Factory resetting your iPhone 15 is the most complete way to wipe it clean, returning it to the state it was in when you first took it out of the box. It's a powerful step, perfect for preparing the phone for a new owner or tackling deep-seated software glitches that simpler restarts can't fix. Just make sure you're ready, because it erases everything.
Your Essential First Step: Create a Backup
Before you touch the reset option, secure your data. The easiest way is through iCloud. Go to Settings > [Your Name] > iCloud > iCloud Backup and tap Back Up Now. Stay on Wi-Fi until it finishes. For a more complete local backup, connect your iPhone 15 to a computer with a USB-C cable.
On a Mac with macOS Catalina or later, open Finder, select your iPhone in the sidebar, and click Back Up Now. On a Windows PC or older Mac, you'll use iTunes. This computer backup can sometimes be more reliable for a full restore.
Sign Out of Find My and Your Apple ID
This is non-negotiable if you're giving the phone away. If Activation Lock is left on, the next person can't use it. Head to Settings > [Your Name] and scroll all the way down. Tap Sign Out.
You'll need to enter your Apple ID password and choose to turn off Find My iPhone. This step officially disconnects your identity from the device, which is required for a clean reset.
Perform the Reset Directly on Your iPhone 15
This is the standard method when your phone is working. Open Settings > General > Transfer or Reset iPhone. At the very top, tap Erase All Content and Settings.
The phone will ask for your passcode and then your Apple ID password to confirm. After you confirm, the erasure process begins. It takes several minutes, and your iPhone 15 will restart showing the familiar "Hello" setup screen when it's done.
Use a Computer for a More Thorough Reset
If your iPhone 15 is unresponsive, stuck in a loop, or you've forgotten the passcode, resetting via a computer is the way to go. Grab a USB-C cable and connect your phone to a Mac or PC. Open Finder (on Mac) or iTunes (on Windows) and select your device.
Look for the Restore iPhone button. This does more than a simple erase; it downloads the latest version of iOS and installs it fresh, which can fix corrupted software. Note that you cannot restore a backup after this, you'll set up as new.
If Your Computer Doesn't See the Phone
You might need to use Recovery Mode. On your iPhone 15, quickly press and release the Volume Up button, then quickly press and release the Volume Down button. Immediately press and hold the Side button.
Keep holding the Side button even after you see the Apple logo. Let go only when you see the recovery mode screen (a cable pointing to a computer icon). Your computer should now recognize it and allow you to proceed with the restore.
Consider a Targeted Reset First
A full factory reset isn't always necessary. For issues like Wi-Fi dropping, Bluetooth problems, or general sluggishness, a partial reset might do the trick. Go back to Settings > General > Transfer or Reset iPhone > Reset.
Here, you'll find options to reset only your network settings, keyboard dictionary, or home screen layout. These can solve a surprising number of problems without touching your photos, messages, or apps.
Restoring Your Data After the Reset
Once the reset is complete and you're at the "Hello" screen, follow the prompts. When you reach the Apps & Data screen, choose Restore from iCloud Backup or Restore from Mac or PC.
Select the most recent backup you created. The phone will download your settings and data over Wi-Fi. I'd recommend plugging it into power during this process, especially if you have a lot of photos and apps.
Factory resetting is a reliable solution for persistent software bugs, severe slowdowns, or preparing your iPhone 15 for its next owner. For minor hiccups, a simple restart, or the targeted resets, are always worth trying first. But when you need a truly clean slate, this process gets it done.
