The phone runs on a 1200 mAh lithium-ion battery. The Galaxy Star's battery drains quickly, but with moderate use on a single SIM, it can last up to 2 days. The Galaxy Star GT-S5280 and the Galaxy Star GT-S5282 are almost the same, with the only difference between them being that the latter is a dual-SIM phone, having another SIM card slot. Only one SIM is used at a time; a SIM card manager in the device is used to switch between them. Unlike most other smartphones, the Galaxy Star runs on EDGE networks alone, and doesn't support 3G connectivity. It also does not provide a Global Positioning System (GPS). However it provides support for WiFi connectivity and Bluetooth 4.0. Like all other Samsung Galaxy smartphones, the Galaxy Star runs on the Android mobile operating system. It runs on a modified version of Android 4.1.2 Jelly Bean. Because of this, Samsung has stated that CPU usage is conducted in a more efficient way to ensure longer battery life. Again, as with other Samsung smartphones, the device also uses Samsung's TouchWiz UX Nature user interface as the default user interface, though it is also possible to use other third-party user interfaces. By default, as in other Android smartphones, Google's products such as Google Chrome, Gmail, Google+, Google Hangouts etc. are provided in the phone. The device also has access to the Google Play store, but being a low-end smartphone, new applications as well as applications requiring a large amount of processing power and memory cannot be installed on the device. Samsung's applications such as ChatON and Samsung Apps are also preinstalled, as in other Samsung smartphones. However games like Dead Trigger,Temple Run,Temple run 2,Temple Run oz, Angry Birds, Jetpack Joyride works with ease. The Samsung Galaxy Star has received mixed reviews upon its release. While it has been praised for its price, user experience and battery life, it has also been criticised for its small screen, lack of features and performance. Many users have found that the device's capabilities are basic, seeing it as a low-end smartphone. According to "The Times of India", the Galaxy Star looks "cute", has a decent screen, has a decent battery life and provides a good user experience, but has its drawbacks, with a small screen, low resolution and an underwhelming performance. "ReviewGuidelines.com" has praised the phone's memory, Wi-Fi, Bluetooth, touchscreen display and design, while criticising the lack of features and functionality.