Calling with jio is a stressful job to do first of all phone doesn’t connect even if it is connected it will drop prematurely you may roam around the corner of your rooms but I still it won’t connect the only purpose of using jio is its Internet connectivity I do you suggest to get any other network provider for voice calling and use jio for net connectivity or else you may have to face frequent call drops( if it’s connected) or you may miss important call