i m facing some problems with my mobiles ,it getting hanged again again ,i feel its due to regualr use of internet can somebody please find out that mobile catch virus when we use internet through it

What mobile you have?
Please give details to let us help better.

I don't think it can cause any problem in mobile ie. virus infection but yes if you are using for long then battery may get drowsy, I don't see any other problem though.

well virus can come through bluetooth also or through internet on mobile..