Hi! I’m Emily, here to help you with the audio sound issue in MAPS.ME on your iPhone running iOS 18.5.

Just to get a clearer picture:
- Is the sound not working only in MAPS.ME, or do other apps on your phone also have audio issues?
- Are you trying to hear voice navigation instructions or other audio types within the app?
- Have you checked if your iPhone’s volume is turned up and the mute switch (on the side) is off?

Meanwhile, here’s a step-by-step approach we can try to fix the MAPS.ME audio sound issue:

1. Check In-App Voice Navigation Settings
Open MAPS.ME and go to its settings. Look for a section related to voice or navigation instructions and make sure voice guidance is enabled.

2. Verify iPhone Sound Settings
- Ensure the volume buttons on your iPhone are turned up.
- Make sure that the Ring/Silent switch on the left side of your iPhone is not set to silent (orange showing).
- Open Control Center and check that the volume slider is up.

3. Restart the MAPS.ME App
- Close the app fully by swiping it away from the app switcher.
- Reopen the app and check if the sound works during navigation.

4. Restart Your iPhone
Sometimes a quick reboot helps clear any temporary software glitches affecting sound.

5. Reinstall MAPS.ME
If the above doesn't work, try uninstalling and reinstalling the app. This can fix potential corrupted files causing audio failure.

6. Check for iOS and MAPS.ME Updates
Keeping both your iPhone’s iOS and the MAPS.ME app updated ensures you have the latest bug fixes and compatibility improvements.

If you’ve tried some of these steps already or if the problem is quite specific (like voice instructions not audible but music plays fine), please let me know so I can provide more targeted advice!

Are you able to check the voice guidance settings and your iPhone volume controls first?