iphone 6s plus-Unable to activate after factory reset
I am in Nepal and there is no any official apple store here to physically visit. This particular iphone was bought in Dubai fully unlocked and paid for. Phone was working just fine until I started losing my cellular network now and then. I would simply take my sim out and put it back in and it would work. I tried to update it to the latest version, it stuck at the error message like it " couldn't connect to the internet" after the whole update was downloaded but not installed. I checked with my carrier and tried other sim card as well and confirmed its not them.
So I tried a factory reset after the back up in itunes and now I can't even setup the iphone. I get stuck at the message-"Unable to Activate". "An update is required to update your phone." I tried all the method including the recovery mode as well with same results.
Please help. I think calling apple is my last option.
Thank you
PS: I have my important files and google authenticator in my phone. The only option I have left is to get a new iphone and restore my backup data.