LG G2 had this new way of unlocking the smartphone with double tapping on the screen which LG called as Knock ON feature. This feature was embedded in the kernel. The customers who own LG G2 found this double tap feature so useful that they had to expand this feature to other handsets as well.
Observing the same, LG brought the feature to LG’s range of L Series II handsets. The L- Series II line-up is one of LG’s bestselling series, and the Knock-ON feature is now available on LG L1 II, L3 II, L4 II, L5 II and L7 II.
This update is all set to begin its roll-out starting February, 2014 for the above mentioned smartphones.