FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -From your APNs screen in Settings, choose the Reset To Default menu item. The phone will remove all the APN from your phone and add one or more default settings that it thinks are appropriate for the SIM you have in your phone.

Detailed explanation-2: -The following process will give you access to your Android phone’s APN settings: Tap on the Settings App. Tap ‘Network & internet’ or ‘Mobile network’> ‘Advanced’> ‘Access Point Names’. Tap the three-dot menu to select ‘New APN’ or select an existing APN to make changes.