Verizon iPhone review -- Engadget
It gets worse!
But wait!Calls were consistently connected and uninterrupted, far more often than our AT&T calls
Oh noes!There are a few things you'll need to know about how the Verizon iPhone handles calls differently from AT&T. Firstly, you can't do 3G data and voice at the same time (but you knew this, Engadget reader!). We didn't find ourselves missing the feature very much, and you're still able to send text messages (and receive them) while on the phone. We're not saying you don't or won't need the functionality, just that it didn't sting too much to see it go (though admittedly, we were on WiFi quite a bit of the time). When using data on 3G, calls take precedent, but if you're in Verizon's 2G territory and using data, your call will go to voicemail. Another thing to consider is how Verizon's network handles multiple calls. You can add up to two people to a call, but after that, everyone gets shot to voicemail, unlike the AT&T phone, where the numbers go way beyond that.
A bigger issue may be that while using the Personal Hotspot feature (more on this in a minute), your calls will kill your connection. That means that if you're loading a page on your computer tethered to your phone and you get a call, the page stops loading and doesn't resume until the call stops ringing, or you hang up. It's a seamless transition, but still a bit jarring. If you're a busy person who is going to rely on this feature for connectivity and rely on the iPhone for important calls, this could be a serious issue.
It gets worse!
LETS SEE WHERE THIS THREAD GOES SHALL WE!? :lol:Let's put this as simply as we can: data rates on the Verizon iPhone 4 we tested were dramatically slower than those on its AT&T counterpart. How much slower? Well, even though network speeds fluctuate based on many factors, we didn't see the Verizon device peak much beyond 1.4 Mbps on downloads (and even that high was rare), and it barely hit 0.5 Mbps on upstream. On the other hand, the AT&T device regularly pulled down above 3 Mbps, and 1 Mbps or more going up. We'll admit that the Verizon speeds were more consistent, but the irrefutable fact is that AT&T's network is much, much faster, at least in our neck of the woods.