Roamer国际漫游通话

4.5.5:- fixed crashes after updating4.5.4:- fixed auto pick-up of callbacks on Android 5.0 (Lollipop)- fixed hearing one side only during Internet calls on some devices- fixed some audio glitches during Internet calls- PIN code now automatically validates when you enter 4 digits- small UI improvements- a lot of performance improvements and optimisations