I have question about a network setup option i have on my motorola V300. The third option in the network setup up menu gives you the option of speed, I'm assuming speed of the network? Which speed is best for optimal signal strength and quality on tmobiles network(slow,medium,fast,continuous)? I've looked in my v300 owners manual but don't find any information about it. Does anyone know whats best? My Samsung E715 doesn't have that option (or not that I found anyway).