unlock?
genseng said:
Basically, I have an ATT branded M7 that should have been carrier unlocked. First thing I did was complete the HTCdev unlock to install TWRP and supersu. I completed a SIM swap from a mini-SIM to the micro-SIM for this phone and it is asking for the network password which the provider is telling means that it is not carrier unlocked? Could the HTCdev unlock caused this? Seems like the SIM unlock is in a different area of the boot loader that requires s-off so I think no. Need to contact the eBay seller but anyone have any other suggestions? Is S-off and unlock the only option for a permanent SIM unlock?
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Bootloader unlock and s-off are not related to sim-unlock. You probably got scammed by the seller, but sim-lock can be removed easily using a sim-unlock code which you can buy online (for really cheap). So it might not worth wasting your time contacting the seller.
There is another method to sim-unlock that require s-off(sieempi)
Sim-unlock is permanent even if you unlocl/relock bootloader or if you turn security on/off (s-on/s-off)
Thanks for confirming. Is there anyway to determine if it has been hardlocked?
genseng said:
Thanks for confirming. Is there anyway to determine if it has been hardlocked?
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what are you talking about? Hardlocked?
Something about if an incorrect code 10 times there's another layer of locks (found AT&T page that references PUK and PUK2 codes). Are those different than the carrier lock we're discussing? Found a cheap code on eBay. Ordered it, will find out shortly I guess.
genseng said:
Something about if an incorrect code 10 times there's another layer of locks (found AT&T page that references PUK and PUK2 codes). Are those different than the carrier lock we're discussing? Found a cheap code on eBay. Ordered it, will find out shortly I guess.
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AFAIK (I'm not an expert on this) PUK codes are used to unlock the device when a wrong PIN was entered to many times in an attempt to access the device. PUK (Pin Unblock Key = Personal Identification number unblock Key) locks the device on a lower level or/and the sim card can become locked (preventing access to data stored on the card) but this have nothing to do with sim-lock that are locking your phone to a specific carrier.
Im not even sure if PUK is still used, ppl just reset their PIN using their google account or they are performing factory reset....
purchase the sim-unlock code, insert the new sim card, enter the code when prompted.
Thanks for the explanation. I did manage to test the new SIM in another phone and it worked and another known good SIM resulted in the same error (new info since OP). Maybe I should have paid more for 15 minute service... ?
Purchased unlock code did the trick.
genseng said:
Purchased unlock code did the trick.
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:good:
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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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?
Hey guys,
I have an AT&T M7 that is off contract and obtained an unlock code directly from AT&T.
Now, how do I go and SIM unlock my device?
Any help/suggestion is much appreciated.
Thanks
smokarz said:
Hey guys,
I have an AT&T M7 that is off contract and obtained an unlock code directly from AT&T.
Now, how do I go and SIM unlock my device?
Any help/suggestion is much appreciated.
Thanks
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Click to collapse
If you already have your unlock code thats a good thing. Now to use it, you must shut your phone down, insert a foreign sim card (from a different carrier than AT&T, borrow a friend's sim card if necessary), boot it up and you should get prompted to enter the sim unlock code. Once done your phone is sim-unlocked and will accept any carrier sim card. Your phone must be running the stock rom btw (or a stock-ish rom, will not work on Cyanogenmod for example but should work on ARHD).
Just got this phone and I've been able to click the oem unlock without unlocking the sim. Not sure if this is different than other t-mobile devices but I'd appreciate some feedback on if other t-mobile users don't need to sim unlock before unlocking the bootloader