How much data does Voice calls (WhatsApp / FaceTime) use?
About 38MB an hour at voice only.
Essentially free. Voice calling over data is one of the great bargains of modern travel.
Put that on a real trip: 60 minutes a day for 10 days at voice only works out at about 0.4GB , before anything else on your phone, and before the 120MB a day that background sync quietly takes.
Voice calls (WhatsApp / FaceTime) data usage by quality
| Quality | Data | 1GB lasts | Source |
|---|---|---|---|
| Voice only | 38MB/hr | 1 days | measured |
Published means the service states the figure itself. Bitrate means it's arithmetic from a documented stream rate. Measured means it's corroborated across independent tests. Real usage moves with signal strength and how aggressively the app pre-buffers.
How that compares
Lighter than Voice calls (WhatsApp / FaceTime)
- Messaging & email10MB/hr
- Google Maps7MB/hr
Heavier than Voice calls (WhatsApp / FaceTime)
- Spotify43MB/hr
- Podcasts60MB/hr
- Web browsing70MB/hr