Hi there! I understand you're having trouble updating Subway Surfers on your iPhone running iOS 18.7. Let's get this sorted out together.

Could you tell me a bit more about what happens when you try to update? For example, do you see an error message, or does it just say "Open" instead of "Update" in the App Store?

Meanwhile, here are some simple steps we can try:

1. Check App Store Updates Tab: Open the App Store, tap your profile icon at the top right, then scroll down to see available updates. If Subway Surfers shows “Update,” tap it.

2. Restart Your iPhone: Sometimes a quick restart clears minor glitches. Hold the power button and slide to power off, then turn it back on.

3. Check Your Internet Connection: Make sure you have a stable Wi-Fi or cellular data connection.

4. Free Up Storage Space: If your iPhone storage is full or nearly full, updates may fail. Go to Settings > General > iPhone Storage to check.

5. Sign Out and Back In to the App Store: Go to Settings > [your name] > Media & Purchases > Sign Out. Then sign back in and try updating again.

6. Delete and Reinstall the App: If possible, back up your game progress (if linked to an account), then delete Subway Surfers and reinstall it from the App Store.

Also, sometimes there can be delays with new updates becoming available after a season ends, so it might just need a little time before the latest version appears for you1.

Let me know what you've tried so far or if you need help with any of these steps!