Should I be alarmed about this?

Not my phone number:

 

ATT most likely assigns you a telephone number to your sim card for your 3G iPad. They have to, and they can't assign it your current ATT phone number, so they have to give you a new one.

Even if you bought a wireless card for your laptop, one of those USB modems, you get a phone number. It's just there to work though, you couldn't call with it or anything most times.

 

That's what I found out.

The iPad 3G account is treated as a prepaid account. Not associated
with your wireles account at all.

John

 

nothing to be alarmed about here