InFocus — Infocus m430 - mobile getting automatic turned off

Website: www.infocusphone.com/in

I am using infocus m430 for last 1 year. From last several months i am facing the issue with phone as get automatically turned off. Even though battery is in 100% phone get turned off. At beginning i faced for 1 or 2 times a day. But now it’s getting extended to 10 times a day. I don’t know why it’s happen. Other than this my phone works fine. Also if i need to reboot the phone after turned off means i have to remove the battery and again insert to reboot. I don’t know what i have to do to resolve it. Also some time the service called “pocket prevent mode” gets activated. Is this the problem for this automatic turned off? Help me i[censored] have any information against above issue..
Thanks

Anguraj k