Videocon a15+ is well locking mobile with good screen and touch, It has Operating System Android 4.2.2 (Jelly Bean). Cpu speed is dual core 1ghz 256 mb of ram. Here we talk about pattern lock problem slow speed of mobile and hang problem. We can solve these problem by hard reset method via key combination. Follow the steps below....
1.Press and hold volume Down power button.
2.When android logo appear
3.Select Recovery Mode
4.use vol down key for scroll (don't press vol up key)
5.go to wipe/reset and press vol up key to select
now reset done