SIM Only Plans in Portsmouth
SIM only plans in Portsmouth from £5/month on Three's 5G — data-only, unlimited and multi-network options.
Silux Mobile is a SIM only provider serving Portsmouth and all of Hampshire. Every SIM runs on Three's 5G/4G network with no contract, no credit check and free next-day delivery.
Why Portsmouth Chooses Silux Mobile
Delivered to Portsmouth
Free next-day Royal Mail delivery anywhere in the UK including Portsmouth and Hampshire.
Three 5G in Portsmouth
Our SIMs use Three's 5G/4G network with strong coverage across Portsmouth 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
SIM Only Plans — Delivered to Portsmouth
On Three 5G. No contracts.
Calls + Data
Unlimited calls
£8/mo
- 30GB data
- Unlimited calls & texts
- 4G/5G
- No contract
Unlimited
Unlimited
£18/mo
- Unlimited data
- Unlimited calls & texts
- 5G
- Go Roam 71+ countries
Three 5G Coverage in Portsmouth
Three's 5G/4G network covers Portsmouth and Hampshire with strong indoor and outdoor signal — over 99% UK population coverage.
Check Your Portsmouth PostcodeSIM Only in Portsmouth — FAQs
What is the cheapest SIM in Portsmouth?
Silux Mobile offers some of the cheapest SIMs available in Portsmouth — from £5/month on Three's 5G network, with no contract and free next-day delivery to Hampshire.
Does Three have good coverage in Portsmouth?
Yes. Three's 4G and 5G network covers Portsmouth and the surrounding Hampshire area with strong indoor and outdoor signal. Check your exact postcode at siluxmobile.co.uk/network-coverage.
Can I get a SIM delivered to Portsmouth?
Yes. Silux Mobile delivers to all Portsmouth 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 Portsmouth is the price you keep.
Do you run a credit check in Portsmouth?
No. There are no credit checks on our SIM contracts, so anyone in Portsmouth can join regardless of credit history.
Are prices in Portsmouth inclusive of VAT?
Yes. No hidden fees — every price shown to customers in Portsmouth is the price you pay, incl. VAT. No setup fees and no exit fees.