com.apple.mobilephone Error 1034

It is common with newer iOS versions like iOS 17 or 18 and often relates to carrier voicemail provisioning or a software glitch.

How to Fix Error 1034

Restart Your iPhone
- Press volume up, volume down, then hold the side button until the Apple logo appears to reboot and clear temporary bugs.
Reset Network Settings
- Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.
- This clears Wi-Fi and cellular data caches that might interfere with voicemail setup.
Toggle Cellular Data Off and On
- Turn off cellular data in Settings > Cellular, reboot the phone, then re-enable cellular data.
Hold Down the 1 Key in Phone App
- Open the Phone app, go to the keypad, and hold down the 1 key to dial your voicemail directly. From there you can try to change greetings or settings.
Check Carrier Settings Update
- Go to Settings > General > About; if a carrier settings update is available, you will see a prompt to update.
Turn Off Live Voicemail (if available)
- Go to Settings > Phone > Live Voicemail and toggle it off. This feature is limited to certain regions and might cause conflicts.
Disable iCloud Voicemail Sync
- Go to Settings > [Your Name] > iCloud > Manage Apps, then disable Phone & FaceTime if voicemail syncing causes issues.
Contact Your Carrier
- Voicemail services depend on your cellular carrier. Contact them to verify your voicemail plan and troubleshoot carrier-end problems.

Error 1034 often results in voicemail greetings not saving and callers hearing “voicemail not set up”.
The problem usually arises after iOS updates or changes in carrier provisioning.
If these steps don’t help, contacting Apple Support or your carrier is recommended.

These steps have helped many users resolve voicemail customization and syncing issues associated with error 1034 on iPhone