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These days, I heard that to make a callback call is saving money, But it is not convenient for my BB to dial a callback access number first, and then the destination number. Cause I store the destination number in mobile directory. So I searched Mr Unlocking mobile SIM auto dialer from internet, the web is www dot mrunlock dot net. Their SIM auto dialer can solve this problem, But I can not imagine that. It is a piggyback SIM adapter, you can prefix the callback access number in STK menu, after you dial the destination number in mobile directory, the Mr Unlocking SIM auto dialer will do the rest work automatically. How strange ! To make a call just as normal. Is there anybody use it? Who can give me a experience ? Thank you !