Three coverage, honest SIM-only
Smarty is Three’s value brand. No long extras — data on Three masts.
SIM-only
Smarty mobile deals & plans
Honest data. No sneaky stuff. Powered by Three.
About Smarty
Smarty is Three’s no-nonsense SIM-only brand: fewer frills, clearer rules, and pricing aimed at people who dislike confusing contracts. It is a frequent recommendation when someone wants Three coverage without shopping the full Three handset store.
Because Smarty runs on Three, use Three’s coverage tools to check your postcode. Smarty is SIM-first — if you need a new phone, you may buy the handset unlocked elsewhere or look at Three’s main phone deals.
Stack Smarty against Three SIM-only and iD Mobile when comparing Three-based value.
Network coverage: Three
Typical plan types: SIM-only plans with transparent allowances; data rollover on many tariffs
Also on Three: Smarty uses Three coverage. Also on Three:
Key points
Quick highlights when comparing Smarty phone deals, SIM plans.
The usual compare is Three itself
If you do not need Three’s handset shop, Smarty is often the cleaner SIM.
Also compare iD Mobile and Honest
Same host. Different tone: Currys-backed, ethical, or Smarty’s plain SIM.
Coverage is Three’s map
Use Three’s checker. Smarty does not have a different radio network.
Pros
- Transparent SIM-only positioning
- Three network coverage
- Data rollover on many plans
- Good antidote to complex contract small print
Watch-outs
- Limited as a one-stop phone shop
- No business fleet platform
- Coverage still depends on Three in your area
Consider Smarty if…
Maybe skip if…
Questions about Smarty
Host network, 5G and who it is actually for. Checked September 2026.
Whose masts does Smarty use?
Three. Use Three’s coverage checker.
Is Smarty owned by Three?
Yes — it is Three’s value SIM brand. Different shop, same masts.
Smarty or iD Mobile?
Same host. iD if you buy through Currys; Smarty if you want the plain SIM shop.
Compare other networks
Not sure Smarty is the one? Explore a few alternatives.