I stream audio in Xiia lite. When the Sensation switches from 4g to 2g, my connection drops & doesn't reconnect automatnetically until I open the app. I checked out Settings> Wireless & Networks> Mobile networks> Network Mode. Selecting "WCDMA only" forces 4g only & doesn't affect talking & browsing, but talking may result in more dropped calls/data outages depending on the 4g coverage in your area since switching to a more reliable 2g signal won't happen. Philly has great 4g coverage, my very reason for leaving Sprint (but keeping my Evo as an 4.3" tablet).