Quick answer: turn on Wi-Fi Calling so calls use your home or office Wi-Fi when mobile signal is weak. All major UK networks support it on most phones.
Turn on Wi-Fi Calling
iPhone
Settings → Apps → Phone → Wi-Fi Calling (on older versions Settings → Phone → Wi-Fi Calling).
Samsung
Open the Phone app → ⋮ → Settings → Wi-Fi calling.
Google Pixel
Settings → Network & internet → Internet → (your network) → Wi-Fi calling, or in the Phone app settings.
When it’s working you’ll see “Wi-Fi” or a Wi-Fi icon next to your network name.
Other fixes
- Turn on 4G/VoLTE calling – in your SIM or mobile settings, make sure 4G calling or VoLTE is on.
- Update the phone and carrier settings.
- Remove the case to test – metal or magnetic cases can block signal.
- Toggle Airplane Mode and restart.
- Reset network settings if it keeps happening (see the Wi-Fi guide).
They can’t hear you, or you can’t hear them?
If the call connects but the sound is the problem, it’s more likely the earpiece or microphone than the signal. See people can’t hear me on calls and speaker quiet or muffled.
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Fix it yourself
Fix it yourself
Fix it yourself