EMEA Lock

I ended up solving the problem by doing a hard reset with my phone plugged into itunes.

You can find details on how to do that here: https://support.apple.com/kb/HT201328

Although this didn't work the first few times, after long discussions and speaking with an apple senior advisor he Co twcted the engineering time and found out that because it was a replacement device, the IMEI number needed to be 'reset', as it was originally a locked phone.

Hope this saves someone from hours on customer service...

Also having the same problem. My iPhone 6 is a replacement device from Aviva insurance based in the UK and was delivered to me locked to T Mobile (UK). I had them unlock it in July 2016 to use on a Verizon (US) network. I switched between Verizon and T Mobile multiple times successfully until October 2017 when I reset the phone and erased all the data on it. I now set the phone up as a new phone. Now, however, although it is unlocked according to Verizon and Tmobile (UK), when I place an AT&T or Verizon sim card in it, it doesn't work and I receive an alert saying that the sim card is incompatible according to the activation policy assigned by the activation server..

However, when I place a UK t mobile sim card in the phone it works. T mobile claims they can't do anything as the phone is unlocked on their server, and apple says they can't do anything because unlocking resides solely on the hands of the carrier... ***?!?

Hello.

I have the same problem. did you find how to unlock it?