Unlocked clean imei iphone 5s, got blacklisted, how to update the ios to the latest version?
I recently bought an iPhone 5s t-mobile clean imei and in unlocked state. But after some-days it got blacklisted and working fine with all networks. It is on ios8.1. can i update the iPhone ios to latest version using itunes or OTA?? Or the iPhone will get locked if i update the ios..? Please suggest me how to update the ios of my iPhone to the latest version safely..
iPhone 5s, iOS 8.1, null