Moderately large, the device fits comfortably in your hand, because it is very thin. Among other "advantages": the build quality of the case, protection from water, dust. It is recommended to glue the film on the glass immediately. A case is needed, because the back panel is very slippery. The rest of the phone is admired by users. Modern OS with the ability to upgrade to version 5.0,RAM with a capacity of 3 GB, a powerful processor remove any restrictions, allowing you to download and install "heavy" applications. The built-in memory of 16 GB is expanded by a flash card up to 128 GB. In conditions of multitasking, the device "flies", and the battery seems simply "unkillable": its charge lasts for a day or more in active mode. The main camera with a resolution of 20.7 MP takes high-quality pictures. The captured video can be watched even on a large TV screen. The second 2.2 MP camera is designed for selfies, Skype. Listening to music on such a device is a pleasure due to stereo speakers. The sensor is responsive. The phone has an FM radio, built-in GPS satellites, which are picked up quickly. The data transfer rate over the wireless connection is very high. You can connect the device to a computer without a cord using WiFi. The disadvantages are subjective. Download games and apps for Sony Xperia Z3.