Hi all,
I was on the phone with Tmo support last night a few times. It seems there is a bug, and that the 8320 will disconnect for voice calls from UMA, even though it keeps the data calls over wifi.
Frankly, I wonder if this is a bug - I have an unlimited data plan, and coincidentally, that goes over my non-Tmo network just fine, but my minutes get used even though I'm well in range of my UMA enabled H@H network. Hmmm.
Well, here's what they said.
It's a known problem.
The solution, go to manage connections, and uncheck wifi. Wait for the wifi icon to disappear on the homescreen (which remains in the background), then recheck the wifi checkbox. You do not have to leave the manage connections app, but... the first time I did this, in order for UMA to pickup, I had to remove the battery, wait a minute, and restart the phone.
The Tmo customer service rep explained, it's a good idea to turn off the phone once a day anyways... something about updates being pushed the phone when I do? Never heard of such a thing, but now I turn my baby off once a day (or more), just for the hell of it.
My personal experience with this is that it drops the UMA quite often, but doing the uncheck/recheck does reconnect it reliably. I'm a bit annoyed, because it means I'm using minutes when I should be, but... tmo does have the best rates/plans. It is quite cool when it works though. And, I'm using my own router. My battery life is a full day plus, with the standard battery (I've though of updating to an OEM battery, same width, but longer battery life. no need yet.).
Call quality is very good over UMA - signal strenght is eh. But, it works in my NYC apartment. And, I don't really care about a hand-off between edge and UMA, I'd just like to have UMA work all the time when I'm in range.
Email me if there are other questions, I don't check the forum much.
David