I\'m trying to integrate Android Market in-app purchases into my app, but unfortunately coming across an annoying error every time I try to purchase a real inapp product.
There is another possible cause for this error, which has almost driven me mad for a whole day until I found what was the problem: the apk version. If you are working with a local apk (correctly signed, correct key, correct product ids) with a version number higher than the one uploaded to the Play Store, you will also get this error.
Hope this helps someone