i hope google could fix it because i thought it was a problem with the device and i have done a factory reset(it happend with my mobile a long time a ago and the factory reset solved the problem.Also more people have this problem with their prestigious device(you can see them in the prestigio facebook page)
My prestigio devices don't have this problem. I guess it is something that google blocked for the GV7777. I will check the Facebook place you said.