Blackberry 8300 ??
Does blackberry 8300 use SIM or short SIM ?
and also
How can I unlock a blackberry 8300 if the service is AT&T?
Answers: Yes the 8300 is GSM and uses a SIM Card. AT&T is GSM and uses a SIM Card you can unlock it by paying someone to do so( best option) such as:
www.unlock8300.com/ $20 for cingular (aka AT&T).
Or you can beg AT&T by calling them and recounting them your going out of the country this option is free but a long shot and you own to have an commentary with them or they won't budge, lift the easy route and spend $20 consequently you can put _ANY_ sim card in the world contained by the phone and it will work!
My cousin has a Blackberry 8300 and I can describe you that his definitely have a sim card. That said, we are in the UK and from my experience beside US contacts, phones in standard seem not to enjoy them so I can't be sure if a US AT&T phone will have a sim.
As for unlocking it, my cousins 8300 have been unlocked and he's used multiple sims from different providers so it does give the impression of being that they do have a sim, can be unlocked and typical unlocking procedures should work.
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