Data switch from Sim 1 to Sim 2 not happening

  1. W1559436732213
    Cupcake Dec 11, 2019

    W1559436732213 , Dec 11, 2019 :
    I have two sims - Airtel and Jio

    Once the data pack is over in one Sim, I switch to the other. However, since past 2 weeks I could see only Sim slot 1 is being used for data, even though I switch it in the settings. The switch is not reflected in the status bar either.

    I interchanged the sims and tried again. Still whichever sim is in slot 1 is only being used for mobile data.

    Please help