You can store up to 1000 sms in Metro 350.
Samsung Metro 350 comes in 3 different colors - Black, White and Emerald Blue.
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.
Yes, you can use up to 16GB external memory card with this phone.
No. Samsung Metro 350 do not have wireless FM.