How do I use Wi-Fi and 4G calling?
What is Wi-Fi and 4G calling?
Wi-Fi and 4G calling lets you make and receive calls over a Wi-Fi or 4G connection, instead of relying only on standard mobile coverage.
- Helpful in areas with weak signal.
- Improves call quality.
- Works with your regular phone dialler, no special app required.
Calls are included in your standard allowance — if you go over your minutes, normal charges apply.
Can I use this service?
Yes, Wi-Fi and 4G calling is available to all plan customers, as long as your phone is compatible.
To check if your phone supports it:
- Visit the manufacturer’s website, or
- Look in your phone’s connectivity settings for Wi-Fi Calling or VoLTE/4G Calling options.
How to set up Wi-Fi and 4G calling
iPhone
4G Calling (VoLTE):
- Open Settings.
- Tap Mobile Service > Mobile Data Options > Voice & Data.
- Select VoLTE On.
Wi-Fi Calling:
- Open Settings.
- Tap Phone > Wi-Fi Calling.
- Toggle on Wi-Fi Calling on This iPhone.
Android
4G Calling (VoLTE):
- Open Settings.
- Tap Connections or Network & Internet.
- Tap Mobile Networks.
- Look for VoLTE calls or 4G Calling and toggle it on.
Examples:
- Pixel: Settings > Network & Internet > SIMs > Enable 4G Calling.
- Other Androids: Check Mobile Network or SIM settings.
Wi-Fi Calling:
- Open the Phone app.
- Tap the three-dot menu (or “More”).
- Select Settings > Wi-Fi Calling.
- Toggle on Wi-Fi Calling.
Some Android phones have this option under Settings > Connections > Wi-Fi Calling.
O2 vs plan network
- O2 network: Requires APN settings to be updated and may take up to 4 days to activate. 4G Calling must be enabled manually.
- plan network: 4G Calling is automatically active on all devices and runs in the background for better call quality.
How to make a Wi-Fi or 4G call
Once enabled in your settings, just place calls as normal:
- Your phone automatically uses Wi-Fi or 4G instead of mobile signal where available.
- No separate app is required.