This is for you if… you are not sure when your phone is using Wi-Fi, when it is using mobile data, or why this matters for bills and speed.
I was helping someone in Huntingdon who thought they were always on Wi-Fi at home, but their phone had quietly switched to mobile data because the router password had changed.
Wi-Fi in plain English
Wi-Fi is usually your home, work or café internet connection. Your phone connects to a router nearby. At home, Wi-Fi normally uses your broadband rather than your mobile allowance.
Mobile data in plain English
Mobile data comes from your phone network, such as EE, O2, Vodafone or Three. It lets you use the internet when you are away from Wi-Fi, but it may count against your monthly data allowance.
How to tell which one you are using
- Wi-Fi usually shows a fan-shaped symbol.
- Mobile data may show 4G, 5G, LTE or similar.
- If Wi-Fi is weak, your phone may switch to mobile data.
- Some apps can use lots of mobile data for video or updates.
- You can turn mobile data off temporarily if needed.
Which should you use?
At home, Wi-Fi is usually best. When out and about, mobile data is useful. Avoid entering sensitive details on unknown public Wi-Fi unless you are confident the network is genuine.
Need help?
For ongoing help and peace of mind across Hertfordshire, Bedfordshire, Cambridgeshire and Suffolk, see my membership. For one-off help understanding phone settings, you can book a visit.