Yes, Vivo V11 does have the dual rear camera setup. The primary rear camera is 16MP and secondary rear camera is of 5MP.
Vivo V11 has a dual rear camera set up. The primary 16MP rear camera has an aperture of f/2.0 while the secondary 5MP rear camera has an aperture of f/2.4.
Yes, Vivo V11 has a 3.5mm headphone jack.
Yes, Vivo V11 does have the FM radio.