The Short Answer
Photos stored only on your iPhone are erased by a factory reset. Photos synced to iCloud Photos survive, because they live on Apple's servers and can be re-downloaded after you sign in again. Photos backed up to a computer, external drive, or another cloud service also survive. The rule is simple: if a photo exists in only one place and that place is your iPhone, a factory reset will erase it. Always verify at least two backup copies exist before resetting. Swype Photo Cleaner before reset helps ensure you are not backing up junk and saves bandwidth on the post-reset download.
What a Factory Reset Does
Erase All Content and Settings (Settings, General, Transfer or Reset iPhone, Erase All Content and Settings) wipes everything on the iPhone: apps, photos, messages, contacts, settings, and the operating system configuration. The device is returned to an out-of-box state, ready for setup as new or restoration from backup.
Anything that was only on the device is gone. This is not recoverable after the fact.
What Survives
Your photos survive if they exist somewhere other than the iPhone:
- iCloud Photos: stored on Apple servers, re-downloaded when you sign in.
- Mac or PC library: if you synced to Photos on Mac or imported via USB.
- Google Photos, Amazon, Dropbox: any third-party cloud service you uploaded to.
- External drive or SSD: if you exported to a local drive.
Pre-Reset Checklist
Before any reset, verify:
- iCloud Photos is on and fully synced. Settings, your name, iCloud, Photos. Look for Syncing Complete.
- A second backup exists (Mac library, external drive, or secondary cloud).
- Open one random photo from each backup and confirm it loads.
- If using iCloud, know your Apple ID and password. Two-factor code from a trusted device.
Restoring After Reset
After the reset and fresh setup, sign into iCloud with your Apple ID. The iPhone will begin downloading your iCloud Photos library. On a fast Wi-Fi connection this takes minutes to hours depending on library size. Photos appear gradually; the full download happens in the background while you use the device.
When Photos Do Not Come Back
If photos do not reappear after a reset, the most common cause is signing into a different Apple ID than before. Check Settings, your name, and verify you are signed into the correct account. Also check if iCloud Photos is enabled. If both are correct and photos are still missing, the photos may not have been in iCloud in the first place, which is the nightmare scenario and why pre-reset backups matter.