Some causes of No Service error are no coverage, SIM card problem, iOS system error,... Because there are many different causes, you can try some solutions to fix No Service problem on iPhone according to the instructions below.
Are you trying to charge your iPhone but seeing a warning telling you that liquid has been detected in the connector? Check out the troubleshooting steps you can take to resolve the Liquid Detected warning and get your iPhone charging normally again.
If your iPhone buttons aren't working properly, you should get them fixed as soon as possible. Luckily, there are a number of solutions, many of which you can do yourself.
Is your iPhone not showing recent calls? This can be frustrating, especially if you need to keep track of all your important calls.