Cellular update
Hi, my phone is saying it needs a cellular update but i tried everything and it did not work and my phone is fully updated. I went to geek squad and they said I probably need a new phone?
How to Update Carrier Settings
You can manually check for and install a carrier settings, update with these steps: Make sure your device is connected to a Wi-Fi or cellular network. Tap Settings > General > About. If an update is available, you'll see an option to update your carrier settings.
Update your carrier settings on your iPhone or iPad - Apple Support