Data SIM Cards in Harrow
Data-only SIM cards in Harrow from £4/month on Three's 5G network. Ideal for tablets, dongles, MiFi and routers.
Silux Mobile delivers data SIMs to Harrow and all of Greater London by next-day Royal Mail. Pure data, no calls or texts to pay for — on Three's 5G/4G network with no contract.
Why Harrow Chooses Silux Data SIMs
Delivered to Harrow
Free next-day Royal Mail delivery anywhere in the UK including Harrow and Greater London.
Three 5G in Harrow
Our SIMs use Three's 5G/4G network with strong coverage across Harrow 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 Harrow
Data-only SIMs on Three 5G. No contracts.
Three 5G Data Coverage in Harrow
Three's 5G/4G network covers Harrow and Greater London with strong signal for tablets, dongles and mobile routers. Over 99% UK population coverage.
Check Your Harrow PostcodeData SIM Cards in Harrow — FAQs
What is the cheapest data SIM in Harrow?
Silux Mobile offers some of the cheapest data SIMs available in Harrow — from £5/month on Three's 5G network, with no contract and free next-day delivery to Greater London.
Does Three have good coverage in Harrow?
Yes. Three's 4G and 5G network covers Harrow and the surrounding Greater London 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 Harrow?
Yes. Silux Mobile delivers to all Harrow 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 Harrow is the price you keep.
Do you run a credit check in Harrow?
No. There are no credit checks on our SIM contracts, so anyone in Harrow can join regardless of credit history.
Are prices in Harrow inclusive of VAT?
Yes. No hidden fees — every price shown to customers in Harrow is the price you pay, incl. VAT. No setup fees and no exit fees.