All Mobile Secret Codes positions itself as a comprehensive repository for Android's hidden diagnostic and system commands. The application aggregates hundreds of USSD codes, engineering modes, and manufacturer-specific commands that typically remain undocumented in consumer device manuals. This centralized approach eliminates the need for users to search through fragmented online forums or manufacturer documentation when attempting to access device testing features. The core functionality revolves around categorized code listings including device information, factory reset options, hardware testing suites, and network diagnostics. Each code entry includes clear descriptions of its purpose and potential outcomes, with safety warnings for codes that could affect device functionality. The application organizes codes by functionality rather than manufacturer, though it does include device-specific sections for major brands like Samsung, Xiaomi, and Huawei. Execution requires manual code entry through the dialer interface rather than automated implementation. User experience varies significantly based on technical proficiency. The interface employs a straightforward list-based design with search functionality, though the organization could benefit from better visual hierarchy. Real-world usage typically involves technical troubleshooting scenarios such as checking IMEI authenticity, testing hardware components, or accessing factory reset options. The absence of automated code execution means users must manually input each string, which maintains safety but reduces convenience compared to one-tap solutions. With no user reviews available for analysis, the application's reception remains undocumented in public forums. The lack of visible user feedback makes it difficult to assess real-world reliability across different Android versions and device manufacturers. This absence of community validation requires potential users to rely solely on the developer's implementation and their own testing. The application's primary strength lies in its comprehensive code collection, though effectiveness varies by device compatibility. Limitations include potential obsolescence as Android updates deprecate older codes and the risk of users executing potentially damaging commands without understanding consequences. It serves advanced users performing device diagnostics more effectively than casual users seeking simple tweaks.