When your ASUS ROG Phone 9 stops ringing for incoming calls, it can feel like you're suddenly cut off. This is a common hiccup that can stem from anything from a simple setting to a network hiccup. The good news is you can usually fix it yourself without too much trouble.
Before we get into the deeper fixes, let's knock out the quick checks. First, pull down the notification shade and make sure Airplane Mode isn't accidentally on. A simple restart is always a good idea too, just hold the power button and tap restart. If you're in a game, check that X Sense mode isn't set to block all notifications. Finally, take a quick look at your signal bars in the corner, as poor reception is a classic culprit.
Check Your Do Not Disturb and Gaming Modes
The ROG Phone 9 has several layers of notification control that can silence calls. Start by swiping down twice to open the full Quick Settings panel and look for the Do Not Disturb icon. If it's highlighted, tap it to turn it off.
Next, open the Armoury Crate app. This is your command center for gaming profiles. Check your active X Sense profile, as some are configured to mute calls and alerts for an immersive experience. You can adjust these settings or simply switch to a different profile like "Dynamic" to see if calls come through.
Review Call Blocking and Spam Settings
Your phone or carrier might be automatically filtering calls it thinks are spam. Open your Phone app, tap the three-dot menu in the top right, and go to Settings > Caller ID and spam.
Look for options like "Filter spam calls" or "See caller and spam ID." Try toggling these off temporarily to test. Also, tap on "Blocked numbers" to make sure no important contacts have accidentally been added to the list.
Inspect Your SIM Card and Network
A loose or faulty SIM card can definitely cause call issues. The ROG Phone 9 uses a dual nano-SIM tray, usually on the bottom edge. Grab the included SIM eject tool, pop out the tray, and carefully remove the SIM card.
Give the gold contacts a gentle wipe with a soft, dry cloth and then reseat the card firmly in the tray. While you're checking hardware, I'd also make sure the side-mounted USB-C port is clear of any lint, as a completely blocked port can sometimes cause system weirdness.
Reset Your Network Settings
If you're seeing inconsistent signal or calls dropping, resetting your network connections can clear up glitches. Go to Settings > System > Reset options. Tap on "Reset Wi-Fi, mobile & Bluetooth."
This will erase all saved Wi-Fi networks, Bluetooth pairings, and mobile network preferences, so you'll need to reconnect to your Wi-Fi afterwards. It won't delete your personal files or apps, but it's a solid refresh for your phone's radios.
Check for Call Forwarding and Barring
Call forwarding could be silently sending your calls elsewhere. In your Phone app, tap the three-dot menu, go to Settings, and look for "Call forwarding" or "Supplementary services." Make sure all forwarding options are set to "Never forward" or are turned off.
Also, look for a setting called "Call barring" or "Fixed dialing numbers." Ensure no restrictions are active that would block incoming calls. These settings can sometimes get changed during international travel or by carrier updates.
Update Your Software and Carrier Services
Running outdated software can lead to all sorts of bugs, including call problems. Head to Settings > System > System update to check for any available Android or security patches. The ROG Phone 9 on Android 15 should receive regular updates.
Also, open the Google Play Store, tap your profile icon, and go to "Manage apps & device." Under the "Updates available" section, look for updates to "Carrier Services" and your phone app. Keeping these updated ensures compatibility with your network.
Clear the Phone App's Cache and Data
Corrupted temporary files in the Phone app itself can cause it to misbehave. Go to Settings > Apps > See all apps. Find and tap on "Phone" in the list. Select Storage & cache.
Tap "Clear cache" first. This is safe and won't delete your call history. If the problem persists, you can try "Clear storage" or "Clear data." This will reset the app to its default state, so you may lose your call log and need to re-set any preferences.
Test with a Different Network Mode
Sometimes forcing the phone to use a different type of network can bypass an issue. Go to Settings > Network & internet > SIMs. Tap on your active SIM and then on "Preferred network type."
If it's set to "5G," try switching it to "4G/3G/2G (auto connect)" for a while. 5G coverage can still be spotty, and this can rule out a network handoff problem. You can always switch it back later.
Disable Battery-Saving Features for the Phone App
Android's aggressive battery optimization can sometimes stop apps from running in the background, which the Phone app needs to do. Go to Settings > Apps > See all apps and select "Phone." Tap on "Battery."
Set the battery mode to "Unrestricted." This tells the system not to restrict the Phone app's background activity, ensuring it can always receive calls. It's a good idea to do this for your messaging app as well.
Perform a Factory Reset (Last Resort)
If you've tried everything and calls still won't come through, a factory reset is the final step. This will erase everything on your phone, so you must back up your photos, files, and app data first. Use Google's backup or the ASUS backup tool in Settings.
Once backed up, go to Settings > System > Reset options > Erase all data (factory reset). Follow the prompts. After the phone reboots, set it up as new initially to test if the call issue is resolved before restoring your backup.
