Default [Q] My applications keep disappearing, how to get them back?

All my application icons on the HOME screen are gone...

then when i press "application" to see all my installed apps (even stock apps),

nothing shows up! All i see is my wall paper! So I have no way of accessing any of my apps!

This has happened numerous times, i've tried getting phone to factory settings but still no solution

It's SGS 2 i9100 M (bell)

It's unlocked

original stock firmware

please help!!!