1- Charge your mobile upto 70 percent to reset the pattern of mobile.
2- Switch off your mobile.
3- Press & hold Power + Volume up.
4- Out-of-the option appearing on display, select recovery.
5- Select language English by volume down and enter through power key.
6- Choose Wipe & Reset".
7- Select Wipe all data.
8- Confirm with selecting Yes.
9- Reboot System now, now pattern will be reset.