You need a OMH Diamond sim only (with diamond symbol) and its RSN no. which is printed on the sim should start with RECRUC (ideally RECRUC06) series. That is supposedly working out of the box with this phone. My phone has arrived and is presently in Delhi. I should get it on Sunday whereby I will give a proper detailed report. But as per all reports you should not worry and this is the most ideal (CDMA or GSM) phone right now in India in the sub 10k range.
Port to GSM is bull**** !
RCOM already developgin 4G SIM for CDMA as well as GSM customer they just need to get new 4G SIM which will fallback to GSM network for calls !
NO NEED to PORT HERE and THERE !
4G SIM is in testing ! mya be available after 30 days in select circle ! in Few Circle they might have to surrender CDMA before the 4G SIM comes so they may force to get Temporary GSM by GSM porting ! But again 4G SIM have to be upgraded for GSM customer also /!