unable to actiivate Iphone 7 128GB (Model A1660) after updating to IOS 13.5.1
I have updated my IOS software to 13.5.1 on my Apple Iphone 7 (Model A1660) two weeks ago.
Since the update to the latest IOS version, my iPhone 7 says “No Network" and I cannot activate my phone as I receive this error message: "unable to activate iphone an update is required key is missing"
I have tried to restore my iPhone 7 at least 20 times using iTunes and my MacBook Pro.
It has not fixed the issue.
I have put the phone into DFU mode many times, did a full restore using the latest Itunes version.
I have tried using different SIM cards in my phone, it all has the same result.
I have used my SIM card in another iPhone, it is picking up the network perfectly.
I have been using my iPhone 7 for about 3 years without any problems.
I have an iPhone 7 128GB (White in Colour)
Model: A1660
Has anyone had this problem and how do I resolve this problem?
iPhone 7