You should make sure whether your blackberry is Unlocked or Not. If it is Unlocked it can be used with any sim card around the world.
If it is locked to any particular carrier, you have to unlock it.
Check our signature, we can help you to unlock your BlackBerry to any carrier.
hi if both of your palm pixi and blackberry storm mobile are unlocked to network then you can use any sim in it .if your blackberry strom is locked to network then it wont accept any network sim in it other than the locked network sim.to solve this you must unlock it .codes are the best method to unlock your mobile .to purchase codes visit prounlocking.com here they provide unlock code for all gsm mobile models along with the instruction about how to use codes in your mobile .once your mobile get unlocked then it will be free to all network sim.