Compare prices.

Helio does have great plans but the phones are costly.

With the basic helio all in plan you get 500 minutes for $65/month. And you get unlimited text data and all that jazz. The only EVDO provider that will succeed and pretty much kill the competition.

The Tilt with ATT

You get service with ATT/Cingular. Nothing really great about them. Roll over minutes. Data plans outrageously over priced. For the same price of around $150 to get a data plan and so forth you can get a Unlimited everything with Helio. But companies have pretty costly phones. Helio is pretty new. But then again they've been around longer than Cingular. SK Telecom does a great job in Korea.

But shop around. Do your research. A lot of people I've sold phones to. Don't do the research and I usually end up giving them something else that is more suitable for them.