We have a number of crew who are unable to send/receive text messages (SMS) since our Balance 305 went in. iPhone messages go through, but Android does not.
We do have P2P/File Sharing blocked, but it’s not clear if that is the culprit.
Anyone know how to allow SMS?
For AT&T phones - AT&T Wi-Fi Calling LAN and VPN Configuration - AT&T Wireless Customer Support
For T-Mobile - NextDNS blocking all text/media messages - Discussions - NextDNS Help Center
All I can confidently say is that the AT&T on iPhone does indeed use 500 and 4500 constantly to make texts and calls work.
yes you may need to toggle the nat-t setting or whatever in advanced settings