Maybe the benefit of only ever dealing with extremely sketchy places for phone stuff is that they already know I won't give them information to unlock my phone

Maybe the benefit of only ever dealing with extremely sketchy places for phone stuff is that they already know I won't give them information to unlock my phone so they never ask. Either the repair can be effected without, or I don't want it done. "Is it OK to wipe this phone?" is also an acceptable question, and sometimes the answer might even be "Yes".