There are only two differences between the G4 Plus and G4. The first is atiny extra sensor in the camera module for laser autofocus and the second is a small square at the bottom of the screen. The latter is the fingerprint sensor and it’s rather good, if a little ugly. The soft touch finish on the rear is reasonably grippy, but does get greasy quit easily. Pop the back off and there’s access to a microSD and and micro SIM tray. A nano SIM adapter is included. The battery is not removable, however. Well, not without removing screws and voiding your warranty.