No. you cannot use jio sim card in this phone.
No. This is without camera samsung feature phone. Guru Music 2 do not have camera.
No. Guru Music 2 do not have Bluetooth.
Yes, You can configure speed dial in this phone.
Samsung B310 comes with 800 mAh battery. But it is very efficient. You do not require to charge the phone for almost 3 days with moderate usage.