Is the data on an unlimited 5G SIM really unlimited?

Most of these plans have no data cap. The O2 Unlimited Data Business SIM has a 650GB fair use limit a month, which is more than most routers use. Check each plan's terms before you order.

Will an unlimited data SIM work in my router?

It works in any unlocked 4G or 5G router that accepts a standard SIM. Enter the APN settings if your router asks for them.

Can I use an unlimited data SIM abroad?

The O2 Unlimited Calls, Texts & Data SIM includes roaming in the EU, USA, Canada and Jamaica. The other plans are for UK use.

What is the shortest contract?

The Three Unlimited 5G Data SIM has a 1-month option, and the O2 plans have a 3-month option. Longer terms cost less per month.

5G Unlimited Data SIM Cards

An unlimited 5G data SIM gives a router, laptop or mobile broadband device as much UK data as it needs, with no monthly allowance to watch. GleeSim offers unlimited data SIMs on Three and O2, including one that adds calls, texts and roaming in the EU, USA, Canada and Jamaica. Plans start at £17.00 a month.

Showing all 3 results

Three Unlimited Calls & Data Plan for Seamless Connectivity - Gleesim.co.uk

iPhone 17 Series 256GB – Unlimited Data Plans on Three Network - Gleesim.co.uk

Shopping cart

5G Unlimited Data SIM Cards

NETWORK PROVIDER

CALLS

TEXT/SMS

ROAMING

Product Tags

Shopping cart

5G Unlimited Data SIM Cards

Three Unlimited 5G Data SIM for UK – Three & Voda fone Network | Dynamic IP | Plug & Play

O2 Unlimited Call Text and Data SIM- Free EU, USA, CANADA, & JAMIACA Roaming

O2 Unlimited Data Business SIM | 650GB FUP | Dynamic IP | £19/month UK

NETWORK PROVIDER

CALLS

TEXT/SMS

ROAMING