Three 500GB Data, Calls & Text Sim - Pay monthly contract - Activate your sim & port your number across - £11 per month for 24 months

I bought this Three 500GB 5G SIM to use in a portable WiFi router at our martial arts academy and for travel across the UK — and I honestly wish I’d discovered it sooner. It’s preloaded with a huge 500GB of data every month until October 2025, which is phenomenal value, especially for anyone relying on mobile broadband for work or streaming.What I loved straight away:• Instant Activation: Pop the SIM in, wait a few minutes, and you’re online. No contracts, no registration hurdles, no top-ups to fiddle with. It just works.• Speed and Stability: I consistently get fast, reliable 5G and 4G coverage, especially in South Wales where we don’t always have the best signal. It’s been stable enough for Zoom meetings, streaming video, and multiple devices running at once via the router.• True Monthly Reset: Each month, like clockwork, the data resets. No hidden catches or rolling renewals — it’s exactly as advertised.What to keep in mind:• It’s a data-only SIM, so no calls or texts — which is perfect for routers and tablets, but worth knowing in advance.• If you’re using this in a phone, you’ll want to turn off automatic updates or background refresh if you’re a heavy app user — 500GB is a lot, but with 4K video or large downloads, it can disappear quicker than expected.Compared to pay-as-you-go options, this is dramatically better value. You’re essentially getting business-grade data at a fraction of the cost of regular rolling contracts, without the commitment. And unlike many data bundles, there’s no daily limit throttling — it’s full-speed access the whole time.Final verdict:If you work remotely, travel often, or just want a backup internet source that won’t let you down, this SIM is a no-brainer. It’s plug-in peace of mind until 2025 — and that’s rare these days.

I inserted the SIM into my portable USB WiFi router and it worked straight away.I will look at buying a monthly plan in future, as I purchased this on June 3rd, and it will expire on October 8th. So I will only have 4 months worth of use for the 28 UK pounds I paid, but that's not bad considering I can use up to 500GB data a month, not that I will use anything like that amount. This was bought as an experiment to see if it could provide me with a backup internet connection and also when used with my USB router, I have full time Internet in my cat, and allows the kids tonise thier tablets in the car on long journeys.

This SIM deal is awful. Sure, it's cheap, but it's definitely not cheerful. Somehow, 3, the (near) equal worst network in the UK, have exceeded their dismal reputation. Occasionally they deliver respectable data bandwidth, (I'm based in the premium inner-city suburb of Islington, so you'd think they had their best network infrastructure here), but almost always, the upload rate is so bad that the connection fails. My (various 4 and 5G) phones do not recognise that there is a server ready to respond - and they time out. This is not building or exact location-specific. It's really poor and unstable all around the area.Let me spell this out... If you need a SIM to do any professional activities, then this is definitely not for you. You absolutely cannot do video calls, because the network is so unstable, that your call will drop out and cut off. If you want a short-term SIM for downloading videos or large amounts of data in the background - and don't mind restarting the downloads multiple times, then (maybe) this deal might work for you.The bottom line is, this is a seriously low-grade product/service and you get very little for what you pay.

I got this for our work when we are travelling in the UK.I have found the 3 network to be pretty reliable as compared to others when trying to connect in certain areas.It also is being used as a back up when we are home when the house broadband is being a bit slow( we have 2 work from home work stations both using internet).You have to walk around the house finding the areas that see the 5G signal best.This will depend on your area and it will be worth checking coverage for 3 in your area before comitting..We got a swan-neck phone holder so that we can suspend the mifi gadget in the best area for us indoors and it works pretty well and can get stupid fast download speeds when set up with 5 mhz wifi and matches the house broadband when set up as 2.4mhz (upload is better on the lower setting).You get 4g or 3g if it cant get the 5G signal for any reason.If you can afford the initial purchase price, it is very good value over the life of the sim, much much better than a monthly subscription standard sim.I had no setting up to do with it.This might be because I put it in a mobile hotspot type mifi and not in a phone but for me, it was put it in, turn it on and use it.You do need to keep tally of your useage yourself, you cant register it on 3 and see it that way.If your using a lappy with it, you can generally find a program that will do the tallying for you and some mifi gadgets will do it. Android phones can be set up to show the months data use and reset on a certain date so thats a way to do it if running through a phone.Very happy with this and hope they are still available when we need another.

So far working well, I have this connected to a personal hotspot and it works wellYou simply put it into your device and away you go, you can not make calls unless you use kinternet call services as this is a data only SIM card, you can the. Just simply get it unlimited texts and calls from elsewhere for around five to six pounds and it will work out to 500gb data plus your unlimited calls anod texts for just approx £10..Easy to use and set up you don’t need any additional set up just the sim you can use it on a duel sim or you can use it for your hotspot.

Use this at a site where there is no land line. The only limiting factor is that the local phone mast has a restricted data bandwidth but that's not the product's fault and I've tested it against O2, Vodafoen and EE and it's most reliable for our needs.