I got a new phone today, the Samsung Monte. I was wondering will it charge extra to my contract if I use the built in facebook app on the main menu. I am paying just £10 a month for it on O2 for unlimited texting and 50 mins (I never call anybody lol). So if any of you can help me out here it would be great because I am scared to press the facebook button in case it charges extra to my contract 
Thanks.
Thanks.