Yes, Nokia 2 does have the FM radio.
No. Nokia 2 comes with non-removable 4100 mAh battery.
Yes, Nokia 2 is a perfect combination of Alluminimum Alloy frame and solid industrial grade Polycarbonate back.
Yes, you can use Nokia 2 as wifi hotspot.
It's not a bad phone, this Nokia 2. It's just that there's only so much you can do within a budget this tight.