I've had my m8 for about right at four months now and I've never really had a problem. About a week and a half ago, my home wifi became faulty and stopped working for all of my home devices. They would display that there was wifi connection, but there was no actual Internet connection found. I talked to someone in a support store and they suspected our router had a virus and to run an antivirus scan, and if the problem persisted to invest in a new router. So one new router later, all other devices connected to the router are working. But, my phone is still telling me I don't have an Internet connection. I've restarted my phone, tried resetting my wifi connection and just about everything I can think of to no avail.