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Carrier T-Mobile iPhone 6S PLUS not unlocked for AT&T? Help

ansabakhan

ansabakhan

macrumors 65816
Original poster
Mar 3, 2010
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I bought a iPhone 6S plus on ebay which was listed as a T-Mobile iPhone..... my understanding is all t-mobile iphones work with AT&T. However while the iPhone I received do work with Tmobile it keeps giving me "invalid Sim" error when I try AT&T sim...

the model on this phone is: NKU62LL/A

Can any one please help me figure this out ? I need to use this phone with att

Thanks in advance !
 
All TMo phones (like others) will work with ATT - IF THEY ARE UNLOCKED.

You bought a phone that is locked to Tmo. You can reach out to Tmo and ask them to unlock it. But as of now, it sounds like you have a perfectly functioning phone locked to the original network.
 
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The original owner most likely purchased the phone from a T-Mobile store, where they are locked to T-Mobile. The T-Mobile model that Apple directly sells is unlocked.

Try contacting T-Mobile or the seller to see if you can get it unlocked or returned.
 
Tmobile phone are locked too ? I never knew that .... I thought all Tmobiles phone are unlocked.. also I cant find any info on this model NKU62LL/A any where
 
my understand was that all Tmobile iPhones are unlocked for AT&T ?
 
ohh didn't know that ! do they unlock Tmobile iPhone on ebay like that do for AT&T ?
 
iPhones with a T-Mobile iPhone SIM purchased from Apple are unlocked. Those purchased from T-Mobile are locked.

T-Mobile has a very lenient unlocking policy that allows customers to contact T-Mobile after 40 days and request an unlock. It requires that the iPhone is paid in full and you didn’t agree to any sort of promotion, such as an Early Termination Fee payoff for switching from another carrier.
 
t-mobile will unlock phones as long as they were paid in full and used for 70 days.

now on to this AT&T matter.

i have some really bad news for you. the t-mobile iPhone 6s plus was made for T-Mobile, Verizon and Sprint. it lacks channel 30. and because of this AT&T will most likely refuse to activate service on this model.

my belief is based on my own unlocked 6s+ failing at&t's imei checker. its been my experience AT&T will refuse to activate new lines of service that do not pass this test. as a matter of fact, they won't mail you a sim card or allow you to place a web order unless they like your imei


your going to need a pre-activated AT&T sim from another phone. you probably wont be able to sign up a new line of service. i think once the phone is unlocked it may work with a sim from another phone, but i have never tried it


all is not lost. you can still bring the T-Mobile / Verizon / Sprint iPhone 6s + to cricket, because cricket likes non AT&T iPhone 6s+ phones!

the 6+ was AT&T , T-mobile , Verizon in one model and A.T V & Sprint . Sprint wanted the Sprint Model

the 6s+ is T, V , and S with AT&T wanting their own model
[doublepost=1458969920][/doublepost]oh . AT&T might accept the imei off of SIM FREE one. but thats not what you have. i don't have a SIM FREE so i can't test this
 
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I was made aware a few weeks ago by @eyoungren that TMO will actually unlock phones that have been registered on an active TMO account for something like 60 (or was it 90?) days irregardless of whether there is still an active payment plan.

We are on Jump on Demand since launch and all three of our phones have been unlocked. Apparently it is a system bug that TMO is aware of, however they don't seem to care or... who knows...

Anyway, try contacting the seller and see if they have a TMO account active that they can do this for you with (I do believe if it's still on an installment plan on the account that this would be the only way to go, but anyone is encouraged to correct me on this). If it's fully paid off it should be as simple as contacting TMO yourself and making this request.
 
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lordofthereef said:
I was made aware a few weeks ago by @eyoungren that TMO will actually unlock phones that have been registered on an active TMO account for something like 60 (or was it 90?) days irregardless of whether there is still an active payment plan.

We are on Jump on Demand since launch and all three of our phones have been unlocked. Apparently it is a system bug that TMO is aware of, however they don't seem to care or... who knows...

Anyway, try contacting the seller and see if they have a TMO account active that they can do this for you with (I do believe if it's still on an installment plan on the account that this would be the only way to go, but anyone is encouraged to correct me on this). If it's fully paid off it should be as simple as contacting TMO yourself and making this request.
Click to expand...
40 days.

I have since heard conflicting info from T-Mobile employees. So I am not sure if they really know what's going on or not. But my phones are unlocked and we still owe on our lease.
 
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I thought all Tmobiles phone are unlocked.
3ce12.jpg
ht11.jpg

dh.jpg
 
its all moot. AT&T won't accept the phone on a new line, because its a 6s+ you will need it unlocked and a pulled sim and to cross your fingers. AT&T does not like the a1687/a1688
[doublepost=1458978535][/doublepost]
tenaniing said:
I thought all Tmobiles phone are unlocked.
3ce12.jpg
ht11.jpg

dh.jpg
Click to expand...

soft of. if you buy a t-mobile phone from t-mobile its locked. if you buy a t-mobile phone from apple its unlocked
 
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without a valid imei number from an AT&T iPhone 6s+ you can't even add a sim card to your basket.6splus imei.jpg

this is the same error i got when i tried to add a blacklisted amazon fire phone.
the pulled sim is your only hope once the iPhone is unlocked, if that doesn't work , you will have to switch to cricket.
 
ansabakhan said:
I bought a iPhone 6S plus on ebay which was listed as a T-Mobile iPhone..... my understanding is all t-mobile iphones work with AT&T. However while the iPhone I received do work with Tmobile it keeps giving me "invalid Sim" error when I try AT&T sim...

the model on this phone is: NKU62LL/A

Can any one please help me figure this out ? I need to use this phone with att

Thanks in advance !
Click to expand...

No.
Your understanding was false.
Next time do your research before you buy.
Not the sellers fault.
 
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