Data SIM Cards in Windsor
Data-only SIM cards in Windsor from £4/month on Three's 5G network. Ideal for tablets, dongles, MiFi and routers.
Silux Mobile delivers data SIMs to Windsor and all of Berkshire by next-day Royal Mail. Pure data, no calls or texts to pay for — on Three's 5G/4G network with no contract.
Why Windsor Chooses Silux Data SIMs
Delivered to Windsor
Free next-day Royal Mail delivery anywhere in the UK including Windsor and Berkshire.
Three 5G in Windsor
Our SIMs use Three's 5G/4G network with strong coverage across Windsor and surrounding areas.
From £5/Month
Cheaper than Lebara, Giffgaff and SMARTY — with 5G and Go Roam included at no extra cost.
No Contract
30-day rolling plans. Cancel anytime — no exit fees, no minimum term.
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 setup fees, no exit fees — cancel any time
Data SIM Plans — Delivered to Windsor
Data-only SIMs on Three 5G. No contracts.
Three 5G Data Coverage in Windsor
Three's 5G/4G network covers Windsor and Berkshire with strong signal for tablets, dongles and mobile routers. Over 99% UK population coverage.
Check Your Windsor PostcodeData SIM Cards in Windsor — FAQs
What is the cheapest data SIM in Windsor?
Silux Mobile offers some of the cheapest data SIMs available in Windsor — from £5/month on Three's 5G network, with no contract and free next-day delivery to Berkshire.
Does Three have good coverage in Windsor?
Yes. Three's 4G and 5G network covers Windsor and the surrounding Berkshire area with strong indoor and outdoor signal. Check your exact postcode at siluxmobile.co.uk/network-coverage.
Can I get a data SIM delivered to Windsor?
Yes. Silux Mobile delivers to all Windsor addresses via Royal Mail next-day delivery. Order before 3pm for next-day dispatch.
Will my price increase mid-contract?
No. Silux Mobile never raises your price mid-contract — no annual or inflation-linked rises. The price you sign up at in Windsor is the price you keep.
Do you run a credit check in Windsor?
No. There are no credit checks on our SIM contracts, so anyone in Windsor can join regardless of credit history.
Are prices in Windsor inclusive of VAT?
Yes. No hidden fees — every price shown to customers in Windsor is the price you pay, incl. VAT. No setup fees and no exit fees.