Most phone repairs require access to the basic functionality of the phone as part of the quality assurance. Any physical repair has the possibility of causing another fault for example bending a contact pin of the sim card reader when reassembling the phone case. You want the technician to verify that the phone fully functional and not just that the reported issue is fixed. That being said the technician does not need access to data on the phone but they routinely do access the data. Back my day they would read the txt messages on 2G phones.
Biting the hand that feeds IT
