How do I recover my contact names?
Allow the Phone App to Access Your Contacts
Like most apps, the Phone app on your Android also requires permission to access your contact list. If you have previously disallowed this permission to the Phone app, your Android will display numbers instead of contact names during incoming calls.
Why is my contacts not showing names?
Actually, there could be various reasons that lead to Android phone contacts disappearing: A failure or glitch of an Android update. Some rogue third-party apps interfered with your account syncing. Factory reset your phone without backup.
What happened to my contact list?
Android Data Recovery Tips
Actually, besides Android system upgrades, there are various reasons that can lead to Android contacts missing, such as failed jailbreak, accidental deletion, the old phone doesn't work or broken, water damage, etc.
Why did my phone delete my contacts?
How do I recover permanently deleted phone numbers?
Why have my contact names disappeared from my iPhone?
How can I recover my deleted contacts after 30 days?
What happened to my contact names on iPhone?