Mobile Deals in Cardiff

Utility Warehouse

UW offers a fantastic range of mobile services in Cardiff.

Enjoy our best mobile deals with plans tailored to your needs, whether you’re after unlimited data or a great-value option.

With UK-wide network coverage, you can rely on UW to keep you connected.

You can also save more on your monthly bill by bundling additional UW services, like energy, broadband, and insurance. The more you bundle, the more you save.

Join our 9,109 mobile customers in Cardiff today, who are collectively saving an estimated £1,666,947 per year.

Over 80 Awards and Counting

Here are a few things that make UW special

Have questions? Speak with our Partners today to learn more.

Beat rising bills with guaranteed savings

The July Energy Price Cap is rising by over £200 – so now’s the perfect time to lock in a fixed tariff. Plus:

  • Up to £400 to help switch, in as little as 2 days
  • Full Fibre from £23.95 & up to 3 free SIMs
  • 3 months free annual Boiler & Home Cover
  • Up to £150 Cashback Card bonus credit
  • Guaranteed savings, or double the difference

Don’t miss out

Add up to three extra unlimited data SIMs to Unlimited Max for free for six months.

The more services you add, the bigger the savings you can unlock. Guaranteed.

Build the perfect bundle of energy, broadband, mobile and insurance that’s right for you.

Peace of mind

Here’s a few ways you can save with Utility Warehouse:
– Cheapest variable energy in the UK
– Unlimited data SIM for £23 or get 10GB for £5
– Broadband for just £23.95 a month with no connection fees
– A Cashback Card that gives you money off your bill when you do your every day shopping

Streamline your services

One bill – for all your home services.

One account – with only one password to remember.

One number – for our award-winning Customer Services team

Rated by experts

Best Value Energy Supplier rated by Expert Reviews and rated ‘Excellent’ on Trustpilot.

The UK’s best value Unlimited+ multi-SIM mobile deals, with 99% UK coverage.

Five star rated building and contents home insurance plus boiler and home cover.

How does UW work?

UW offers a diverse range of mobile services in Cardiff.

By bundling your mobile plan with energy or broadband, you could unlock estimated savings of up to £259 a year.

This allows for a streamlined approach to managing your bills, making your spending simpler and more efficient.

Speak to one of our 1,219 Partners in the Cardiff area to discover some of the best mobile deals tailored to your needs.

Consider adding more services like insurance and a cashback card to save even more.

Energy

Compare our fixed and variable rate tariff deals.

Broadband

Full fibre with no installation or connection fees.

Mobile

Unlimited data, calls
and texts with 99% UK coverage. 500GB fair use policy applies.

Insurance

Defaqto and Moneyfacts five-star-rated Home Insurance.

What our customers say

Partners in and around Cardiff

Merthyr Tydfil

Hi, I’m Allan, based in South Wales. I work as an Administration Manager within the NHS, alongside building my Utility Warehouse business. I’m relatively new to UW and really excited about growing my business and getting to know my customers, making the service as personal as possible. I’m passionate about helping people make smarter financial choices, especially with the rising cost of living. I’m also a proud dog dad and love spending time with those closest to me. I’m both a UW Partner and customer, so I genuinely use and trust the services I recommend, helping others save or earn money too. If you’d like my help, feel free to get in touch.

Aberbargoed

Hi I’m Nic! Always happy to help! I live in the South Wales valleys along with my husband, 2 teen children and my beagle pal Jax! I am a Finance Manager come entrepreneur in my spare time! UW has provided an excellent supplement income to help us as a family! What I love most about it is I get to help lots of others to save and earn. In a world of rising costs, I take utmost pride in looking after my customers and ensuring a quality service. I enjoy meeting people via this business. I am friendly, approachable and flexible. You can reach me almost any time of the day! Let’s chat!

Pontyclun

Hi, I’m Sarah, mum of 3 grown up kids and 4 beautiful grandkids. I live in a little village in Rhondda Cynon Taff, approximately 10 miles from Cardiff. I worked for over 32 years in the University of South Wales and was made redundant in June 2025. I’m now a carer for my mum has Alzheimer’s, and I look after the 4 grandkids so it was hard to find work that fitted my lifestyle. Then I became utility warehouse customer and soon after joined as a partner, so now I’m helping people save money on their utility bills and loving it! It’s so rewarding to know that I’m helping people save money.. Get in touch if you want me to help you save too!

Compare mobile deals to save up to £180 a year with Unlimited Max

Unlock endless browsing and streaming with Unlimited Max or stick to Essential Max for our most affordable option. Plus, get bigger savings for the whole family when you add extra SIMs for free until the end of March.

Unlimited Max | £23

Save up to £174 with Unlimited Max – from just £23 a month.

  • 99% UK coverage
  • Works on 4G & 5G
  • Wi-Fi Calling
  • Monthly rolling contract
  • EU roaming included
  • Up to 3 extra SIMs FREE

Essential Max | £5

Our cheapest Sim-only deal from only £5 a month.

  • Works on 4G
  • Wi-Fi Calling
  • Monthly rolling contract
  • More multiservice benefits

Best UW mobile deals in Cardiff

UW offers some of the best mobile deals in Cardiff.

For just £23 a month, you can enjoy an Unlimited Max SIM, complete with unlimited data, texts, and minutes.

When you take more than one Unlimited Max SIM, additional ones are just £0 each a month.

All mobile plans come on flexible contracts, ensuring you’ve got the right package for your needs.

You can choose to keep your current phone number or opt for a new one — it’s all about your preference.

Why choose UW for Mobile?

Our SIM-only packages are second to none. Here’s what’s included in both:

● No speed restrictions
● Strong 99% network coverage across the UK
● Roam like you’re in Cardiff in the EU
● Wi-Fi, 4G and 5G calling on Unlimited Max
● Flexible monthly contract
● Up to £400 towards contract exit fees

Pick the SIM option that works best for you

UW provides some of the best mobile deals in Cardiff that keep everyone connected at all times.

This multi-SIM deal ensures no one ever runs out of data, so you won’t need to worry about extra charges.

Starting at just £23 per month, you can also add up to three more SIMs from £0 each per month.

With UW, you could see savings on your bills, enhancing your connected lifestyle.

A great value SIM-only deal in Cardiff

UW provides excellent mobile options in Cardiff.

Our Essentials MAX SIM-only plan is perfect for those who want reliable connectivity without high costs.

For just £5 a month, get 10GB of data, ensuring you stay connected for all your essential communication.

Enjoy fantastic value with UW.

Peace of mind promise

Switching all your home services to UW means getting our best value deals, all in one easy-to-manage bill.

You’ll receive up to £400 towards any early termination fees with existing suppliers and 30 days to change your mind without any penalty.

Experience the UW difference in Cardiff.

More Partners in and around Cardiff

Our Partners are a team of local Utility Warehouse experts up and down the country, who help people save money on their bills. With 70,000 Partners across the UK, there’s someone nearby who’ll be happy to chat.

Areas in and around Cardiff

  • Penarth
  • Barry
  • Llandaff
  • Whitchurch
  • Radyr
  • Caerphilly
  • Newport
  • Pontypridd

Mobile Guides

How to keep your phone number when switching networks

22 Oct 2025 - When it's time to switch up your mobile plan, telling everyone about your new number can feel like a hassle. The good news is that there’s actually a quick and easy way to keep the same phone number: with a PAC code.

What is Data Roaming?

21 Jan 2025 - Data roaming lets you stay connected when you're travelling abroad. But before you switch on and start browsing, there are a few things you'll need to know. Read all about roaming today.

How much mobile data do I need?

10 Jan 2025 - Whether you're a light user who sticks to browsing the web or someone who streams and makes video calls on the daily, figuring out how much mobile data you need can feel like a guessing game. Learn more with our guide.

A Guide to Mobile Networks in the UK

8 Jan 2025 - We’ll take you through everything you need to know about mobile networks in the UK, including the major players, coverage, and how to select the right provider for your needs.

Frequently Asked Questions

We’re the UK’s only genuine multiservice provider. We help people save on their household bills by bundling their energy, broadband, mobile and insurance into one. We offer guaranteed savings. We’re trusted by over 1,386,585 customers and are rated Excellent on Trustpilot.

UW Partners in and around are people just like you, who earn an extra income by introducing others to UW and helping them sign up as customers. They also help people to become a UW Partner and start earning an income by recommending UW to their friends and family.

Yes, of course – over 1,386,585 customers and 70,000 UW Partners already do. We’re also regulated by the energy regulator Ofgem, the telecoms regulator Ofcom, and the Financial Conduct Authority. We’ve been doing business for nearly three decades and are listed on the London Stock Exchange, which means we’re one of the UK’s largest publicly-owned companies.

A SIM-only deal gives you data, minutes, and texts for a set monthly cost. However, you don’t get a new phone like you would with a mobile phone deal – you just get the SIM.

Of course. You can use our mobile SIMs with any unlocked handset or any phone on the EE network too.

The easiest way to tell if your phone is unlocked is by inserting a different SIM card from another network into your mobile. If you’re able to connect to the internet, make calls, and send text messages, your phone is likely unlocked.

If you don’t have another SIM card from a different network provider, you can also check by going into your phone’s settings.

Yep, simply contact your previous network provider or text ‘PAC’ to 65075 to get a code which will allow you to bring your current number over to your new SIM. This won’t disrupt your service either. Find out more about how to keep you current mobile number.

Unlimited data means that you don’t have a cap on your data allowance each month in and the rest of the UK. There are no restrictions on how much data you use, so you won’t have to worry about using up all your allowance.

Our Unlimited data, calls and texts SIM-only plan is perfect for surfing the internet, taking video calls, or even streaming media, as you can use as much as you need.

We’re offering EU roaming as part of our Unlimited tariff, so you can take your unlimited data abroad and use up to 14GB of it at no extra cost. It’s part of our Roam like Home service, which lets you use your allowance in 45 locations across Europe. You can also send texts and make calls back to the UK as you would normally with your allowance. Our Unlimited tariff has no data usage cap when browsing in the UK.

A family plan is a special family SIM-only deal that covers multiple SIMs. With a family plan, you can choose a deal that ensures your whole household is connected, all as part of a single convenient bill.

All your home services in one

All your home services in one

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Once you’ve submitted your details, I will follow up to arrange a time that’s convenient for you to discuss UW’s services and/or Partner opportunity. They will help you choose what’s best for you. For further information on how we collect, use, and look after your personal information, please refer to our privacy notice for more information.
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