The phone becomes unusually warm when being charged rapidly, although this does not hinder its usefulness. Advantages that vary The lack of a waterfall screen and a hole in the screen are the key advantages—and the main reason for the purchase—and the good battery and odd hue, which varies from almost black to rich purple depending on the lighting are nice bonuses. Read on for some drawbacks: Only one thing stands out to me as a problem: the OS has a weird flavor after coming from the Huawei environment. 1) It has as few preinstalled apps as possible, including the bare minimum of Google's (phone, sms, play, youtube, chrome), Sony's specialized camera software, and the operating system itself. Those. Without additional software, you can't even jot down a quick note in text form. 2) Weird notification mechanism; it's not clear whether or not NFC and Bluetooth are turned on.