Don’t worry — this is a common issue and usually easy to fix!
“Cellular Update Failed”
What This Means (In Plain English)
Your iPhone was not able to update the part that handles phone calls and mobile data. You may not be able to make calls until this is fixed.
Common Causes
- •A software update that did not install correctly
- •A glitch in the cellular modem firmware
- •A network settings conflict
How to Fix It — Step by Step
- 1
Restart your iPhone: hold the side button, slide to power off, wait 30 seconds, then turn it back on.
- 2
Go to Settings > General > About — if a carrier update appears, install it.
- 3
Try toggling Airplane Mode on and off.
- 4
Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.
- 5
Make sure your iPhone software is up to date: Settings > General > Software Update.
- 6
If the problem continues, contact Apple Support or visit an Apple Store.
How to Prevent This in the Future
Keep your iPhone software up to date and always update over a stable Wi-Fi connection.
Related Errors You Might See
No Service
Your iPhone cannot connect to your mobile carrier. You will not be able to make calls, send texts, or use mobile data until this is fixed.
SIM Not Provisioned
Your SIM card is not set up properly with your phone carrier. Your phone cannot connect to the mobile network to make calls or use data.
Still stuck? Don’t worry!
If the steps above did not solve the problem, ask a trusted friend or family member for help, or contact us and we will do our best to assist you.