I've managed to replace the battery successfully in my iPhone5, but something went wrong with a friend's (battery status is stuck, sometimes the phone reboots for no reason).
So, i decided to open it up again and reseat the ribbon cables in case they came loose.
I can't open it now. The Pentalobe screwdriver is worn out! I can't open these screws no matter what. I don't know what to do now as I can't be sure I haven't worn out the actual screws themselves, too. Any ideas?