After November security patch update my phone got Locked to Band 3 + Band 5 CA and never getting connected to Band 40. Airtel in 2nd sim gets connected to B3 + B40 or B1 + B40 but Jio is always on B3 + B5.
As far i know Vodafone & Airtel don't allow queuing, only jio allows it. That's why they have concept of renewal & top ups. I am tempted to try annual plan ( current one expires in Feb 2020) for Jio but not sure!!!!☹