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Test Mode and Upgrade FW 1.0 to 3.0


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Hello From Romania , This first question from my new 900BT ,

I buy from my friend this Europen version ( Buying from Italy ) but it is FW 1.0 ,

CAN I UPGRADE DIRECTLY FW.3.0 or ? i must firstly upgrade 2.0 and after than FW 3.0 must be ?

 

Which one the working version for the test mode ? and what can i do with it ?

 

How can i make one backup for the all systems files,

( If somethink wrong on upgrade after then can i use this back up ? and how ? )

 

regards ..

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