It is pretty easy for iPhone users to run into an iPhone activation error possibly when you activate a new purchased iPhone, get to reset an iPhone to factory settings or restore iPhone to let it a new one. Either way, the iPhone stuck on an inactive screen will show you "Activation Error" or "Could Not Activate iPhone" message. This error may be caused due to the activation server is temporarily unavailable, iTunes failed to verify iPhone, SIM card is not supported, iPhone can't be recognized, etc. If you're not sure the specific situation, you might as well look at the following content to see some basic and common solutions.
Part 1. 5 Ways to Fix iPhone Activation Error Effortlessly
#1 Check Network Connection
#2 Try Again
#3 Check SIM Status
#4 Restart iPhone
#5 Activate iPhone via iTunes
Part 2. How to Fix iPhone Back to Normal without Data Loss
Perhaps, there is no access to activate your iPhone with above-listed solutions. You may wonder what to do in this case. Don't be anxious. Take the aid of Joyoshare UltFix iOS System Recovery to repair this tricky iPhone activation error with no data loss.
This brilliant iOS repair tool can be compatible with all iOS versions and models powerfully so that your iOS 12 or iPhone XS/XR can be supported without hassle. Other than that, it's also capable of fixing more than 30+ iOS system issues efficiently, including iPhone stuck on Apple logo, iPhone in boot loop, black/white/red/blue screen, iPhone stuck in recovery/DFU/headphone mode, iPhone no service, iPhone is disabled connect to iTunes, etc. The most attractive point is that it gives a free option to enter or exit recovery mode with only one click.