Samsung *#0*# diagnostic menu: complete guide
Samsung's *#0*# code can open a hidden Galaxy diagnostic menu for screen, touch, sensor, camera, speaker, and vibration tests. Here's what it checks and what to use when the code is blocked.
Samsung officially documents *#0*# as a way to open a hardware test screen on applicable Galaxy devices. Samsung’s support page connects the code directly to tests including display colors, receiver, vibration, sensors, touch, speaker, keys, front camera, black screen, and LED where available.
The code is not guaranteed on every Galaxy phone. Model, region, carrier firmware, enterprise policy, security settings, Samsung Phone version, and One UI build can change or block access.
How to try the documented code
Open Samsung’s own Phone app and enter *#0*# on the dial pad. Do not press Call. If the test grid opens, choose only a non-destructive hardware test and follow its on-screen behavior.
The exact grid can differ from Samsung’s example. A missing button is not proof of a fault, and a passing tile proves only that the tested function responded at that moment.
If the code does not open
Do not disable security controls just to force a hidden menu to appear. Use Samsung Members diagnostics instead: available tests and menu paths vary by device, country, and app version, but it is Samsung’s normal supported diagnostic route.
This article does not recommend undocumented code-list entries. Codes for firmware, radio calibration, reset, provisioning, or service programming can change device state and should not be entered from an unverified list.
Reading the tests
Solid-color and black-screen tests can reveal visible pixel or uniformity problems, but they do not certify the whole display. Touch tests can reveal areas that fail to register during the test. Receiver, speaker, vibration, sensor, key, and camera tiles show whether the selected function responds; they do not measure long-term reliability.
If a test fails, restart the phone, remove accessories that could interfere, update supported software, and repeat once. Persistent failure should be checked through Samsung support or an authorized repairer.
One UI 9 availability
Samsung’s live One UI 9 page says the official One UI 9 has been first rolled out to Galaxy Z Fold8 Ultra, Galaxy Z Fold8, and Galaxy Z Flip8 and is expected to roll out gradually to other Galaxy devices. Availability varies by model, country or region, carrier, firmware, and build.
That rollout statement does not guarantee that *#0*# is available on a particular device. Use the official code page for the code’s scope and Samsung Members when the dialer route is unavailable.
Sources
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