Your ASUS ROG Phone 9 should pair with earbuds, a controller, or your car in seconds, so when the connection refuses to hold, drops mid-call, or the accessory never shows up in the list at all, the whole point of going wireless falls apart. The good news is that the ROG Phone 9 has full Bluetooth 5.4 (HFP, A2DP, AVRCP, HID, PAN, and OPP, with Qualcomm aptX Adaptive and aptX Lossless support), so a stubborn connection is almost always a settings, pairing, or software hiccup rather than a missing feature. Work through the fixes below in order, starting with the quickest and safest, and save the reset and support steps for last. Bluetooth is managed entirely on the device under Settings, so you do not need the Armoury Crate app or any other companion software for any of this.
Toggle Bluetooth off and on the right way
The fastest fix is also the one most people skip, which is simply switching the radio off and back on so it reinitializes. On the ROG Phone 9, open Setting > Connected devices > Connection preferences > Enable Bluetooth and confirm it is actually turned on. Once you have confirmed it is on, turn it off, wait a moment, and turn it back on again. The standard Android guidance for connection problems is to turn Bluetooth off and then on again, and this single reset clears a surprising number of stuck states.
Confirm the accessory is paired and connected
It is easy to assume a device is connected when it is only paired, or only powered on but not in pairing mode. Make sure the accessory is switched on, in pairing mode, and that it actually shows as connected on the phone rather than just appearing in the list. The Android troubleshooting steps list confirming that your devices are paired and connected as one of the first things to check, because a half-finished pairing behaves exactly like a broken one.
Clear interference and close the gap
Bluetooth is a short-range radio, and the environment around you matters more than people expect. ASUS notes that being near microwaves, cordless phones, or other wireless and electronic products, or being in crowded areas, can cause interference that disrupts the connection. Move away from those sources, reduce the distance between the phone and the Bluetooth device, and remove any obstacles such as metal that might sit between them. If the connection suddenly stabilizes when you step into a clearer spot, interference was the culprit.
Restart the phone, or force it if it is frozen
Restarting both the phone and the accessory often clears glitches that no toggle can fix, and the standard Android advice is exactly that, to restart your devices. Power the ROG Phone 9 down normally and bring it back up, and do the same for the earbuds, speaker, or controller if it has a power switch. If the phone is unresponsive and will not restart normally, ASUS gives a specific force-restart sequence for this model group.
- 1.Press and hold volume down and power simultaneously for at least 8 seconds.
- 2.If it does not restart after 8 seconds, try pressing and holding both buttons for 12 seconds.
This force-restart applies to the ROG Phone 3 and Zenfone 7 and later group, which includes the ROG Phone 9, so it is the correct sequence for your handset.
Forget the device and pair it fresh
When one specific accessory keeps failing, a corrupted pairing profile is often to blame, and the cleanest fix is to remove it and start over. First forget the problem device, then add it back as if it were brand new.
- 1.Go to Setting > Connected devices, tap the gear icon next to the device you want to unpair, then tap Forget > Forget device.
- 2.Go to Setting > Connected devices > Pair new device and tap the device to pair it again.
- 3.If prompted, enter the password for the device to complete pairing.
Re-pairing rebuilds the connection from scratch and often resolves accessories that connect but immediately drop.
Test a second Bluetooth device to isolate the fault
Before you dig into updates or resets, find out whether the problem is the phone or the accessory. A fast way to do that is to pair the phone with a different Bluetooth device and see how it behaves. If a different set of earbuds or speaker connects and works perfectly, the original accessory is the problem and the steps above should focus on it. If every device struggles, the issue is on the phone side and the remaining fixes are where to look.
Install the latest system update
Updating the phone system software is a documented fix for Bluetooth issues, since system updates frequently include connectivity and driver corrections. On the ROG Phone 9, go to Settings > System > System updates > Check now and install any available update. ASUS also documents this path as Settings > System > System update > Check Update, so either wording leads to the same place. Keep the phone charged and on Wi-Fi while it downloads and installs, then test Bluetooth again once it reboots.
Boot into Safe Mode to rule out an app
A misbehaving third-party app can interfere with Bluetooth, and Safe Mode temporarily loads the phone with only its built-in software so you can test that theory. To enter Safe Mode on the ROG Phone 9, follow the ASUS sequence below.
- 1.Long press the Power key.
- 2.Tap and hold Power Off.
- 3.Tap OK.
Once in Safe Mode, try your Bluetooth connection again. If it works in Safe Mode but fails normally, a third-party app is the likely cause and should be removed. Restart the phone to exit Safe Mode, then uninstall recently added apps until the problem disappears.
Back up your data, then factory reset
If nothing above works, a factory reset is the last on-device step, and ASUS recommends backing up your data first because the reset wipes everything. This is a destructive action, so treat it carefully, as all data, apps, settings, and personal information will be deleted from the device. Only proceed once you have a full backup you can restore from.
- 1.Back up your data first.
- 2.Go to Settings > System > Reset options > Erase all data (factory reset).
- 3.Tap Erase all data, then confirm.
After the reset completes and you set the phone back up, pair your Bluetooth device again from scratch to see whether the clean slate resolved it.
Reach out to ASUS Product Support
If the Bluetooth issue is still not resolved after working through every step above, the problem may need a closer look than on-device troubleshooting can give. ASUS directs users to contact ASUS Product Support for further assistance in that situation. Have your model and a clear description of what fails ready, for example whether it affects one accessory or all of them, since you already gathered that detail by testing a second device.
Frequently Asked Questions
Does the ASUS ROG Phone 9 actually support Bluetooth?
Yes. The ROG Phone 9 includes Bluetooth 5.4 with HFP, A2DP, AVRCP, HID, PAN, and OPP profiles, and it supports Qualcomm aptX Adaptive and aptX Lossless. Standard Bluetooth troubleshooting such as toggling, re-pairing, updating, and resetting all apply to this model.
Do I need Armoury Crate or another app to fix Bluetooth?
No. Bluetooth on the ROG Phone 9 is managed entirely on the device under Setting > Connected devices. The Armoury Crate software is for gaming and performance, not Bluetooth pairing, so it is not part of these fixes.
How do I force restart the ROG Phone 9 if it freezes?
Press and hold volume down and power simultaneously for at least 8 seconds. If it does not restart after 8 seconds, hold both buttons for 12 seconds. This sequence applies to the ROG Phone 3 and Zenfone 7 and later group, which includes the ROG Phone 9.
Will a factory reset delete my data?
Yes. A factory reset erases all data, apps, settings, and personal information from the device. Back up everything first, then go to Settings > System > Reset options > Erase all data (factory reset), tap Erase all data, and confirm. Use it only as a last resort after the other fixes fail.
Why does my Bluetooth keep cutting out even when it connects?
Interference and distance are common causes. Being near microwaves, cordless phones, or other wireless and electronic products, or being in crowded areas, can disrupt the signal. Reduce the distance between the phone and the accessory and remove obstacles such as metal that sit between them.
