it is safe putting cell phone in pocket?

sum times safer... n may not for few times............

If the vibration affects the body, then it follows that the signal when you are calling affects your brain when you put it near your ear. I think there is very little health issue regarding the use of cellphone. But if you are concerned about this and think that it is unsafe, I suggest avoid using the cellphone.

No. This is complete rubbish. The dangers of cell phones (if there are any) are to do with the radiation of radio waves, not the vibration (which you can turn on and off).