My sim card is not working each slot i reboot it so many time

[AC Question]

My phone is no sim detected I. Reboot it so many time

 

[Tim1954]

Troubleshoot. Does that sim work in other phones? If yes, it's your phone. If no, it may be the sim. Talk to your service provider.
Does your phone "see" other sims?
If yes, it was the sim. Talk to your service provider. If no, the card reader may be faulty.
First thing to do is take the sim and gently clean the gold contacts on it..