Yes, Samsung Metro XL does have FM radio.
Yes, Samsung Metro XL supports the Kannada language.
Samsung Metro XL comes with 1 year manufacturer's warranty.
No. Samsung Metro XL is a 2G mobile phone.
You can store up to 1000 contacts in Metro XL. In addition, you can store up to 250 contacts in each of your sim card. So, if you are using 2 sim cards, in total you can store up to 1500 contacts.