On checking my BT Mobile bill I have found that almost 30 text messages were apparently sent from my phone (iphone 5) to a number in Pakistan within a 15 minute period. I have not sent these messages and there seems to be no record of them on my phone. No one else had access to the phone at the time. I have been charged for these texts. How can this have happened and how to I prevent it happening again?
I am going to suggest an app. Maybe a side loaded one or one that snuck through quality control. Look for apos or games that you have installed recently, especially if you didn't download them from the app store.