Originally Posted by glassprisoner79
i've noticed that at times, during a fone conversation, the network goes from 3G to GPRS. i live in the heart of los angeles, so cell towers shouldnt be an issue!
also, just a question in general about networks. when i turn on the wifi and it goes into UMA mode, does that make for higher quality calling/talking, or does that only have to do with specific wifi calling? if it'st he case of higher quality talking, i will turn that on when i'm home, because to me that's worth the extra drain of battery!
I'm not too surprised.
Back in the day (2001) T-Mobile USA purchased towers from AT&T Wireless/Cingular in Los Angeles (which had converage exclusively and T-Mobile clients roamed there). This was back in GSM/GPRS days with EDGE just finished being deployed.
That said is there any SPECIFIC documentation that T-Mobile has stating that area you're experiencing issues in is covered by AWS 3-G?! If not then that is why you're getting shifted down from 3G during calls; OR that the towers closest to you are:
b) Congestion and network is switching your coverage preferenced based on available spectrum.
c) something on switch/relay or whatever its called is causing issues.