Unlocked cell phones are compatible with GSM carrier such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. Nubia Z20 smartphone was launched on 8th August 2019. The phone comes with a 6.42-inch touchscreen primary display with a resolution of 1080×2340 pixels at a pixel density of 401 pixels per inch (ppi) and an aspect ratio of 19.5:9. It also features a 5.10-inch touchscreen as its second display, with a resolution of 720×1520 pixels at a pixel density of 330 pixels per inch (ppi),. Nubia Z20 is powered by a 2.96GHz octa-core Qualcomm Snapdragon 855+ processor. It comes with 6GB of RAM. The Nubia Z20 runs Android 9 Pie and is powered by a 4000mAh battery. The Nubia Z20 supports Quick Charge 4.0 fast charging. As far as the cameras are concerned, the Nubia Z20 on the rear packs a 48-megapixel primary camera; a second 16-megapixel camera and a third 8-megapixel camera. The rear camera setup has autofocus. The Nubia Z20 runs Nubia UI based on Android 9 Pie and packs 128GB of inbuilt storage. The Nubia Z20 is a dual-SIM (GSM and GSM) smartphone that accepts Nano-SIM and Nano-SIM cards. Connectivity options on the Nubia Z20 include Wi-Fi 802.11 a/b/g/n/ac, GPS, USB Type-C, 3G, and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include accelerometer, ambient light sensor, barometer, compass/ magnetometer, proximity sensor, and fingerprint sensor. It was launched in Black, Blue, and Red colours. It bears a glass body.