Yes, Samsung Metro XL is a dual sim 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.
Yes, Charger is included in the standard packing.
Yes, Metro XL comes with pre-installed Facebook App.
No. This is not android phone.