Acer E100/E101 Smartphone User Guide12LED indicatorInstalling a SIM cardTo take full advantage of your smartphone’s telephonycapabilities, you must install a SIM card. The SIM card holder islocated at the bottom of the battery bay.1. Turn off your smartphone by pressing and holding thepower button.2. Slide the battery coverdown then lift it awayfrom the smartphone.3. If necessary, remove thebattery as described in“Installing or removethe battery“ on page13.Color State DescriptionRed Steady Battery is charging.Slow flashing Battery charge is low.Flashes twicerapidlyBattery charge is critically low.FlashesrapidlyBattery level is too low to start the phone.Orange Slow flashing New event (missed call, new message,appointment, etc.)Green Steady Battery is fully charged; you should unplugthe charger.12