My Sprint Galaxy 4 Note has wifi calling issues? 80% of the time when I attempt to answer a call I get nothing/silence. Nobody is there. I come to find out the caller hears it ringing like normal and it eventually goes to VM. Why can't I answer it with the caller there? I do have an airave but I blocked my number(I think I did it right) from being able to use it thinking thats the problem. Also if I wanted too use the airave my Note 4 wouldn't connect to it anyway. Please help! Thank you.