Apple may have locked the ipad to micro-sim and forces you to use AT&T. But you can always cut a regular SIM-card and it will work with the iPad. Micro-sim and regular sim-card uses the same chip. The iPad won't be able to tell the difference. I've a dataplan on my contract, I'm thinking of ordering a twincard and use 3g for free in my Ipad. Now, only multitasking is lacking. Then the iPad will be a hit!