iphone SE first generation sim is locked after ios update to 15.4.1 was not locked before update. carrier & service it says is unknownnow the imei checker says it is At & t.

We can’t unlock this AT&T PREPAIDSM device right now

Request number: ${masterData.requestId}

Hi JEFFREY,

Before you can unlock your prepaid device, you have to use it on the

AT&T network for at least six months. After six months of network

activity, you can submit a new request.

Thanks for choosing us,

AT&T

[Personal Information Edited by Moderator]

hi, thank you for your response. I have xfinity here at home & the se has it on. no roaming. I am pretty sure at&t is around here as well, + they have a store in this town. I have a sim tool, i will, l check the iphone SE to see, + if I can put in a master code / sim pin will have to read instruction fort this very carefully. the email I received from AT T says I must use the phone for 6 months, the rep said that as well...I have never had AT&T as my carrier. wonder why I am suppose to use it, I never asked for them in the first place, & bought the iphone on the Mercari website. getting At&t for six months is about 200.00, more thank 4 times what I even paid for the iphone SE. here is what I received from AT&T.

We can’t unlock this AT&T PREPAIDSM device right now

Request number: ${masterData.requestId}

Hi JEFFREY,

Before you can unlock your prepaid device, you have to use it on the

AT&T network for at least six months. After six months of network

activity, you can submit a new request.

Thanks for choosing us,

AT&T

[Personal Information Edited by Moderator]