AT&T Blackberry Curve 8300 Smartphone "543" Questions

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...comes on and then it just jumps to a square box with with a line going through it with the number 543 underneath, please help! Turn the phone off. Take the battery out and wait about 30 seconds.

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...a blackberry curve, i have inserted the sim card and battery but a picture of tape with the number 543, i cannot do anything else could someone please help Henry It sounds like there is no operating ...

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Question about AT&T Computers & Internet

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...inside a larger rectangle, inside a circle with a line through. And underneath the symbol is says '543.' Any suggestions? you must fullflash your BB to work it again.you can use desktop manager 4.7 ...

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