Deep thanks to the genius Turboccc, and Kanopus
For my case i have 3760 with SW 4.70 and i have done
1. patching with RGN result is activating command voice thanks to Turboccc and RGN tool
2. Again modifying file fm_all to replace all 11 counts which were already patched with RGN to B0B0 and got 3d enabled thanks to Kanopos while my garmin is For MENA

I guess there may exist some region that can enabled both calander and contacts for 3760
Did Turboccc find it or any one if so please can u provided me with Hex Addr and values??
Again thanks to Turboccc, and Kanopus