Before listing, I checked Wi-Fi connection, initialization, camera, charging, browsing, and video playback. Even without a contract, you can use compatible apps, games, the internet, etc., by connecting to Wi-Fi. Initialized. No usage restrictions. For an active everyday life, ultra-long battery life. This is a SIM-free smartphone with an ultra-long battery that you wouldn't expect from its compact 5.2-inch body. It is equipped with a large-capacity 4,100mAh battery and an advanced dual-lens camera. Dual Rear Cameras Capture the world widely, in a wide view. The dual-lens camera makes taking photos with your smartphone more enjoyable and expressive. The 13-megapixel main camera allows you to take brighter and clearer photos. Front Camera Selfies beautifully, anytime. Equipped with an 8-megapixel front camera and a soft light LED flash that gives a natural skin tone and a soft impression. Beauty Mode More beautiful, more fun, more like yourself. The latest beauty effects enhance your beauty and allow you to finish your photos to your liking. ASUS PowerMaster Manage your battery more intelligently. The ASUS PowerMaster™ allows you to efficiently manage the large-capacity battery, such as optimizing battery life and changing battery modes. With the function to extend battery life by about 2 times, you can reduce battery degradation and use it for about twice as long as a typical smartphone. OS: Android 7 CPU: Snapdragon 430 MSM8937 Number of CPU cores: Octa-core Internal memory: ROM 32GB, RAM 3GB Battery: 4100 mAh