SIM Only Plans in High Wycombe
SIM only plans in High Wycombe from £5/month on Three's 5G — data-only, unlimited and multi-network options.
Silux Mobile is a SIM only provider serving High Wycombe and all of Buckinghamshire. SIMs are available on Three, Vodafone, EE and O2, on a 30-day rolling plan or a 3 to 24-month contract, with no credit check and free Royal Mail Tracked 48 delivery.
Why High Wycombe Chooses Silux Mobile
Delivered to High Wycombe
Free Royal Mail Tracked 48 delivery (2–3 working days) anywhere in the UK including High Wycombe and Buckinghamshire.
Three 5G in High Wycombe
Our SIMs use Three's 5G/4G network with strong coverage across High Wycombe 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
Every plan starts from 1 month — SIM cards on 30-day rolling plans or 3 to 24-month contracts, and rolling monthly broadband.
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 Only Plans — Delivered to High Wycombe
On Three 5G. 30-day rolling 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 High Wycombe
Three's 5G/4G network covers High Wycombe and Buckinghamshire with strong indoor and outdoor signal — over 99% UK population coverage.
Check Your High Wycombe PostcodeSIM Only in High Wycombe — FAQs
What happens if I go over the fair usage policy in High Wycombe?
It depends on the network. As of August 2026, Three is more flexible and lenient with its fair usage policy, and it is rare that we need to warn customers. Vodafone and O2 are much stricter: if you go over more than twice, you will be notified to monitor your usage.
What is the cheapest SIM in High Wycombe?
Silux Mobile offers some of the cheapest SIMs available in High Wycombe — 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 Buckinghamshire.
Does Three have good coverage in High Wycombe?
Yes. Three's 4G and 5G network covers High Wycombe and the surrounding Buckinghamshire area with strong indoor and outdoor signal. Check your exact postcode at siluxmobile.co.uk/network-coverage.
Can I get a SIM delivered to High Wycombe?
Yes. Silux Mobile delivers to all High Wycombe addresses free by Royal Mail Tracked 48 (2–3 working days). Faster delivery can be chosen at checkout.
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 High Wycombe is the price you keep.
Do you run a credit check in High Wycombe?
No. There are no credit checks on our SIM contracts, so anyone in High Wycombe can join regardless of credit history.
Are prices in High Wycombe inclusive of VAT?
Yes. No hidden fees — every price shown to customers in High Wycombe is the price you pay, incl. VAT. No setup fees and no price increases.