I was wondering if it is truly possible to unlock a Verizon phone (BB storm) and have it work on the AT&T network? I see it out there a lot and was curious if thats true. I was thinking about trying out one of these phones cause I want to give BB a shot, but want it unlocked so that I still can use my $10 per month internet plan. Let me know what you all think/know about this. Thanks.

Verizon and AT&T use different Cellular technologies. Even if you could unlock a Verizon phone, it would not work on AT&T's network (Verizon phones are CDMA and don't use a SIM card, AT&T phones are GSM with SIM cards).

T-Mobile also uses GSM technology like AT&T. So yea, you can swap T-Mobile & AT&T (or any other GSM) SIM cards in unlocked phones.

However, AT&T and T-Mobile use different "3G" frequencies, so a phone designed for 3G on T-mobile will only work with the slower Edge/2G network on AT&T (and visa-versa). That's the thing that sucks. While the 5800 may be unlocked, you are still limited to AT&T if you want full 3/3.5G network speed.

check out this link. quad band, unlocked blackberry storms. no US 3g though...

http://www.dechowireless.com/store/product-info.php?BLACK_BERRY_STORM_9500-pid378.html

p.s. check out the VERTU phones too. ouch, pretty pricey!

Yeah I would love to try one of those out for a little while and see how it compares to our Nokia 5800. But those prices are way too high. I would like to find one on craigslist a lot cheaper.

Oh and after looking on Ebay too, they say the same thing. Unlocked BB Storm originally from Verizon unlocked for any carrier including AT&T and T-Mobile.

And FYI: Boost and Nextel use SIM cards as well, but those phone use IDEN technology, not GSM. So even though their SIM looks pretty much identical to an AT&T/T-Mobile SIM, they are not interchangeable.

You can not put a Boost/Nextel IDEN SIM in an unlocked GSM phone, or an AT&T/T-Mobile GSM SIM in a Nextel/Boost IDEN phone (well, technically you could, but it won't work).

Just in case CDMA and GSM wasn't confusing enough for ya.

Well after further review, I am gonna sell the BB Storm. It looks like it could be a very sweet phone, but it is not unlocked at the moment and I do not feel like paying for it to be unlocked. I read somewhere that BB devices use a special server that is controlled by your carrier. So you would have to sign up for the BB data plan. I was hoping to use my $10/month data plan. So I do not want to pay to unlock it and find out that I am right about signing for the more expensive plan.