I've just been checking my mobile phone account for June and find some 50 text messages to international numbers with 44 prefix.  all relatively cheap on my plan, but I know they haven't been sent by anyone using the phone.  The  phone has been used for Facebook based games including Slottomania, Bejewelled Blitz, Diamond Dash and Bubble speed.

Anyone heard of any of these sending texts, or what else it could be?

Thanks in advance for your help.

Charlie