If you have pattern lock problem on samsung glaxy S advance I9070 cellphone or you have forgot your gmail account to reset pattern lock then you can solve this problem by hard reset method. With hard reset method you can also solve other problems like operating system , Hang problem etc. Here is simple method to solve this problem just follow the instructions as mentioned below.
Note: All data will be lost by this method take backup of important data before do that.
1.Power off your phone
2.Press and hold volume up + home button + power button
3.Release power button when Samsung logo appear
4.Choose with volume buttons "wipe data/factory reset" and select it with power button
5.Choose "yes delete all data " with volume buttons and select it with power button
7.Wait until the phone restarts