How do wireless companies know when you are using a Smartphone?

My husband gave me his old phone — a Smartphone. I have a very basic plan, but I liked the QWERTY keyboard and GPS. Somehow our wireless provider "knew" that I switched to a Smartphone and automatically billed me more for a data plan. How did they know? I assume the phone sends out some kind of signal. Do "quick messaging" phones (like the LG neon) do the same thing? Thanks


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Anybody have a smartphone with ATT? Lets talk rates and GPS.?

Greetings. I just received the ATT Tilt. I’ll be on Windows Mobile 6. I have a few questions:
- Is it possible to negotiate down the rate? I have a mandatory data plan.
- How good is the GPS? They have put me on .99 monthly GPS. IS ATT’s GPS system good?
- Can it use WiFi or Wireless internet connections without requiring it’s own ISP or Data Plan?
- Any other useful tips or advice for using a smartphone?


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Rogers Wireless BlackBerry 8110 Pearl with GPS

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