T-Mobile sued after employee stole nude images from customer phone during trade-in::T-Mobile has been sued again for failing to protect consumer data after an employee at one of its Washington stores stole nude images off of a customer’s phone.
Phones these days are encrypted. If you ever set up a pin/password to unlock your phone, that means it’s encrypted. Just make sure your phone is powered off or restarted (or battery drained, if the off button isn’t working), before you drop it off at the repair shop.
No one can access your files in this state - not even the manufacturer (unless there’s backdoor, but that’s a different topic - but even then, there are many “secure folder” type apps you could use to encrypt sensitive data).