I spent about 4 hours myself on with txt support last night, both sprint and airave support, only to find I'm still having the problems. As always first things they had me do also is hard reset after a soft reboot. First off, does that ever fix a problem? It just pisses me off that I lose everything. Anyway after multiple reboots and profile updates it came back when updating profile while airave is unplugged, then plugging it back in. But overnight it stopped working again. Additionally, not only do I get text send errors, but I get repeats of any texts that come in, about every 20 minutes or so, so I get about 100 texts and can't reply to anything. They now suggested that it's a software issue and i get a new phone since I'm in the 14 day warranty period. Also, as with you, the phone worksmperfectly while roaming or on regular network. It's only with the airave. This makes me mad as he'll as it's an awesome phone.
OK, looks like I have the same problem as others with the Airave and the Epic Touch. I was fortunate enough to be able to upgrade my phones (thanks Sprint!) but I'm having issues now. While connected to my Airave, text messages fail to send. I've tried updating the profile, PRL, rebooting, etc with no luck. As soon as I unplug the Airave then the text messages will send again.
If I plug the Airave back in and let it complete it's power on cycle, the text messages will continue to work however eventually they stop working again. This problem is occuring on both of my new Epic Touch phones but it did not happen on my old Intercepts. I have the newer Airave. I just sent a message to support but I guess I will probably have to call and speak with a tech. Has anybody with this issue get it resolved or am I going to have to stop using my Airave?