Okay everyone, let's make this simple.
The BlackBerry Storm series is distinct from most BlackBerry devices in that it carries both CDMA and GSM technology. That means that the Storm:
- Is natively coded to the Verizon CDMA network;
- Can, when your account is set to support world roaming, contact international GSM networks with registration through the pre-installed Verizon SIM card; and
- When unlocked, register on any GSM network using any replacement SIM card.
Verizon will unlock your Storm on request once you've had the phone for a certain number of months (three, I believe; it may be six), which represents the time needed to "earn out" the discount you got on the phone when you bought it.
If you have an AT&T or T-Mobile account, you can easily and transparently insert a SIM card for one of these (or any other) GSM network into your Storm, and it will connect and register on these networks. So
yes, it's easy to use a Storm on the AT&T or T-Mobile networks.
CDMA doesn't work like GSM. There are no SIM cards; registration is based on coding. So, as has been discussed here
ad naueseum, you cannot easily -- and probably cannot
at all absent inside connections to the companies involved -- de-register a particular device from Verizon and register it with Sprint, or vice versa. Therefore,
no, you will not be able to use a Storm on the Sprint network.
Just take this for what it is, or if you don't like the answer, start by studying the technology. If you figure out a way to hack and trick the systems into allowing your Storm to connect to Sprint, great; keep it to yourself, because it's illegal.
Cheers.
In summary...
