Android · Troubleshooting
Test hardware like screen, sensors, speakers
Phone diagnostics tools — built into some manufacturers' software or provided by your carrier — run guided tests on hardware components like the touchscreen, speakers, cameras, sensors, and buttons to confirm they're working correctly.
How to open Phone Diagnostics
- Look for a manufacturer app such as Samsung Members, or check your carrier's support app for a diagnostics tool.
- Alternatively, search for your model's manufacturer test/dial code.
- Run through the guided tests for screen, speakers, sensors, and buttons.
- Save or screenshot the report if you need it for a warranty or repair claim.
What you should know
- Samsung Members, carrier apps (like AT&T's or Verizon's), and dialer codes are common ways to access diagnostics on different phones.
- Tests typically walk through touch response, display dead pixels, speaker/microphone, vibration, sensors, and connectivity one at a time.
- Some tools generate a shareable report useful for warranty or insurance claims.
- A basic diagnostic set is often accessible by dialing a manufacturer-specific test code in the phone app.
There's no single universal diagnostics menu across all Android phones — availability and access method depend entirely on your manufacturer and carrier.
Why it matters
Running a structured hardware test can confirm whether a problem (like a black spot on screen or a quiet speaker) is a real hardware fault before you spend time on software fixes or take the phone in for repair.
Best practices
- Run a full diagnostic test right after buying a new or refurbished phone to catch defects within the return window.
- Save or screenshot a diagnostic report before a warranty or insurance claim, since some programs ask for proof of the issue.
- Test one suspected component in isolation (like just the speaker) rather than assuming a full diagnostic sweep is needed for a narrow issue.
Common problems and fixes
- Can't find a diagnostics menu on the phone at all.
- Check whether your manufacturer offers a dedicated app (like Samsung Members) or search your carrier's support site for a device-specific diagnostic tool.
- A diagnostic test reports a hardware failure.
- Save the report and contact your manufacturer or carrier's support for repair or warranty options — this isn't something a software fix can resolve.
Tips and tricks
- Search '[your phone model] hardware test' online to find the specific dial code or app your manufacturer uses, since it isn't standardized across brands.
Frequently asked questions
Does every Android phone have a built-in diagnostics tool?
No, availability varies — some manufacturers bundle one, others rely on carrier apps or dial codes, and a few phones have no dedicated tool at all.
Can diagnostics fix a hardware problem?
No, diagnostics only identify and report issues; actual repairs need a manufacturer service center, authorized repair shop, or warranty claim.
Related settings
- Battery UsageBattery usage breaks down exactly how much charge each app and system component has consumed since the last full charge, making it the go-to screen for diagnosing unexpectedly fast battery drain.
- Safe Mode & RecoverySafe mode is a temporary boot state that disables all third-party apps, making it easy to tell whether a downloaded app is causing a crash, freeze, or battery drain. Recovery mode is a separate, more powerful boot menu — accessed with hardware buttons before Android fully loads — used for wiping the cache partition, sideloading an update, or performing a factory reset when the device won't start normally.
- About Phone / System InfoAbout phone is the central reference page for identifying your exact device — model number, Android version, build number, IMEI, and serial number. It's the page you'll be asked to check during a support call, a warranty claim, or when confirming whether an app is compatible with your specific device.
More Troubleshooting guides for Android
- Factory ResetFactory data reset erases all data on your device and restores its original settings — useful for resolving persistent software issues, or before selling or recycling the device.
- Send FeedbackSend feedback lets you report a problem straight to Google (or an app's own developers) with an automatically attached diagnostic report and, optionally, a screenshot with areas you can highlight or blur out.
- Network & SIM DiagnosticsProvides tools to check SIM status, run network diagnostics, and reset APN settings to troubleshoot problems like no signal, failed calls, or data connectivity issues.
- App Crash & ANR ReportsShows a log of recent app crashes and 'Application Not Responding' (ANR) events, letting you identify which apps are unstable and access details useful for reporting bugs to developers.
- Reset Wi-Fi, Mobile & BluetoothResets Wi-Fi networks, saved passwords, mobile network/APN settings, and Bluetooth pairings back to factory defaults, without erasing personal files, photos, or installed apps.
- Reset App PreferencesRe-enables previously disabled apps, resets default app choices, clears background data restrictions, and restores notification permissions to default, without uninstalling anything or deleting personal data.