No, and yes, sadly. Dumb AT&T are keeping it at 3G, unlike Verizon and T-Mobile. If you really want 4G on your iPhone, then get the Verizon iPhone 4. Much better.
The IPhone 4's from Verizon are the same as the IPhone 4's from AT&T. The only difference is the service.
No, just a carbon copy of the AT&T iPhone, but on Verizon's network
No
No, Sprint does not carry iPhone 4. Only Verizon and AT&T.
Not at this time. Only the iPhone 4, along with the iPhone 4 White Colored.
no, they are the exact same phone just with different carriers.
Verizon and AT&T each use a different type of network. Because of this, an iPhone that is made for Verizon customers has a different type of cellular antenna inside than an AT&T version.
Yes. The iPhone 4 came out. For AT&T it came out on June 2010. For Verizon it came out on February 2011
It depends. Both of them can download and use over 200,000 applications and access data over a WiFi network, but the iPhone can also access data over a 3G network (AT&T or Verizon), meaning you can check your e-mail and browse the web anywhere you want on an iPhone. However, the iPhone requires a monthly payment to AT&T or Verizon.
No you can't. Only A T and T
The AT&T version of both the iPhone 3GS and iPhone 4 are built on what's called GSM radio technology (used by both AT&T and T-Mobile in the US). Meanwhile, Verizon and Sprint use a completely different technology called CDMA. The two standards are incompatible. They use different radios and operate on different wireless frequencies. So, no, you cannot take your existing AT&T iPhone and walk into a Verizon store and simply switch networks. Even if you own an iPhone 4 you will have to purchase a completely new iPhone 4 with CDMA chips in order for it to work on Verizon.