If I erase all content and settings will I lose my contacts?
The answer depends on where the contacts are stored.


If the contacts are stored in iCloud, you will not lose the contacts. Log in to iCloud and the contacts will be restored.
If the contacts are on your SIM card, you will not lose the contacts. You can re-import the contacts from your SIM card.
If the contacts are stored on your device, you will lose the contacts.