Hello, Regarding this voice quality test: http://reviews.cnet.com/8301-19512_...voice-quality-on-the-iphone-4s/?tag=cnetRiver I realize its not a scientific test but it really shows you a good example of what each one sounds like (I'm sure this can be argued but this is not the purpose of this post). It would appear (Sprint/Verizon) > ATT for strictly voice in the US. However, there is an iPhone 4S comparison speed test, it pretty much showed sprint was the worst. This leaves AT&T and Verizon, I am on AT&T currently, but I saw a recent post stating you CANNOT turn OFF 3G with *ANY* model of the iPhone 4S! I had planned to get an AT&T iPhone 4S, until I learned about that. Therefore, the AT&T model does not have any advantage (except doing voice+data at the same time) over the Verizon Model if 3G is on all of the time. Verizon seems "quicker" and lower latency if you view the video for the iPhone 4S speed comparison: http://www.slashgear.com/iphone-4s-speed-test-att-vs-verizon-vs-sprint-14188198/ Something else I've noticed as well now in > 3-4 different cities across the United States is while AT&T does have the "best/fastest network" yes it does, but only at 2:00AM-4:00AM localtime, when I re-run the speed tests at say noon or 5-6PM localtime it drops from 2-5mbps to 0.05 mbps, it is simply overloaded, and that's usually when you need/want to use it the most. How is Verizon's network in comparison? Sure it won't get 2(?) 5-6mbps download but what about at peak periods, how fast is Verizon compared to AT&T? Aside from voice+data at the same time, what are your thoughts? Which would you go with AT&T iPhone 4S, Verizon iPhone 4S or another choice? Thanks.