Network vs network
SMARTY vs VOXI
Different masts, different deals. We compare price rises in pounds, roaming, credit checks and today’s cheapest SIMs on both.
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Do they use the same masts?
No. SMARTY uses Three’s masts and VOXI uses Vodafone’s masts. Check coverage at home and work for both.
Which one raises prices?
SMARTY: No annual rise. VOXI: No annual rise.
Which is better abroad?
SMARTY: EU included, 12GB. VOXI: Passes from £2.60 a day.
SMARTY£144
VOXI£240Cheapest SIM with 10GB or more × 24, plus April rises
Live prices; rises estimated for a plan starting this month.
Over 24 months, the cheapest 10GB+ SIM costs £144 on SMARTY and £240 on VOXI once April rises are added — SMARTY is £96 cheaper. SMARTY runs on Three’s masts; VOXI on Vodafone’s masts.
Prices checked 28 October 2026 · facts checked monthly · How we compare
SMARTY vs VOXI, side by side
| SMARTY | VOXI | |
|---|---|---|
| Masts | Three | Vodafone |
| Annual price rise | No annual rise | No annual rise |
| Roaming | EU included, 12GB | Passes from £2.60 a day |
| Credit check | None | None |
| eSIM | Yes | Yes |
| Wi-Fi Calling | Yes | Yes |
| Cheapest SIM, 10GB+ | £6 a month | £10 a month |
| Cheapest SIM, 30GB+ | £7 a month | £10 a month |
| Cheapest SIM, Unlimited | £17 a month | £35 a month |
Highlighted = better on that line. Facts from network terms and Ofcom; prices live.
Our verdict
On price, SMARTY comes out ahead for a typical 10GB+ SIM: £96 less over two years once April rises are counted.
Coverage differs: SMARTY uses Three’s masts and VOXI uses Vodafone’s masts. Check both on the mast owner’s postcode checker for home and work before you decide.
Pick SMARTY if…
- You want the lower 24-month cost for a 10GB+ SIM
- You travel and want roaming included
- Three signal is strongest where you live
SMARTY and VOXI SIM only deals, live
FAQ
SMARTY vs VOXI questions
Is SMARTY or VOXI cheaper?
SMARTY, today: the cheapest 10GB+ SIM costs £6 a month, and over 24 months with April rises the gap is £96.
Do SMARTY and VOXI use the same network?
No. SMARTY uses Three’s masts and VOXI uses Vodafone’s masts.
Which has better roaming?
SMARTY: EU included, 12GB. VOXI: Passes from £2.60 a day.
Can I switch from SMARTY to VOXI and keep my number?
Yes. Text PAC to 65075 from your SMARTY phone, give the code to VOXI, and the number moves within one working day.