1. My friend had opened his facebook on my phone and afta he logged out...all his contacts were added in my cell phone contact list...and they arent getting deleted now...

2. one of my friend sent me a link on whatsapp which i clicked and suddenly my cell got hanged and it continuously gave me pop up windows saying "Hi welcome to this site...nice name....hello..." such things...

please help me get rid off it asap! thanks