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
If you’re having trouble receiving messages from Android users on your iPhone, it can be pretty frustrating. There are a few possible reasons why this might be happening, and while it could seem a bit technical at first, it’s usually not too hard to fix.
The first thing to consider is whether the issue is related to iMessage. Since iPhones use iMessage to send texts between Apple devices, and SMS or MMS for Android, sometimes the phone can get a little confused. If you’ve recently switched to an iPhone from an Android, it’s possible that your old number is still registered with Android’s messaging services, and it hasn’t fully transitioned to iMessage yet. That’s when texts from Android users might not come through properly. You can check if iMessage is enabled by heading into Settings, scrolling to Messages, and making sure iMessage is turned on. If you’re connected to Wi-Fi or cellular data and iMessage is active, the problem might lie elsewhere.
Another thing to try is toggling your phone off and on—kind of a classic fix, I know, but you’d be surprised how often this works. Sometimes a simple restart can refresh network connections and fix glitches.
If you have problem persist after trying these solution, you can follow for more details instruction below.
https://thegeekpage.com/iphone-not-receiving-messages-from-android-fix/