Check your real usage first
- Look at the last 3 months in your network's app — one quiet month doesn't tell the story.
- Note your highest month, not the average: you want a plan that covers your peaks.
- Check how much of that was on Wi-Fi already — your phone splits mobile vs Wi-Fi data.
- If you've never hit your cap, you're almost certainly overpaying for allowance.
Rough guide to allowances
- Light use (messaging, maps, some browsing): 3–8GB is usually enough.
- Medium use (social media, music streaming, some video): 10–25GB covers most people.
- Heavy use (daily video, tethering, no home Wi-Fi): 50GB+ or unlimited starts to make sense.
- Remember: dropping from unlimited to 25GB can halve your monthly bill.
Match the plan to the usage
Once you know your number, the saving is straightforward: buy the smallest plan that covers your peak month. And when your contract ends, don't let it roll over at the old price — add it to UK Bill Tracker (free) and get reminded in time to switch to a cheaper deal.
Track your mobile bill freeFrequently asked questions
How do I check my mobile data usage?
iPhone: Settings → Mobile Data. Android: Settings → Network & Internet → Data usage. Or check your network's app.
Is unlimited data worth it?
Usually not — most people use far less than they think. Check 3 months of real usage first.