Hi there! I see you're experiencing GPS signal loss with your Polar Beat app on your iPhone. Let's get this sorted out together. Could you tell me a bit more about when the GPS signal drops? For example, does it happen right when you start your workout, intermittently during your activity, or after a certain amount of time?

Meanwhile, here are some general troubleshooting steps tailored for your iPhone with iOS 18.7:

1. Check Location Permissions for Polar Beat:
Go to Settings > Privacy & Security > Location Services, then scroll to Polar Beat and ensure it's set to "While Using the App" or "Always".

2. Ensure GPS Is Enabled:
Make sure your iPhone’s Location Services are turned on overall and that the app is allowed access.

3. Avoid Interference:
GPS signals can be weak indoors or near tall buildings. Try testing your GPS outdoors in an open area to see if the signal improves.

4. Close Other Apps:
Having many apps open that use GPS can cause conflicts; try closing background apps to improve the signal.

5. Restart Your iPhone:
A simple restart can often refresh GPS connections.

6. Update the Polar Beat App:
Make sure you have the latest version of Polar Beat installed from the App Store.

7. Reset the A-GPS Data:
Though Polar Beat is on iPhone, sometimes the Assisted GPS (A-GPS) data can get outdated. iPhones generally update this automatically, but toggling airplane mode on and off may help refresh it.

If you've already tried these, please let me know which steps you’ve done, and if the problem persists in certain locations or situations. This way, I can guide you through some deeper troubleshooting.

Are you currently using any other Polar devices like the H10 heart rate sensor alongside the app? Sometimes connectivity issues there impact GPS readings too.

Looking forward to your reply!