Gsm Att
what does it mean when it says:NEW BLACKBERRY STORM 9500 GSM UNLOCKED ATT T-MOBILE PDA?
It means the device is not "locked" to any service provider as most contract phones are, preventing use with other mobile service providers. The device runs of the GSM network and is compatible with AT&T and T-Mobile OR any other mobile service provider using GSM technology. FYI --- it is not compatible with either Verizon or Sprint, which run their networks on CDMA mobile technology.
EDIT: All that's needed to activate the device is a SIM card from a GSM service provider.
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