SIM card registration failed

Users questions: My phone 6120C. But in recent days. There SIM card registration failed. Restarts are good. How's going on, the card is M-ZONE2.0
Experts answer: phone displays SIM card registration failed card, sometimes good, and there may be SIM card is bad, you can remove the SIM card will Side of the metal clean gently with a rubber, and then the phone SIM card in contact with the six points are clean, installed try, generally good. If that does not work, you can go to the mobile company has cards on it.
  • This information provided by the users.Thanks!