Live Voicemail is an iOS 17+ feature that lets your iPhone answer unknown calls, record the message, and show real-time transcription so you can decide whether to pick up.
How to enable Live Voicemail (Philippines)
Open Settings
Go to General → Language & Region
Change Region to United States or Canada
Go to Phone settings and enable Live Voicemail (if shown)
Restart your iPhone
Tips
Use Live Voicemail to screen spam and unknown callers.
Keep a short, clear greeting so callers leave useful details.