I brought my Huawei Mate 10 lite to be repaired today because my battery has swelled up and my screen has been pushed out… Now that's fine, but now my sound, my SIM card doesn't want to vibrate anymore and it's too slow become. What kind of snot happened this morning, did everything still work?
If it really occurred AFTER the repair, I would say that the repair (replacement of the battery) has blown and broken more than it did. Complain.