why was a purchased unlocked device locked by AT&T?

Hello @haroldboring,

We'd be more than happy to take a closer look into your concerns. We'll need some more details in order for us to better assist you. Where did you purchase this device from? What kind of cell phone is this? Did you unlock this device after using it with a different carrier, or did you unlock it after using it with wireless service from AT&T? Please let us know. We look forward to hearing back from you.

Sean, AT&T Community Specialist

If you actually bought an unlocked Samsung phone, it can’t lock to At&t.   If it boots with At&t boot screen, it’s a locked At&t phone.  

is there any way I can tell through any phone information like build number ECT...? thank you

I tried to change carries told there was a lock from AT&T given unlock code from AT&T upon advice received tyavm I called AT&T phone is not locked still however have to ups phone if I want update tyavm

@haroldboring  Wrote: I tried to change carries told there was a lock from AT&T given unlock code from AT&T upon advice received tyavm I called AT&T phone is not locked still however have to ups phone if I want update tyavm

auto correct failed you.  Not sure what tyavm is suppose to be.  If you purchased an At&t version, it won’t convert to Verizon or sprint until after the next OS update, which would be 9 months away.  

Greetings @haroldboring!

Allow us to assist. We advise that you try removing and reinserting your current carrier's SIM card or using another SIM card altogether as damaged or incorrect SIM card placement may be the cause of your current experience.

We hope this info helps.

Lar, AT&T Community Specialist

thank you all very much

Hi @haroldboring

Did the SIM card suggestion work for you?

Darais, AT&T Community Specialist