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Flight mode enter this seceret code *#3646633# chosse the ''mics'' then ''HIGH SPEED SIM'' swict on the high speed sim and your phone will restart automatically with dual mode. i use this procudure but its only key pad light on.not power on

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DO NOT DO AS DESCRIBED ABOVE !!!

If ever you do set your phone to 'high speed sim' it will never work again (unless you've got the knowledge to do a firmware reset ...)

Posted on Jun 12, 2009

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Posted on Jan 02, 2017

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