I’m using this phone since december 2015. it’s very nice phone without any problem, camera funtastic, charging level aslo normal, figerprint scan awesome in this range and other operations are quite amazing at least in this price range.yes jio sim also 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 perfectly both calls and net through JIO4G voice app. today I tested. it’s fine and superb.