S21 Ultra

[Margè]

Can anyone explain why my phone is changing names in my contacts, when I go to edit to change them back, they are still the same original name but when I go back into my contacts it's still under a different name?

[BandOfBrothers]

That's weird @Margè 

I'm wondering if your phone is syncing with another contact list i.e in Google contacts etc which is affecting your Samsung Contacts list.

To rule that out check what your phone is syncing with.

[AndrewL]

@Margè: Further to the advice offered by @BandOfBrothers you may wish to try moving your contacts to your phone's internal storage to see if this resolves the issue. To proceed, head to the Contacts app > Tap the 3 lines in the top left > Manage Contacts > Move Contacts > From (choose your current storage location > Move > Select the contacts you want to move, or hit 'All' in the top left > To (select 'Phone') > Move.