I’m using this phone since december 2015. Its very nice phone without any problem, camera funtastic, charging OK, fingerprint scan awesome and other operations r quite amazing at least in this price range. Yes Jio sim works in it in sim1 tray and sim2 tray plays other sim in 3G. You just configure the APN settings change name to NET and APN Type to default, supl and one new apn created, again do the second time one more apn created. Choose last one to activate. JIO working fine both calls and net through Jio4Gvoice app. today I tested. its fine and great.