SIM Only Plans in Caerphilly
SIM only plans in Caerphilly from £5/month on Three's 5G — data-only, unlimited and multi-network options.
Silux Mobile is a SIM only provider serving Caerphilly and all of Caerphilly. 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 Caerphilly Chooses Silux Mobile
Delivered to Caerphilly
Free Royal Mail Tracked 48 delivery (2–3 working days) anywhere in the UK including Caerphilly and Caerphilly.
Three 5G in Caerphilly
Our SIMs use Three's 5G/4G network with strong coverage across Caerphilly 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 Caerphilly
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 Caerphilly
Three's 5G/4G network covers Caerphilly and Caerphilly with strong indoor and outdoor signal — over 99% UK population coverage.
Check Your Caerphilly PostcodeSIM Only in Caerphilly — FAQs
What happens if I go over the fair usage policy in Caerphilly?
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 Caerphilly?
Silux Mobile offers some of the cheapest SIMs available in Caerphilly — 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 Caerphilly.
Does Three have good coverage in Caerphilly?
Yes. Three's 4G and 5G network covers Caerphilly and the surrounding Caerphilly area with strong indoor and outdoor signal. Check your exact postcode at siluxmobile.co.uk/network-coverage.
Can I get a SIM delivered to Caerphilly?
Yes. Silux Mobile delivers to all Caerphilly 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 Caerphilly is the price you keep.
Do you run a credit check in Caerphilly?
No. There are no credit checks on our SIM contracts, so anyone in Caerphilly can join regardless of credit history.
Are prices in Caerphilly inclusive of VAT?
Yes. No hidden fees — every price shown to customers in Caerphilly is the price you pay, incl. VAT. No setup fees and no price increases.