What happens to carrier settings when I reset network settings for 4G?
If I 'Reset network settings' in order to access 4g, will the reset the settings from my carrier (Tesco Mobile)?
[Re-Titled by Moderator]
Yes, see this
If you're using iOS or iPadOS 15 or later, tap Settings > General > Transfer or Reset [Device] > Reset > Reset Network Settings.
If you're using iOS or iPadOS 14 or earlier, tap Settings > General > Reset > Reset Network Settings.
This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before.