To format a phone, you can follow these steps:
1. Back up your important data: Make sure to back up all your important files, contacts, photos, and any other data you want to keep.
2. Reset to factory settings: Go to the settings menu on your phone, look for the "Backup & reset" option, and choose "Factory data reset." This will erase all data on your phone and restore it to its original factory settings.
3. Remove your SIM card and memory card: Before formatting your phone, make sure to remove your SIM card and memory card to avoid losing any important data stored on them.
4. Confirm the reset: Once you have selected the factory data reset option, your phone will ask you to confirm the action. Follow the on-screen instructions to proceed with the formatting process.
5. Wait for the process to complete: The formatting process may take some time, so be patient and wait for your phone to complete the reset.
6. Set up your phone again: After the formatting process is complete, you will need to set up your phone again by following the on-screen instructions. You can restore your backed-up data at this point.
Please note that formatting your phone will erase all data on it, so make sure to back up everything important before proceeding.