In fact, 'DUOS' does not mean it really works with dual SIM card. It supports GSM and CDMA - yes, but not 2 GSM. That's probably the reason why they don't want to release it in other countries.
If it would support 2 GSM SIM cards simultaneously + 3G (and +Glonass desirable) I would be the first to buy it. Currently there's only GALAXY Y DUOS on the market - it's screen is too small and has low resolution.
oskie, 28 Apr 2012the word "duos"was used but it isnot dual sim..cheaters!hello its a dual sim only.use correct sims cdma and gsm.dont put both gsm
this phone is vary big 2 problem 1st not connect gsm internet
2nd is no batry life only 5 hrs only standby
so guys dont take this phone
SANJAY, 18 Apr 2012can we use gsm sim in place of cdma sim slot. i mean in place of cdma sim slot, gsm can also ... morecan we use gsm sim in place of cdma sim slot. i mean in place of cdma sim slot, gsm can also be used or not?