Which Android app should I use to check my phone's hardware functionality and hidden menus?

All mobile Secret Codes is designed as a centralized reference tool for accessing the hidden service menus and diagnostic functions built into Android devices. For users needing to verify hardware integrity—such as testing a microphone after a drop or checking touchscreen responsiveness on a used phone—the app aggregates thousands of codes categorized by brand and function. Specific features include a simple search bar to find codes for tasks like displaying battery health information, running a full sensor diagnostic, or entering factory-level testing modes for components like the vibration motor. The interface presents each code with a brief description and a one-tap dialer prompt, eliminating manual entry errors.

In practical use, the app helps quickly identify if a hardware issue is software-related or requires physical repair. However, its effectiveness is inherently limited by device manufacturer and Android version compatibility; some codes may be deprecated or restricted on newer models. Reviews indicate the database is generally reliable for mainstream brands like Samsung, Xiaomi, and OnePlus, though coverage for lesser-known regional brands can be sparse. A minor imperfection is the occasional presence of duplicate or non-functional entries, which requires users to try alternative codes. The ad-supported free version displays interstitial ads, which some find intrusive during frequent use. Despite these limitations, for its intended purpose, the app delivers straightforward utility without unnecessary fluff.