Yes, you can use SD card in this phone.
No. Samsung Metro 350 do not support CDMA networks.
Yes, Samsung Metro 350 does have Facebook App pre-installed.
Yes, Samsung Metro 350 does have Hindi language option.
Samsung Metro 350 has quite good battery backup. It comes with 1200 mAh removable battery and on a single charge it can last up to almost almost 4 days.
