Q: iPhone is at a grey screen after flashing for a few minutes

Hi Brialex119,

If your iPhone is flashing with a grey screen, I would suggest resetting the device and resetting the network settings.  If that does not resolve the issue, then you may need to back up to iCloud and restore it.

Restart or reset your iPhone, iPad, or iPod touch - Apple Support
https://support.apple.com/en-us/HT201559

iOS: Wi-Fi settings grayed out or dim - Apple Support
https://support.apple.com/en-us/HT204324

 

1. Restart your iOS device.
2. Make sure that airplane mode is off by tapping Settings > Airplane Mode.
3. Reset the network settings by tapping Settings > General > Reset > Reset Network Settings.
   This will reset all network settings, including Bluetooth pairing records, Wi-Fi passwords, VPN, and APN settings.
4. Make sure that your device is using the latest software. To do so, connect your device to your computer and check for updates in iTunes.

Back up and restore your iPhone, iPad, or iPod touch using iCloud or iTunes - Apple Support
https://support.apple.com/en-us/HT203977

Regards,

- Judy