I have had this annoying notification on one of my T-Mobile S7s for the last 3 months, but I haven’t really looked into figuring this out until this weekend.
Attempted all of the following with no success:
- Basics, rebooting, reseating SIM, etc.
- Disabling Voice over LTE
- Carrier shortcodes for disabling all forwarding, requested ISP tech support to remove all forwarding from their side
- Requested over-the-air SIM refresh from ISP (and rolling my eyes when the tech suggested I factory reset the phone before troubleshooting would continue)
- Setting SIM in an iOS device and re-running all shortcodes. (Sometimes I really do use iOS)
Upon putting my SIM into another known-good Samsung, and receiving the same annoying notification, it was clear it had nothing to do with my phone.
Took it into the ISP this AM and asked for a SIM swap. Notification now gone.
What’s most interesting about all of this, is it happened after I went on a work trip to a foreign country that is commonly associated with APTs. Potentially just a coincidence, but looking over Google doesn’t reveal any specifics on how this even gets turned on, nor anyone else having better luck figuring it out what caused it.
http://forums.androidcentral.com/samsung-galaxy-note-7/713205-persistent-video-call-forwarding-notification.html