Unleash Seamless Connectivity with Ultra Sim: The UK's Premier Business-Grade SIM Card Provider

Providing business-grade SIM card solutions to the UK. Whether you're a small enterprise, a large corporation or a domestic user, our flexible wholesale options cater to your needs. Fuel your home office, stay connected globally with our reliable coverage and enjoy uninterrupted streaming, wherever you are. Experience excellent customer support and discover the Ultra Sim difference today.

How does it all work?


Let’s see what’s available for your location. Use our free coverage check sheet to see the possibilities. Just ask us if you’re unsure!


Our SIM only packages are tailor made for the modern business, avid travellers and all-round chatter boxes.


Now you have chosen your perfect SIM only deal! Enjoy the benefits of UltraSim for an incredibly low price.

Our Most Popular Deals

Take a look at our super flexible SIM only deals

Unlimited Club

Our most popular and affordable tariffs – perfect for short business trips & travelling on a budget.


Short term contracts with huge allowances. Effortlessly tether multiple devices to one network.


The whole package. Calls, texts & data roaming in all four corners of the world – at an incredible price.

Global Coverage

Our mobile voice packages are enabled via the channel solutions from Telefónica (O2) to ensure we can provide unrivalled network coverage.

Use our free coverage checker today and see which plan is right for you!

Who Are We?

Ultra Sim is a leading provider of business-grade SIM card solutions based in the UK. With a passion for connectivity and seamless communication, we are dedicated to serving the diverse needs of businesses and individuals alike.

At Ultra Sim, we understand the importance of reliable and efficient connectivity in today’s fast-paced world. That’s why we offer cutting-edge SIM card solutions designed to enhance productivity, streamline operations, and keep you connected wherever you are.

Whether you’re a small enterprise, a large corporation, or a domestic user, we have tailored wholesale options to cater to your unique requirements. Our goal is to empower you with uninterrupted global connectivity, allowing you to stay connected with your team, clients, and loved ones effortlessly.

Experience the difference that Ultra Sim brings to the world of connectivity. Join us today and unlock a new level of connectivity tailored to your needs.

Our CEO, Lawrence Hill on why he started Ultra Sim – “Making our world more human – by connecting lives”.

Why choose Ultra SIM?

Global Coverage: Our mobile voice packages are enabled via the channel solutions from Telefónica (O2) to ensure we can provide unrivalled network coverage.

No Annual Price Increase: We won’t force annual price increases on you, you can be confident that your bill will be just what you expect with our flexible monthly plans.

Roaming: We offer packages to suit all needs even if you are constantly on the travel for either business or pleasure we have got you covered.

Fair Pricing: We offer a great price for the value and support that we have to offer to our customers.

Part of the Obedio Family: Ultra Sim is part of the Obedio family, giving all of our customers access to a range of internet solutions and vast expertise in multiple areas.

Business Grade Quality: All the benefits that come you would expect from top of the range business sims, from having access to a much larger data pool, to being a much more reliable solution to a normal sim.


Yes, we have a range of special offerings on different packages. You can choose betweeen EE, O2, Vodafone & 3 on selected packages. Contact for more information.

The widespread use of mobile phones has made them an essential part of modern communication, leading many businesses having the need to supply their employees with dedicated mobile devices and corresponding SIM cards. Visit Ultra Sim now to find out more about how we can help your business get coverage everywhere.

In this context, business SIM cards serve as connections linked to a company’s mobile account. If a business has mobile contracts, each user will be provided with a business SIM card. These business SIMs differ from consumer SIM cards, which are typically issued by network providers for individual mobile phones and come with predetermined text, call, and data allowances.

Business SIMs, on the other hand, are associated with business accounts and often offer shared plans or packages. They are supplied by business mobile providers (like UltraSIM) rather than consumer networks like O2, EE, 3 or Vodafone, despite still being hosted by these networks.

Distinguishing business SIMs from consumer SIMs is crucial, as the former offer certain advantages over the latter.

  • Cost savings: By purchasing multiple business SIMs under one provider and plan, businesses can reduce running costs and administrative burdens. Choosing a provider like UltraSim can also provide access to custom and discounted tariffs from leading providers such as O2, 3, EE, and Vodafone. (We can offer Unlimted data, texts and calls on any network for £35p/m + VAT, at fantastic value for a business grade SIM in todays market.)                                                                                                                                                                          
  • No Qualms Contract: UltraSim offer 1 month contracts with no strings attached for ease of mind for our customers, but we do however offer discounted prices for those who wish to commit to 12/24 month plans which could lead to big savings in the long run.                                                                                                                                                                                                               
  • Shared data/unlimited data: Business SIMs that utilise shared data help minimise running costs and prevent unexpected charges. Each business SIM can draw from the shared data pool, preventing out-of-bundle data charges even if a user has high data usage. However, with Ultra SIMs offerings of ‘UNLIMITED DATA’ being such great value there’s no real need for this as we can offer a stress-free experience eliminating the need for data to be shared and completely remove any chance of unexpected charges.                                                                                                                                                                                                               
  • Reduced Signal Congestion: Ultra SIM cards offer the advantage of reducing signal congestion, particularly in areas with high mobile network traffic. By leveraging advanced network management techniques and optimizing data usage, Ultra SIM helps alleviate network congestion issues, ensuring smoother and more reliable communication for businesses.                                                                                                                                                                                                               
  • Improved Contention Ratios: Contention ratio refers to the number of users sharing the available bandwidth on a network. High contention ratios can lead to slower data speeds and reduced performance during peak usage times. With Ultra SIM, businesses can enjoy improved contention ratios, as these SIM cards are designed to provide dedicated and prioritised access to network resources. This translates to faster data speeds, enhanced reliability, and a better user experience for business mobile users.
  • Flexible tariffs: Business SIMs provide more flexibility in terms of tariff options. While consumer SIMs usually offer pre-determined tariffs, business SIMs can be tailored to suit specific business needs.                                                                                               
  • Shared data: Although some consumer SIMs may support shared data, it is less common. Businesses often prefer having a shared pool of data that all their SIM cards can utilise, ensuring no individual user exceeds their data limit. Meaning no surprising phone bills.                                                                                                 
  • Business account: For businesses requiring numerous mobiles, managing individual accounts can be challenging and costly. Managing all mobiles under one provider using business SIMs simplifies administration, enables better phone bill tracking, and allows for account adjustments when necessary.                                                                                                                                                                       
  • Bulk upgrades: Upgrading mobile tariffs and devices can be a time-consuming process. With business SIMs, businesses can perform bulk upgrades and changes for all their SIM cards simultaneously, streamlining the process.

Of course every situation is different and the ‘best’ SIM deal for each individual will differ but our most popular package that covers all bases is our Unlimited TEXT, CALLS & DATA (£35p/m +VAT), which allows customers to chose provider between EE, Vodafone, 3 & O2.

Let’s stay in touch.


We’ll let you know of any new offers, products or updates. Don’t worry, your information won’t be shared with any third parties & you can unsubscribe at any time.

Contact us

If you have any questions about any of our products or services then please don’t hesitate to contact a member of the team today! A representative will be happy to help you.