Here I will show you how to hard reset your Lava Iris 356. So that you can remove your pattern lock or gmail lock.
just follow my instructions:
1. Press and hold volume up & power key until you see this screen.

2. Now press Power Key, then you will see the below screen.

3. Now go to ” Wipe data/factory reset” by pressing volume down key.
4. Now press volume up key.

5. Now go to “Yes — delete all user data” by pressing volume down key & press volume up key.
6. Now press volume up key once again on “reboot system now”
Its all done friends enjoy