I just bought a Dell venue 8 tablet. Runs on kitkat. The problem I observed is when new message arrives, it notifies through ring tone, even though all notification are off. And more Surprisingly, it continue ringing and I find no way to stop it. It does not happen every time, but randomly. I tried to isolate various situation, but I feel it is totally random. Is there am issue with aqua or something with my new tab. My aqua version is 1.5.1.13