Cheap SIM Cards in London
The cheapest SIM cards in London — from £5/month on Three's 5G network. Free Royal Mail Tracked 48 delivery to Greater London. 30-day rolling or 3 to 24-month contracts, no credit check required.
Silux Mobile is a SIM only provider and mobile network provider in London, with SIM cards available UK-wide including London and all of Greater London. SIMs are available on Three, Vodafone, EE and O2 — the same masts and signal as the networks themselves, at a fraction of the price. Choose your plan and it'll arrive at your London address by free Royal Mail Tracked 48 delivery (2–3 working days), or choose faster delivery at checkout.
Why London Customers Choose Silux Mobile
Delivered to London
Free Royal Mail Tracked 48 delivery (2–3 working days) anywhere in the UK including London and Greater London.
Three 5G in London
Our SIMs use Three's 5G/4G network with strong coverage across London and surrounding areas.
From £5/Month
Cheaper than Lebara, Giffgaff and SMARTY — with 5G included. Roaming is an extra cost and varies by package.
Flexible Plans
SIM cards on 30-day rolling plans or 3 to 24-month contracts, and broadband from 1 month.
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
SIM Plans — Delivered to London
All on Three's 5G network. 30-day rolling plans or 3 to 24-month contracts.
Calls + Data
Unlimited calls
£8/mo
- 30GB data
- Unlimited calls & texts
- 4G/5G
- 30-day or contract
Unlimited
Unlimited
£18/mo
- Unlimited data
- Unlimited calls & texts
- 5G
- Roaming extra — varies by package
Three 5G Coverage in London
Three's 5G and 4G network covers London and Greater London with strong indoor and outdoor signal. With over 99% UK population coverage, you'll have reliable connectivity whether you're in the city centre or the surrounding areas.
Check Your London PostcodeSIM Cards in London — FAQs
What is the cheapest SIM card in London?
Silux Mobile offers the cheapest SIM cards available in London — data SIMs from £5/month on Three, Vodafone, EE and O2, on a 30-day rolling plan or a 3 to 24-month contract, with free Royal Mail Tracked 48 delivery to Greater London.
Does Three have good coverage in London?
Yes. Three's 4G and 5G network covers London and the surrounding Greater London area with strong indoor and outdoor signal. You can check your exact postcode at siluxmobile.co.uk/network-coverage.
Can I get a SIM card delivered to London?
Yes. Silux Mobile delivers SIM cards to all London addresses free by Royal Mail Tracked 48 (2–3 working days). Faster delivery can be chosen at checkout.
Do Silux Mobile SIM cards work in London?
Yes. Silux Mobile SIMs are available on Three, Vodafone, EE and O2, so you can choose the network with the best coverage across London, Greater London and all of England.
Will my SIM price increase during my contract?
No. Silux Mobile never raises your price mid-contract — there are no price increases during your contract and no annual or inflation-linked price rises. The price you sign up at in London is the price you keep.
Are SIM plan upgrades free with Silux Mobile?
Yes. Upgrades are free — move to a bigger data plan or a better SIM whenever you like at no extra cost, with no upgrade or admin fees.
Do you run a credit check for SIM cards in London?
No. There are no credit checks on our SIM contracts, so anyone in London can join Silux Mobile regardless of credit history. No credit check is required to order or activate your SIM.
Who is the best SIM only provider in London?
Silux Mobile is a top SIM only and mobile provider in London, with SIMs on Three, Vodafone, EE and O2 — cheap SIM deals on 30-day rolling plans or 3 to 24-month contracts, no credit checks and no price rises.
Are Silux Mobile SIM prices in London inclusive of VAT?
Yes. There are no hidden fees — every Silux Mobile SIM price shown to customers in London is the price you pay, incl. VAT. No setup fees, no surprise mid-contract increases.