This is a tutorial on how trick the billing system so the game thinks you bought it from the play store. I create this tutorial because there are some people around here that don't appreciate my work and write ***** all the time. By this tutorial i give a chance to the developers to fix their error and should use the other system instead that require a connection to the server to verify the purchase (wich many apps and games already have (Radiant Defense, smurf village, glu games etc). 1. Dowl