How to block all incoming call?

I have Lenovo A880,
I want to block every incoming call but don't know how. What I expect about this call block is when someone call me, it seem like my phone is currently turn off.
I have search on Google, only but they only suggest Android based application where only block when I blacklist certain number phone.

Guest 1 answer

LENOVO or iBALL? Whose phone camera is better in quality?

I want to know whether LENOVO'S CAMERA IS BETTER or iBALL'S CAMERA IS BETTER?
e.g. Lenovo S820's camera is > or = or < iBall Andi5.5N2 Quadro's camera
(both 12MP)

Note: Specifications are nearly same.
But, my question is on camera quality/clarity, which varies from brand to brand even if both phones are 8MP( or both are 12MP).

Added (1). Rajiv Makhni reviews all kinds of phones on TV show Gadget guru india. Even quality comparison, but he specifically didn't review these two together.
My brother compared Xolo 8MP with Lenovo 8MP camera phone, he found Lenovos 8MP was much better than Xolos 8MP. Samsung Galaxy series 5Mp is better than most small brands 8MP. Thats where quality comes into picture.

Guest 2 answers

Which is better Camera? LENOVO's OR IBALL's?

Lenovo S720 8MP Camera Phone or iBall Andi Uddaan 8MP Camera Phone.
WHOSE CAMERA IS BETTER?

Note: Sometimes same 8MP camera's quality varies from brand to brand. I'm CONCERNED with Camera quality/clarity only(other specificatns doesn't matter much). Please suggest.

Guest 2 answers

How to close apps on the lenovo A516?

I have just bought a new lenovo A516 and since i used apple till now i have no idea how to close the apps on this mobile
anyone knows then please help!

Guest 1 answer