Simply erasing will not remove the passcode.
Did you do all this?
Remove your personal information from your old device
- If you paired an Apple Watch with your iPhone, unpair your Apple Watch.
- Back up your device.
- Sign out of iCloud and the iTunes & App Store.Â
- If you're using iOS 10.3 or later, tap Settings > [your name]. Scroll down and tap Sign Out. Enter your Apple ID password and tap Turn Off.
- If you're using iOS 10.2 or earlier, tap Settings > iCloud > Sign Out. Tap Sign Out again, then tap Delete from My [device] and enter your Apple ID password. Then go to Settings > iTunes & App Store > Apple ID > Sign Out.
- Go back to Settings and tap General > Reset > Erase All Content and Settings. If you turned on Find My [device], you might need to enter your Apple ID and password. Forgot your Apple ID or your Apple ID password?
- If asked for your device passcode or Restrictions passcode, enter it. Then tap Erase [device].
- If you're switching to a non-Apple phone, deregister iMessage.
- Contact your carrier for help transferring service to a new owner. If you aren't using a SIM card with your device, you can contact them to get help transferring service to the new owner.
- Remove your old device from your list of trusted devices.
When you erase your iPhone, iPad, or iPod touch, Find My [device] and Activation Lock are turned off.Â