can a cingular gophone sim card work in any att/cingular cell phone?

i have a cingular gophone simcard and may use it in a blackberry curve or a samsung blackjack from att
will it work?
ive used it in a blackberry pearl and a lg shine
so maybe..
im just making sure

yes a att (cingular) go phone sim card will work in any other att (cingular) cell phone i have a friend that has a att go phone and he does it all the time

Pinoy boy said:

i have a cingular gophone simcard and may use it in a blackberry curve or a samsung blackjack from att
will it work?
ive used it in a blackberry pearl and a lg shine
so maybe..
im just making sure

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You have to Unlock Blackberry and SAMSUNG phone Unlocked from network lock.Otherwise you cannot use the Cingular sim card...Your Blackberry Pearl and Lg shine are Unlocked Phone i think...So get the Unlock code from the ite for Blackberry Phone and Samsung Phone at Mobile-unlocker.com/blackberry/rs2wp8/ and unlock it.Then use any GSM Network Sim card.