Jio is one of the most intelligent networking company of all now in these days.but there is great drawback for jio services is that this sim would not get signals till the data is set to jio service .due to this we could not use dual sim .this is why some of them are in an hope that they cannot use there other sims for their work.and also a main draw back is jio apps doesnot work untill we set jio as our main sim .so if jio changes this options it would be a improvement also.