I bought this phone and it's really a good phone, but the problem is that i have the memory leak issue that come with androide 5.1
So application (like facebook,gmail ...or game like alphabetty, bananakong....) crash after few time of use. But don't worry the phone don't have any problem, it's the androide 5.1 lollipop version that come with that problem but not in all device...hope you're all lucky google said that the problem was solved in 5.1 but it's still there also some made repports that it's in the 5.1.1 version too..... Now i'm still waiting for an update or upgrade for the M5 phone to correct this androide problem.