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):

1. Open Settings.
2. Tap Mobile Service > Mobile Data Options > Voice & Data.
3. Select VoLTE On.

Wi-Fi Calling:

1. Open Settings.
2. Tap Phone > Wi-Fi Calling.
3. Toggle on Wi-Fi Calling on This iPhone.

Android

4G Calling (VoLTE):

1. Open Settings.
2. Tap Connections or Network & Internet.
3. Tap Mobile Networks.
4. 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:

1. Open the Phone app.
2. Tap the three-dot menu (or “More”).
3. Select Settings > Wi-Fi Calling.
4. 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.