Since One UI 8.5 rollout, Samsung Galaxy forums are filling with the same post: “Since the update, callers are unable to leave me voicemails.”
Samsung users report similar issues after the One UI update and June Android 16 patches; Visual Voicemail shows syncing forever or disappears completely.
SUMMARY
If voicemail stopped working on your Samsung after a One UI update, the most likely cause is that the update changed your Phone app settings, permissions, or visual voicemail connection. Start by checking the visual voicemail tab in the Phone app, then fix app cache, permissions, call forwarding, and mobile network settings in that order.
Your voicemails are not deleted. The update revoked your carrier provisioning and reset background data permissions.
This guide covers eight proven fixes for Samsung voicemail issues after One UI updates, with specific solutions for different carriers, and One UI versions.
Why it happens and how to restore voicemail in under 3 minutes, tested June 2026 on Galaxy S24, and S25. For other Android phones, head to Voicemail Not Working After Android Update guide for Android 15 and later update errors.
Quick Fix
Before you try anything complicated, do these three things first. Most voicemail issues after One UI updates are resolved by a simple restart or network refresh.
- Restart Your Galaxy Phone:
- Press and hold the Side key and Volume Down button
- Tap Restart (if you don’t see it, power off completely, wait 30 seconds, then power back on)
- Toggle Airplane Mode:
- Swipe down twice to open Quick Settings.
- Tap the Airplane mode icon to turn it on.
- Wait 10 seconds.
- Tap it again to turn it off.
- Test Your Voicemail: Open the Phone app and press and hold the 1 key.
- If you reach your voicemail box: The problem is likely with Visual Voicemail or notifications, not the voicemail service itself.
- If you get an error or the call fails: The problem is likely carrier-side or with your voicemail settings.
Why does voicemail stop working after Samsung UI update?
Understanding why your voicemail broke helps you fix it faster. On Samsung devices, several things can happen after a One UI update:
- The Phone app updates: Samsung’s Phone app is separate from One UI. When the Phone app updates, the connection to your carrier’s voicemail service can break.
- Carrier settings change: One UI updates can reset how your phone communicates with your carrier, affecting voicemail provisioning.
- SIM configuration changes: Some users reported that One UI 7 updates affected dual SIM functionality, breaking voicemail on one or both lines.
- Auto Blocker interference: One user discovered that the Auto Blocker feature, enabled by default in One UI, was blocking 2G service required for voicemail.
Android OS/Samsung UI updates enforce a security check that only the active Phone app can authenticate, and if mobile data is blocked or carrier provisioning is erased during the update, new voicemails won’t download.
There are three other changes:
1. Security check: AOSP code changed to throw SecurityException “Caller not currently active visual voicemail package”. If the update changed your default Phone app, authentication fails.
2. Data permission reset: Unrestricted data is turned off after update. Visual Voicemail needs mobile data for initial authentication – T-Mobile officially tells users to “Turn off Wi-Fi to ensure you’re using the T-Mobile network”.
3. Samsung Direct Voicemail conflict: One UI 8.5 introduced Direct Voicemail, which uses on-device AI instead of carrier voicemail. When enabled, it can disable the carrier’s Visual Voicemail.
Samsung’s current reply to the bug is “You will need to contact your carrier and have them reprovision your voicemail.”
Quick Diagnosis #1: Is It Your Carrier or Your Samsung Phone?
Knowing this helps you diagnose faster and avoid wasting time on fixes that will not work.
- Test basic voicemail: Press and hold 1 in the Phone app keypad. If it calls voicemail and you hear messages, your carrier service is working—the problem is with Visual Voicemail or notifications. If it says “voicemail not set up” or “call cannot be completed,” it is a carrier issue.
- Check other Samsung phones on the same carrier. If family members on the same carrier have issues, it is likely carrier-wide.
- Check single vs dual SIM: If you have dual SIM and voicemail works with one SIM disabled, the issue is SIM-related.
Once you know which type of problem you have, pick the relevant fix below.
Quick Diagnosis #2: Which Voicemail Type Is Broken? Standard or Visual?
The fix is different depending on whether you’re using standard voicemail or Visual Voicemail. Here’s how to tell them apart.
How to Test
- Press and hold 1 in your Phone app.
- If you can hear your old messages and the system works, your standard voicemail is working → The problem is likely with Visual Voicemail or notifications.
- If you cannot access your voicemail at all, standard voicemail is broken → The problem is likely carrier-side or with your voicemail settings.
If standard voicemail is broken, skip to (Carrier Issues fixes). If standard voicemail works but Visual Voicemail doesn’t, continue below.
Fix #1: Check Your Carrier Voicemail Service
Because voicemail is a carrier service, you need to confirm your carrier has not changed anything on their end.
What to check with your carrier:
- Confirm Visual Voicemail is provisioned on your account.
- Ask them to reset your voicemail service on their end.
- If you recently changed plans, confirm Visual Voicemail is still included.
- If using eSIM or new SIM, confirm voicemail provisioning is complete (can take several hours).
Carrier-specific notes:
- Verizon: Often restricts Visual Voicemail to certain plans.
- AT&T: May require their own Visual Voicemail app rather than Samsung’s.
- T-Mobile: Generally works well with Samsung’s Phone app.
- MVNOs (Spectrum, US Mobile, Visible): May have limited Visual Voicemail support.
Fix #2: The Auto Blocker 2G Issue (One UI 7)
A Samsung user discovered that One UI 7’s Auto Blocker feature, enabled by default, was blocking 2G service, which is required for voicemail on some carriers.
Symptoms: Calls go straight to voicemail without the phone ringing. You receive missed call notifications but your phone never rings.
How to fix:
- Open Settings on your Samsung phone.
- Go to Security and privacy.
- Find Auto Blocker.
- Allow 2G service (the exact setting may vary by One UI version).
This fix resolved voicemail and calling issues for users after the One UI 7 and later update.
Fix #3: One UI 8.5 Direct Voicemail Feature
Samsung introduced Direct Voicemail in One UI 8.5, which lets Galaxy AI transcribe voicemail messages in real-time without going through your carrier’s voicemail system.
Direct Voicemail conflicts with carrier Visual Voicemail on One UI 8.5. Turn it off if you want carrier voicemail back.
- Open Phone app > tap 3 dots > Settings.
- Tap Direct Voicemail > toggle off.
- Go back to Settings > Voicemail > ensure Visual Voicemail toggle is On.
- Turn off Wi-Fi.
- Open Voicemail tab > pull down to refresh.
Additional options:
- Auto send to voicemail: Automatically route calls to voicemail after a set ringing duration (1-20 seconds)
- Transcript assist: Get real-time transcriptions of messages
If your carrier voicemail is not working, Direct Voicemail is a powerful workaround.
- What Direct Voicemail does: When you reject a call, the caller can leave a message that Galaxy AI transcribes live. You can even answer during the recording. This bypasses carrier voicemail entirely.
- Important: Direct Voicemail is only available on Galaxy phones running Android 16 with One UI 8.5 or higher. It will roll out first on Galaxy S26 devices.
Fix #4: Dual SIM Voicemail Issues
Samsung users with dual SIM devices have reported specific voicemail issues after One UI updates.
Common problem: Visual Voicemail works with one SIM active but crashes when both are enabled.
Reported case: An unlocked S25 Ultra user found that disabling the second eSIM in SIM Manager allowed Visual Voicemail to work. Enabling both eSIMs caused the voicemail app to crash immediately.
How to test:
- Go to Settings > Connections > SIM Manager.
- Disable one SIM.
- Test voicemail.
- If it works, the issue is related to dual SIM configuration.
Solutions:
- Report the issue to Samsung via Samsung Members app.
- Try swapping SIMs to different slots.
- Contact your carrier to ensure both lines have voicemail properly provisioned.
Follow the guide Android Voicemail Missing After SIM Change if the voicemail disappears or stops working after a SIM change.
Why do callers hear mailbox not set up after update?
This happens because the One UI update has disrupted the link between your Samsung phone and your carrier’s voicemail system.
The message “mailbox not set up” is your carrier’s system telling you it can’t connect to an active voicemail box for your number. Read How to setup voicemail on Android for a voicemail setup guide.
Fix #5: Turn off Wi-Fi and allow unrestricted mobile data
This fixes 70 percent of post-update voicemail error cases.
Turn off Wi-Fi, then allow the Phone app to use unrestricted mobile data, and refresh Visual Voicemail on LTE or 5G. Visual Voicemail cannot authenticate on Wi-Fi only.
- Go to Settings on your Samsung Android phone.
- Go to Connections.
- Tap on Data usage.
- Select Mobile data only apps.
- Enable Phone and Visual Voicemail services.
- Open Phone > Voicemail > pull to refresh > wait 60 seconds.
- You can turn Wi-Fi back on after messages download.
Why this works: Carriers authenticate via hidden SMS over cellular. After an update, the system reverts to Wi-Fi preferred, which blocks that handshake.
For visual voicemails, here are the ways to fix Visual Voicemail Not Working on Wifi.
Fix #6: Re-enable and reprovision visual voicemail
Many voicemail issues after One UI updates are actually carrier-side problems. Your carrier may need to reset or “reprovision” voicemail on your line.
Reprovisioning forces your carrier to resend Visual Voicemail credentials to your SIM.
How to Identify a Carrier-Side Problem
- Press and hold 1 to dial voicemail → Error or failed call.
- You recently switched SIM to eSIM.
- You changed plans or ported your number.
- Multiple people on the same carrier report the same issue.
- You just switched SIM cards or carriers.
What to Say When You Call
When you contact carrier support, use these specific phrases:
“My voicemail stopped working after the One UI update. I’ve restarted my phone and cleared the Phone app cache. Can you check if voicemail is properly provisioned on my line?”
For persistent issues, request this:
“Please completely de-provision (remove) the Visual Voicemail feature from my phone line, wait 60 seconds, and then re-provision it explicitly for a Samsung 5G device network profile.”
Be prepared to provide:
- Your Galaxy model (e.g., Galaxy S24 Ultra)
- Your One UI version (Settings > About phone > Software information)
- Your Phone app version (Settings > Apps > Phone)
Carrier-specific methods:
- T-Mobile (including Mint, Metro): Turn off Wi-Fi, ensure you have latest Visual Voicemail app from Play Store, open app on mobile data. If still fails, text ACTIVATE to 44744 (Videotron method that also works on some T-Mobile MVNOs) then restart.
- AT&T: MyAT&T app > Voicemail > Reset password, or dial 611 and ask to “reprovision visual voicemail”
- Verizon: Dial *86 to access voicemail once via IVR, hang up, then open Visual Voicemail on mobile data.
- Videotron / Fizz Canada: Text “ACTIVATE” to 44744 to force data refresh.
After reprovision, leave yourself a test voicemail from another phone to confirm.
What does “reprovision voicemail” mean?
When you ask your carrier to “reprovision” your voicemail, you’re asking them to reset the digital connection between your phone line and their voicemail system.
Think of it like refreshing a webpage that’s frozen. The carrier’s system refreshes the settings for your phone number on their servers, essentially giving your voicemail a fresh start.
Fix #6: Roll back Phone app update (Android 15 temporary fix)
For Android 15 users, using Google Phone App as the default dialer recently lost functionality; uninstalling phone app updates might be a temporary fix until a permanent solution arrives.
This applies to June 2026 patches where Google’s Phone app introduced stricter authentication .
Use this only if voicemail broke immediately after Phone app updated, not a system update.
- Go to Settings > Apps > Phone > tap 3 dots top right > Uninstall updates.
- Restart.
- Open Phone > Voicemail > check if messages return.
- Update Phone app again after 1-2 days – carrier may have fixed server-side.
Fix #7: Clear cache correctly and reset network
Clearing cache removes corrupted provisioning files without deleting saved voicemails on server.
- Go to Settings > Apps > Show system apps > Phone > Storage > Clear cache (do NOT clear data yet)
- Go to Settings > Apps > Visual Voicemail (if separate app) > Storage > Clear cache.
- If still failing:
- Goto Settings > System > Reset options > Reset Wi-Fi, mobile & Bluetooth. This does not erase apps but you will re-enter Wi-Fi passwords.
If you must clear data:
Settings > Apps > Phone > Storage > Clear data will delete downloaded voicemails locally, but they remain on carrier server and will redownload on the next sync. Transcripts you saved locally will be lost.
Fix #8: Reset Network Settings
If nothing else works, resetting network settings can fix voicemail issues caused by bad APN, mobile network, or SIM registration data.
- Go to Settings > General management on your Samsung.
- Tap Reset.
- Tap Reset network settings.
- Confirm and reset.
Important: This resets Wi-Fi networks, Bluetooth connections, and mobile network settings. You will need to reconnect to Wi-Fi and Bluetooth devices after.
What if callers can’t leave voicemail after One UI 8.5?
This is different from not seeing messages. It means call forwarding to voicemail was erased.
- Dial ##002# > Call to remove all forwarding, then re-enable voicemail forwarding:
- Dial *61[your voicemail number]1120# > Call.
Replace 20 with seconds before voicemail (20 = 4 rings).
Find the voicemail number in Phone > Settings > Voicemail.
Read the guide to change the number of rings before sending calls to voicemail to configure the ring duration.
How to prevent voicemail breaking after next update?
- Keep Unrestricted data on for Phone app before updating.
- After any system update, open Visual Voicemail on mobile data first, not Wi-Fi.
- On Samsung, decide: Use Direct Voicemail OR carrier Visual Voicemail, not both toggled on/off repeatedly.
- Keep carrier Visual Voicemail app updated from Play Store.
Other Troubleshoots:
Voicemail Breaking After One UI 8.5 update-FAQ
Will I lose voicemails if I clear data?
Will I lose voicemails if I clear data?
No. Voicemails stay on carrier server for 30 days. Clearing Phone app data only removes local cache. They redownload after Fix 1.
Why does Samsung say contact carrier to reprovision?
Because One UI 8.5 wipes the hidden OMTP configuration that links SIM to voicemail server. Only carrier can push new config.
Does visual voicemail need mobile data every time?
Only for initial authentication and downloading new messages. After download, you can read transcripts on Wi-Fi. AT&T and Freedom Mobile note it does not work on Wi-Fi only.
I switched to Google Voice for voicemail and now get com.android.phone has stopped.
This is a provider conflict. Go to Phone > Settings > Voicemail > Service provider > set back to Your carrier, clear Phone data, restart, then set up Google Voice again properly.
Why did my voicemail stop working after an Android update?
The update probably reset one or more voicemail-related settings or caused the Phone app to glitch. The most common fixes are re-enabling visual voicemail, clearing cache, and checking permissions,
Do I need to reinstall the Phone app?
Usually no, because the built-in Phone app is tied to the system. Try cache clearing, data reset, and updates first unless your device uses a separate carrier voicemail app.
Final words
Updates don’t delete voicemail on your Samsung; they reset the connection to it. Turn off Wi-Fi, allow unrestricted mobile data for the Phone app, and reprovision with your carrier. For One UI 8.5 users, turn off Direct Voicemail if you prefer carrier voicemail. Test with a self-sent voicemail and your inbox will return within a minute.
References: