AT&T doesn’t have good 3G coverage where I live, work, and travel—will it work with Verizon or T-Mobile instead?
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Not at the moment. Although the 3G-enabled iPad will ship unlocked—meaning it won’t be tied to a particular network—the device uses a GSM chip that’s incompatible with Verizon’s 3G network. T-Mobile is a GSM network, but its 3G data runs at 1700MHz; the iPhone’s 3G components support 850, 900, 1800, and 1900 MHz GSM/EDGE, and 850, 1900, and 2100 MHz UMTS/HSDPA. Bottom line: the iPad won’t work on T-Mobile. Beyond that limitation, the 3G-enabled iPad requires a micro-SIM card for mobile-network access; currently, AT&T is the only U.S. carrier using these cards. (Other international carriers also use mini-SIM cards). If you want to use an iPad with another cellular network, your best bet is to just buy the Wi-Fi version and a Wi-Fi-based cellular modem, like the Novatel Wireless MiFi. You’ll have to pay for a plan, but you can use that wireless connection with your laptop, iPad, or any other Wi-Fi-capable device.
