To prevent identity theft or any fraudulent use, you must absolutely block your SIM card (access to your plan and phone number) and your phone. To do so, log into your Fizz account. Under My phones you’ll see an option to report your phone as lost/stolen. But before doing that, did you think about using the function to locate your phone? How to find an iPhone phone (iCloud account) How to find an Android phone (Google account) Block your SIM card. Blocking a SIM card allows to block any fraudulent use of your plan, as well as access to your phone number. To do so, log into your Fizz account. Under My phones you’ll see an option to report your phone as lost/stolen and block your phone and/or SIM card. The block is effective immediately. When your SIM card is blocked, your mobile plan remains active. - You will stille be able to access your voicemail from another phone. See how - Best is for you to activate a new SIM card as soon as possible (with another phone if yours is also lost/stolen). - You may also unsubscribe from your mobile plan. This would come into effect at the end of your payment cycle. If you find your SIM card, you can unblock it by going back into your account. Block your phone. Blocking a phone puts it on the National Stolen Device Blacklist. Fizz contributes to maintaining this blacklist in an effort to reduce the number of mobile device thefts. When a device is registered in this registry, its access to the networks of participating wireless service providers is blocked. To block your phone, you’ll need its IMEI. That number is written on the original packaging, as well as in the documentation included at the time of purchase