How do you  check sim card status?
 To check your MTN Sim card registration simply send REG as an SMS to 789 and you will receive a response that will show you the status of your Sim card registration. Glo Sim registration Check. To check You Glo Sim card registration simply. Send REG as an SMS to 3456. to know if you Sim is registered or not. Etisalat Sim Reg Check. To Check If Your Etisalat SIM Has Been Registered. For Etisalat, you can verify your SIM card registration status by calling 200 or sending an email to care@ etisalat.com.ng. Airtel Sim Reg check. 