My sister has forgotten the password for her phone - a Samsung Galaxy A3, code SM-A320FL - and we have tried to perform a factory multiple times, but to no avail. They all say to turn off the phone either by using the power button or removing the battery. However, this type of phone does not have a removable back, and her phone must have the password entered to turn it off. If anyone can help then that would be amazing, thank you very much!