In Samsung Duos259, there is no CDMA data usage settings, internet browser is through GSM operator only. Also it has only a generic browser,'opera' will not work in it. In Samsung DUOS TOUCH (SCH W299), CDMA browser is present but only a generic browser and no 'opera' as in Duos259. If you can satisfy with CDMA+GSM single standby phone without a R-UIM slot, you can opt for BlackBerry 8830. But these phones are not economical and cost effective.The new entrant in CDMA+GSM dual standby category is Micromax GC400 ( http://www.micromaxinfo.com/products/gc400.html ) with 3 mega pixel camera for Rs 5000/- But I suggest you to buy two handsets, one CDMA EVDO Rev A handset like LG510 for high speed data usage( http://www.lg.com/in/mobile-phones/all-phones/LG-LG510.jsp ) and one Nokia GSM basic handset. You can buy both this handsets for Rs 9,000/- while Samsung Duos Touch alone costs more than 10,000/-