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    UC923/UC924(E)/UC926(E) nned need to upgrade the fw920M.rom 

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    UC902 upgrade the fw902.rom, UC903 upgrade the fw903.rom, UC912 upgrade UC912(G) upgrade the fw912.rom, UC912G upgrade the fw912G.rom

    UC923 upgrade the fw923.rom, UC924 upgrade the fw924.rom, UC926 upgrade the fw926.rom.

  


If the DSP parameter of the phone with "D", then 

UC926U/UC926S/UC924U/UC924W/UC923U/UC921U need to upgrade the fw920U.rom 

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  For the new models

   UC501 upgrade the fw500M.rom,  UC503(G) upgrade the fw500M.rom,  UC505 upgrade the fw520M.rom,  UC507 upgrade the fw520M.rom.

   UC902S upgrade the fw910M.rom,  UC921(G) upgrade the fw910M.rom


   If you still can't distinguish, you can choose the corresponding file upgrade according to the interface prompt of the phone upgrade.

   

   

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