I have been using wifi calling on my iPhone 6 plus but recently incomming calls are not coming thur it gets sent to voicemail and i get WhoCalled Alerts of the phone that didnt get thur. I contacted 611 few days ago an they reset the switch and now the problem is still happening has anyone had this problem? any rep come across this problem before? help! its fustratiing not able to answer incoming calls when wifi calling is on. I had to turn the feature off!