新スマホ故障診断 is a utility tool available on the iPhone platform developed by NTT DOCOMO INC. This program allows users to diagnose potential malfunctions in their smartphones by selecting symptoms or automatically diagnosing issues related to communication status, software version, storage, sensors, and more. Based on the diagnosis results, the app provides guidance on improvement methods and various procedures such as repair, replacement, or model change.

The diagnostic items cover various sensors, battery and charging status, mobile network connectivity, Wi-Fi and Bluetooth chipset, location services, internal storage read/write, screen functionalities, call-related features, buttons, cameras, flash, and software versions, among others. It is important to note that the app requires iOS 12.0 or above and may incur data charges for downloading, updating, or using certain features that involve data transmission.