Built-in diagnostics vs. a browser hardware test
Most phones and laptops include a manufacturer hardware test. They're good at finding failed memory, drives, batteries and disconnected parts, but they're often hidden behind secret codes or startup keys, blocked on carrier phones, or missing after a reset. They also rarely check what you notice day to day: a single dead key, a touch dead zone, a crackling left speaker, a blurry webcam or slow Wi-Fi.
The free phone diagnostic and laptop test work on every brand in the browser and cover those everyday parts, with a report you can share. Use both: the built-in test for deep hardware faults, and the browser test for everything you touch, see and hear.
Frequently asked questions
How do I run a hardware diagnostic on my phone?
Samsung Galaxy phones have the *#0*# test menu and Samsung Members diagnostics, Google Pixel has the Pixel Diagnostic app, and iPhone reports battery health and replaced parts in Settings. For any brand, open mxmob.com/check in your phone’s browser to test every component.
How do I run hardware diagnostics on a laptop?
Macs have Apple Diagnostics (hold power then Command-D on Apple silicon, or D on Intel), Dell has pre-boot diagnostics with F12, HP has F2 diagnostics after pressing Esc, and Lenovo, ASUS and Acer have apps with hardware checks. For any laptop, open mxmob.com/laptop-test in the browser.
Are hidden diagnostic codes safe to use?
The codes in these guides only open test or information screens and don’t change settings. Avoid codes from unknown sources, since some reset settings or open engineering menus.