Your ASUS ROG Phone 9 sounds perfectly clear in your own head, but the people you call keep asking you to repeat yourself, your in-game voice chat cuts out mid-match, or a voice clip plays back as dead silence. On a phone built around fast, low-latency communication, a microphone that drops your voice is a genuine problem, and it can surface on calls, in recordings, or only inside one stubborn app. The encouraging part is that the ROG Phone 9 carries three microphones (the official ROG spec sheet lists Tri-microphones with ASUS Noise Reduction Technology), so one blocked or confused mic does not automatically mean broken hardware.
Work through the fixes below in order. They begin with the quickest, safest checks and move toward a full reset and a service visit only if the simple steps come up empty. Most microphone faults on this phone trace back to a physical obstruction, a temporary software glitch, or a single misbehaving app rather than a dead component.
Take Off the Case and Clear the Mic Openings
The single most common cause is a physical one. A thick case, a stick-on screen film, pocket lint, or dust can sit over one of the three mic holes and muffle or block your voice. Because the ROG Phone 9 spreads its microphones across the body, even partial coverage of one opening can noticeably drop your audio.
Remove any case or screen film, then inspect each mic opening under good light. If an opening looks dirty, clean it gently, for example with a soft, dry brush. Never poke the openings with a pin, a needle, or anything sharp, since that can damage the microphone behind the hole.
Record a Quick Clip to See If the Mic Itself Works
Before you change any settings, find out whether the hardware is even at fault. Open the bundled Sound Recorder app, record a few seconds of speech, then play it back. ASUS recommends this app as the direct way to test the microphone on the phone.
If your voice records clearly, the mics are doing their job and the trouble lies elsewhere, most often a specific app, a weak signal, or the other person's device. Weak network coverage can degrade call audio even when the microphone is fine, so it helps to place a test call where your signal is strong. If the recording comes back silent or very faint, keep working through the steps that follow.
Check the App's Microphone Permission
If your voice records cleanly in the Sound Recorder but one particular app cannot pick it up, that app may simply lack permission to use the microphone. Every Android app needs your approval before it can reach the mic, and a permission that was denied, or that reset after an update, leaves that one app silent while everything else works.
Open your phone's Settings, find the affected app in the apps list, open its permissions, and make sure microphone access is allowed. Reopen the app and test again. If you recently updated the app or restored the phone, this permission can quietly revert, so it is worth checking even on apps that used to work.
Reboot the Phone to Clear a Temporary Glitch
A normal restart closes background processes that may have locked, muted, or frozen the microphone, and ASUS lists rebooting among its microphone troubleshooting steps. Hold the power button, tap the on-screen restart option, and let the phone come fully back up.
Once it is back on, test the mic again with the Sound Recorder or a short call. Many intermittent mic faults, particularly ones that appear after a long gaming session or days of uptime, clear with this single step.
Switch Off Wi-Fi Calling When Voice Calls Sound Rough
If the microphone seems fine in recordings but your voice is broken or inaudible specifically on calls, and your Wi-Fi connection is weak, Wi-Fi calling may be the culprit. Routing a call over a shaky wireless network can garble the audio the other side receives.
ASUS recommends turning the feature off in this case. In the Phone app, open Phone App > Click the icon at the right-top corner > Settings > Call > Wi-Fi calling > Disable Wi-Fi calling. With Wi-Fi calling off, your calls fall back to the mobile network; place a test call afterward to confirm the other person can now hear you.
Install the Latest System Update
Firmware bugs can affect audio routing and microphone behavior, and ASUS releases updates that fix exactly these kinds of issues. The ROG Phone 9 shipped on Android 15, and ASUS later released Android 16 firmware for it, so an available update is worth installing if you have not done so.
Go to Settings > System > System update > Check Update and follow the on-screen steps to download and install anything pending. During the update, charge the phone with the AC adaptor or keep it at a minimum of 15 percent battery so it does not power off partway through. Test the microphone again once the phone restarts on the new firmware.
Use Safe Mode to Catch a Misbehaving App
If the mic works in the Sound Recorder but fails elsewhere, a downloaded app may be seizing control of the microphone or interfering with it. Safe Mode loads the phone with only its built-in apps, which lets you test whether something you installed is to blame.
To enter it on a phone that is already on: long press power key, tap and hold Power Off, then tap OK of the Reboot to Safe Mode window. A "Safe mode" reminder appears at the lower-left of the home screen once you are in. Test the microphone now; if it works in Safe Mode, a third-party app is causing the fault. Restart the phone to exit Safe Mode, then uninstall recently added apps one at a time until the problem disappears.
Force a Restart When the Screen Is Frozen
Sometimes the mic fault arrives alongside a hang, a frozen screen, or an unresponsive phone that will not let you reboot normally. In that situation, force the phone to restart.
- 1.Press and hold volume down and power simultaneously for at least 8 seconds.
- 2.If it doesn't restart after 8 seconds, try pressing and holding both buttons for 12 seconds.
If you need to force the phone off instead of restarting it, press and hold volume down and power simultaneously, and once the screen turns off, immediately release both buttons. This guidance applies to ROG Phone 3, Zenfone 7 and later, which includes the ROG Phone 9. After the phone is back up, recheck the microphone.
Back Up and Erase the Phone as a Last Software Step
If every step above fails and the Sound Recorder still cannot capture your voice, a factory reset is the final software measure before hardware service. This is a clean-slate step, so back up your photos, messages, and any other important data first. ASUS warns that with a reset, "all data, apps, settings and personal information will be removed" from the device.
When your backup is safe, go to Settings > System > Reset options > Erase all data (factory reset), tap "Erase all data" (unlock the screen if prompted), then confirm "Erase all data." Once the phone reboots and finishes setup, test the microphone before reinstalling all of your apps; that way, if a single app was the cause, you can spot it.
Reach ASUS Support When the Hardware Needs a Look
If the microphone still does not work after cleaning the openings, testing in the Sound Recorder, checking permissions, updating, isolating apps, and resetting, the fault is most likely in the hardware itself. At that point, software steps cannot fix it.
ASUS's microphone and power guidance both end by directing you to contact ASUS Product Support or an authorized ASUS service center for inspection or repair. Have your purchase details and a quick summary of the steps you already tried ready, since that helps the technicians move straight to a hardware diagnosis.
Frequently Asked Questions
Why can people hear me sometimes but not on every call?
Inconsistent call audio often points to signal quality rather than the microphone, because weak coverage can degrade what the other person hears. Try a test call where your signal is strong. If your Wi-Fi is poor, turning off Wi-Fi calling (Phone App > the icon at the right-top corner > Settings > Call > Wi-Fi calling > Disable Wi-Fi calling) can also clean up broken call audio.
How do I tell whether it is a hardware fault or just software?
Record yourself in the bundled Sound Recorder app and play it back. If your voice comes through clearly, the mic hardware is likely fine and the issue is an app, a weak signal, or the other caller's device. If the recording is silent even after a reboot, a Safe Mode test, an update, and a factory reset, the problem is probably hardware and warrants a service center visit.
Will a factory reset definitely fix my microphone?
A reset only helps if the cause is software, such as a corrupted setting or a stubborn app. It will not repair a physically damaged microphone. Because the reset removes all data, apps, settings, and personal information from the phone, back everything up first and treat it as a last resort before contacting ASUS support.
Is it safe to clean the microphone holes myself?
Yes, as long as you are gentle. Remove anything blocking the mic, such as a protective case, and clean a dirty opening lightly, for example with a soft, dry brush. Do not insert pins, needles, or other sharp objects into the holes, since the ROG Phone 9's microphones sit just behind those small openings and are easy to damage.
