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A combination of failures has resulted in some iPhone users incurring premium-rate call charges, for calls they didn't know they were making.
Punters who downloaded the free, advertising supported Bubblewrap game from Orsome NZ have spotted the application calling premium-rate numbers, and incurring premium-rate charges, without warning.
Peter Watling, author of Bubblewrap, told us the blame must lie with the embedded advert engine from AdMob. Companies like AdMob provide a small chunk of code that developers can drop into their application. The code collects advertisements from the AdMob server and displays them to the user, with the developer then getting a cut of the advertising revenue. Most adverts are passive affairs, but some encourage the user to interact by tapping on the ad to jump to a website or place a call.
The network providers could act now, and make premium rate charging opt in. As it stands most providers enable this function by default.
If you are worried you can ask your provider to de-provision this at your account level.