My Note 2 (4.4.2) randomly stops receiving texts or calls. Calls go straight to voice mail and I never receive a missed call notification. I won't receive voicemails or the texts until I send an outgoing text or place an outgoing call, then I receive the texts sent to me and any voice mail notifications. It seems only to be when I'm connected to any wifi. Even if I'm using my apps or internet I still miss the texts and calls until I send something outgoing. I have done a battery and Sim pull, updated my software, called koodo twice and have an open support ticket. My phone is on Gsm/wcdma auto connect and I've reconnected to the koodo network. I've been advised not to factory reset s it's not going to help. (I won't root the phone). I was advised by Bernard to post here in case you guys can think of something to try that we haven't tried.