How do I wipe my phone before selling it?

Go to Settings > General > Reset > Erase All Content and Settings. You’ll be asked to confirm, and it may take a few minutes to complete the process. Start by backing up your Android phone, then remove any MicroSD cards and your SIM card. Android has an anti-theft measure called Factory Reset Protection (FRP).

How do I permanently erase my Android phone?

Go to Settings > Security > Advanced and tap Encryption & credentials. Select Encrypt phone if the option isn’t already enabled. Next, go to Settings > System > Advanced and tap Reset options. Select Erase all data (factory reset), and press Delete all data.

How do I completely erase my iPhone?

Wipe all content and settings from iPhone
  1. Go to Settings > General > Transfer or Reset iPhone. If you’re erasing your iPhone because you’re replacing it with a new iPhone that you have on hand, you can use extra free storage in iCloud to move your apps and data to the new device. …
  2. Tap Erase All Content and Settings.

Does erasing your phone delete everything?

When you do a factory reset on your Android device, it erases all the data on your device, and returns the phone back to its original out-of-the-box state as it was from the factory.