Not a good mobile. Automatic restarts problem. After one month display become blurr. Sometimes overheating issue and hangs alot. sound quality is good and loud but not that much loud like china made. Touch is good but not much like average touch quality. It support almost all the application. yes it supports 4g it support gio sim.Overall bad mobile. my advice dont waste your money in buying this phone. Major problem is its display become blurr or poor in one month only.