Lava Iris 349 Google Account & Pattern Unlock Remove ways

u need to boot ur phone into fastboot (Follow exactly what i said bellow)

Power off phone
Pull out Battery & insert it again
Press Volume Down + Power Button for 20 seconds
Ur phone will boot up with fastboot

Now open Android Multi Tool & Press 8 from ur PC keyboard & press Enter

Android Multi Tools v1.02b


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Lava N320 Hard Reset Pattern Lock Solution ways

Press And Hold Volume Down + Power Key

U Will See A Secret menu
Select 8Th Option (Clear Flash) 

Please Backup Your Data Before Do That.