Verizon...Oh boy...

I recently got a laptop (a Sony VAIO VGN-AR630E), and on the display unit there was a sticker that said that it has an EVDO card in it. I got it because my spouse kept complaining that I wasn't 'portable' enough'. Like millions of people of people with epilepsy, I am unable to drive.

That being the case, I thought "Hmm, since I'm 'portable' now, mobility options seem good, right?" I then proceeded to see how much EVDO service costs. My dad previously had AT&T/Cingular, and got good reception. However, he recently got DSL, and thought "Hey, I'll consolidate my bill and have it all on one bill!" Alas, after he canceled AT&T and got the phone (after much hassle), it was essentially a brick. Why, you ask? Because the tower is right over the mountain, and he lives past it's line of sight.

So, currently he has no phone (aside from his landline). And no long distance.

So, a tough question ensues: Can I do the following:

1. Go to the local Verizon store.
2. Pick a service plan.
3. Go to the local AT&T store.
4. Get the cheapest "pay-as-you-go" plan.
5. Update the roaming (transceiver) profile on the AT&T phone.
6. Update the roaming (transceiver) profile on the Verizon phone.
7. Using the laptop's SD card reader (possibly with an adapter) download the SIMs of both phones.
8. Find the differences between the two provider's roaming lists.
9. Make note of the differences, note which towers are in AT&T profile but not the Verizon profile.
10. After making a copy of the Verizon SIM file, open it with a SIM editor and add said AT&T towers to the Verizon profile.
11. Mod the profile so that when it is in range of a AT&T tower to masquarade as one of their supported phones.
12. Get a quad-band phone that's able to operate on both frequencies.
13. Cancel AT&T service.
14. Upload file to new SIM card.
15. Bingo! Verizon service in an AT&T territory.

The other option would be to swap out the EVDO card for an HSDPA card, keeping the EVDO card for when I get out of range. However, that would be more expensive.

Any suggestions?

CDMA phones aka Verizon do not have sim's card in them...so that basically nulls all your attempts at trying to do this.....sorry.

OK....so is there any way to extract the roaming profile data from the phone's NVRAM?

First of all, the technology used in the radios are different, cdma and gsm do not connect to the same towers. Secondly, gsm sims and phones do not have the same information that cdma phones do. An att sim contains info that identifies it as att and then contains enough info to identify the subscriber. A sim activated several years ago works as well as a brand new one.
Your verizon will have entirely different info on it, and needs to have tower info that needs to be updated periodically.