I own a Samsung Tab A7 and forgot the lockscreen password. After searching on YouTube, I attempted to unlock the device with factory reset to no avail. Then I went to a local "Big Box" store and the squad wasn't able to unlock the tablet. Still having hope, I searched online for a tablet repair shop and found A2 Phone Repair. The technician was so friendly over the phone, and gave a quote for the repair. When I went to the store I was greeted upon entering with a warm smile and cute doggy sitting off to the left of the desk. Quick fix and the tablet was ready the next day. If you're having issues with tablets locked, I highly recommend A2 Phone Repair.