Hi,
Official Update can be used.
Language Pack 6: (arabic)
http://www.benq-siemens.com/cds/frontdoor/0,2241,hq_en_0_130289_0_xcs%253A130989_xcp%253A130797_pde135698%253A135726,00.html#anchor135698
or
Language Pack 5: (arabic)
http://www.benq-siemens.com/cds/frontdoor/0,2241,hq_en_0_130289_0_xcs%253A130989_xcp%253A130797_pde135698%253A135724,00.html#anchor135698
Not sure which one it is, you only need:
Update
Connect your mobile to the PC using one of the following cables compatible with your C72:
Data Cable DCA-500 (serial->serial) / Data Cable USB DCA-510 (USB->serial, use only COM port 1 to 9). Please note that the Data
Very easy to use!
Good luck with it!
Kelvin