If you have forgotten screen lock of smartphone and there is the important or personal data, then you can unlock android phone lock without loosing data. If you reset the password of android or smartphone by factory reset or wipe data option, then all the data is removed from mobile. So, you will know that how to unlock android phone pattern lock without factory reset.
Mostly, people unlock forgotten password through factory reset or wipe dat features because it is too easy. but they lost their all data through this method. if you want that how to unlock android phone password without factory reset then obviously you want to unlock mobile without loosing data.