I used a local Vodafone SIM when visiting India.
Assuming you have enabled plus code dialing on CDMA as described
here, all I had to do was use a registry editor (I used Total Commander) to set HKLM\Software\OEM\PhoneSetting\PlusCodeDialing\Plu sCodeEnable to 0 instead of 1.
Another user on XDA complained that his phone would not restart after making this change. I am not sure if he was using Energy ROM or the stock ROM. Another option would be to delete the HKLM\Software\OEM\PhoneSetting\PlusCodeDialing tree altogether and set HKLM\Software\OEM\PhoneSetting\HiddenPlusCodeDiali ngPage=1. I haven't tried this route though.
Note: The forum inserts spaces in the registry keys. There should be no space in "PlusCodeEnable" and "HiddenPlusCodeDialingPage" listed above.