If you've ever called your carrier's customer service to activate a prepaid SIM card or troubleshoot a malfunctioning Android ...

If you purchased your device from T-Mobile, the SIM card is probably installed. If not, you must provide your phone's IMEI number. The customer service rep may also ask for the ICCID number on ...

There are several ways to check your mobile number from your SIM card, as explained below: Asking the Carrier: Depending on your carrier, you may be able to call or text a special number that will ...