Cheap SIM Cards UKFrom just £5/month — 5G included, no contracts
Silux Mobile is a leading SIM only provider and mobile network provider on the powerful Three network — the cheap mobile provider for the UK. Data SIMs, calls & text SIMs, multi-SIMs and free SIM cards — all with no hidden fees.
5G Included
Fastest network speeds
No Contract
30-day rolling plans
Go Roam
71+ countries included
Keep Your Number
Free PAC transfer
The Silux Mobile Promise
No price increases
Your price is locked — no price rises during your contract, ever
Free upgrades
Upgrade your plan or SIM for free, any time
No credit checks
No credit checks on our SIM contracts
No hidden fees
No hidden fees, no price increases
Our Cheapest SIM Card Deals
All SIMs run on Three's 5G network — pick the plan that suits you.
Data Only SIM
From £5/mo
- No calls/texts included
- Perfect for tablets & MiFi
- 5G included
- No contract
Calls, Text & Data SIM
From £8/mo
- Unlimited UK calls
- Unlimited UK texts
- 5G included
- 30-day rolling
Multi-SIM Deal
From £10/mo
- Multiple SIMs, one bill
- 3 or 4 networks
- Great for families
- Bulk discounts
Free SIM Card
FREE
- No upfront cost
- Delivered free
- Choose plan on activation
- No obligation
Why Silux Mobile Beats the Competition
We compared the biggest UK SIM providers — here's why Silux Mobile offers better value than Lebara, Giffgaff, SMARTY and iD Mobile.
| Feature | Silux Mobile | Lebara | Giffgaff | SMARTY |
|---|---|---|---|---|
| 5G Included | ✅ | ❌ | ✅ | ✅ |
| No Contract | ✅ | ✅ | ✅ | ✅ |
| No Price Rises* | ✅ | ✅ | ✅ | ✅ |
| Free Upgrades | ✅ | — | — | — |
| No Credit Check | ✅ | ✅ | ✅ | ✅ |
| Free SIM Card | ✅ | ✅ | ✅ | ✅ |
| Multi-SIM Plans | ✅ | ❌ | ❌ | ❌ |
| Data-Only SIM | ✅ | ❌ | ❌ | ✅ |
| Go Roam (71+ countries) | ✅ | ❌ | ❌ | ❌ |
| Long-Life SIM | ✅ | ❌ | ❌ | ❌ |
| VoIP Services | ✅ | ❌ | ❌ | ❌ |
| UK-based support | ✅ | ❌ | ✅ | ❌ |
| Broadband Bundles | ✅ | ❌ | ❌ | ❌ |
*No price rises: Silux Mobile and SMARTY never raise your price; Lebara and giffgaff guarantee no price rises during your minimum term. Comparison based on publicly available plan information and is for guidance only.
No Price Rises. Free Upgrades. No Credit Checks.
The big networks now add fixed yearly price rises to your bill mid-contract — Ofcom's 2025 rules made them spell the increases out in pounds and pence, but they're still going up. Silux Mobile is different: the price you join on is the price you keep.
No price increases
Your monthly price is locked for as long as you stay on your plan. No annual rises, no mid-contract price increases — unlike EE, O2, Three and Vodafone, who add fixed yearly increases (Vodafone, for example, is adding £3.50/month from April 2026).
Free upgrades
Move to a bigger data plan or a better SIM whenever you like, free of charge. No upgrade fees and no admin fees — and the same applies to our free broadband upgrades.
No credit checks
There are no credit checks on our SIM contracts, so you can join regardless of your credit history. Most big-network pay monthly plans run a hard credit check — we don't.
Cheap SIM Cards Available Across the UK
Order online and get your cheap SIM card delivered free by Royal Mail Tracked 48 (2–3 working days) anywhere in the UK — or choose faster delivery at checkout.
All orders dispatched within 1 working day via Royal Mail. Free delivery on all SIM cards.