Hi, I'm new to Android and the Note 4 and have a slight problem with Whatsapp that hopefully someone could help me with, sometimes I do not get alerted that I have a new message in Whatsapp and sometimes I do, I never missed a message on the iPhone version but so many times here I'm not getting new messages until I go into the app itself, just wondering if this is a problem with the android version of Whatsapp or a problem with my phone, it only seems to happen if I have wifi off at home but still always have at least one bar of signal although my signal on the 3 network seems a lot stronger on the iPhone than the Note 4 which by the way is an outstanding phone and made the swap to android easier than I thought it would be.