So my problem is following: The things that i use are: W-LAN App-Market facebook app YouTube app Angry Birds Skype App Facebook Messenger Google Maps Some minor useless Apps just 4 fun GPS just to try it All of these things SHOULD actually be for free. BUT my credit consumption on my PrePaid is higher than it should be from SMS and calling. Add. Information: Sometimes when my W-LAN went down, there appeared sometimes an 'E' with two arrows up and down. Since i switched my APN to a random, not existing one, the 'E' switched to an 'H' with two arrows up and down. Then i changed the name of the standard one 'O2 Internet' to 'O2 Interne' there is neither an 'E' nor an 'H' now. But sometimes it still loads money from my mobile, once after using GPS.. Is there a possibility to kind of make the mobile to NOT USE money for any other thing than SMS and calls?