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01268 495555

Who we are and what makes us tick

Firstly, we are an O2 Direct Partner

This means we are authorised by the O2 Network to handle business mobile accounts on behalf of them.  As one of the largest and top performing O2 Partner’s in the UK, we share the commitment to providing a great customer experience and a trusted approach.

With a Direct Partner you, the customer, get the enhanced benefits of our business expertise, flexibility and personalised service.  Unlike the networks, we treat you as an individual by offering a bespoke service throughout your mobile phone contract and after.

Established in 2002 we provide a professional business service you can rely on. We are in it for the long haul and would very much welcome the opportunity to manage your O2 contract. Here’s what we offer;

First class business service

At ADSI, we pride ourselves in excellent customer service; the majority of our customers come from referrals from our happy customers.  We aim to answer your call within 3 rings and respond to an email enquiry within 24 hours (during working hours).

We understand that you are busy and simply aim to make managing your business mobile phones a lot easier, leaving you to get on with running your business.

 With us, you get your own dedicated Account Manager

This means no call centres, no faceless voice at the end of the line; you have a named individual – a personal service just for you. Your account manager will handle your mobile phone account(s), give you advice, keep an eye on your bill expenditure, alert you of unexpected costs that could be avoided and inform you of any savings to be made.

 Guaranteed on-going account management

Depending on your mobile requirements, your airtime bill(s) will continue to come from O2, but you may be billed by us if you decide to have handsets or tablets on an ADSI Refresh contract. Your initial contract, upgrades and on-going account is dealt with by us.

You will benefit from our monthly Bill Manager which includes your O2 invoice, emailed as a pdf.  Our unique bill manager report can be tailored to suit your business and individual needs.  Mobile expenditure can be broken down into departments or cost sectors, as well as highlighting premium rate calls, data charges, international costs and much more.

Handset(s) if required

We will supply you with your preferred handset if you need one.  If you have a problem with the handset throughout your contract; if it gets broken, if you have a technical issue or just need advice setting up – we will help you.  In most cases we will provide you with a loan phone whilst yours is in repair/lost/stolen.

If you need to place a bar on a stolen/lost phone, we can do this for you.  We will alert you when you are due to upgrade or when your contract is due for renewal. We will handle the entire process for you.

 A host of other business services available to you…

 As well as our Mobile communications expertise, we also provide solutions to reduce everyday costs and improve efficiency in necessities such as Mobile Working, Connectivity, Fixed Lines, VoIP Telephony, IT Support and Gas/Electricity Billing.

We have over 20 years’ experience in these fields, so we are excellently placed to assist you.

  • VoIP – improve efficiency and cut costs on everyday telephony with an industry lead system giving you free UK calls to landlines & mobiles and unified communications so you never miss that call!
  • IT Support – take advantage of our Service Desk Support and keep your business systems running, solve issues, carry out IT projects & updates, keep your network and systems safe!
  • Energy -Gas & Electricity need to be controlled, our experience energy team will find the best tariff and supplier for your usage, so you’ll never overpay again. Hassle free switchover, we do all the work for you!

Want to find out more and start reaping the benefits? Call 01268 495555. 



  • “The fact that we have kept our business with ADSI in such a  competitive market for such a long time speaks for itself really. Service is great always efficient. Clare manages our requests and queries promptly and efficiently with the bonus that she is always such a delight to talk to!”

    Aveat Heating
  • “We switched our telephone service from BT to ADSI and have been delighted with the service so far. Everyone we have had contact with has been helpful and professional and I wouldn’t hesitate in recommending them.”

    Lugano Residence
  • “I would like to thank Dave Cribbs from ADSI for advising and helping with the new VoIP system that we now use. This enables myself and my virtual assistant to answer every call we receive.  The increase in answered calls has led to more successful bookings.”

    Body Beliefs Osteopathy
  • “Since ADSI have taken over our mobile phone management we have not had a single issue. They have even dealt with an ongoing problem that we had been trying to resolve for over a year!

    Dave is always really helpful and responds to any queries we have quickly and efficiently. I would have no hesitation in recommending them.”

    HR Dept
  • “I would like to thank Dave and ADSI for making my Electricity switch over both effortless and at the same time lucrative.

    By signing just a couple of letters I have now switched and am saving over £100 pcm.

    I have no hesitation on recommending you and your company to friends and clients alike.”

    Quest Printing & Design Ltd
  • Energy: Simon introduced himself to us when he took over our account and has been friendly and helpful from the very first conversation. We have a couple of properties on the same street, some of which we had forgotten to inform ADSI of and we had got confused as to what was currently in contract/where we were paying high tariff rates.  Simon got this organised with minimal input from us which helped massively and also managed to save us money at the same time.

    I feel confident that our account is in safe hands which gives us one less thing to think about in the running of our business, I know Simon will be in touch as and when I need to know something. I would not hesitate to recommend ADSI Energy and have no intention of going elsewhere as I know they will do everything they can to get us the best deal possible.”

  • “We are now into our third year with ADSI and can only say what a BIG improvement on our previous provider.

    Calls are always answered promptly by a person, not an ‘option machine’.  Each time we have added a new connection the equipment has arrived on time.  Brad Foote has been our dedicated account manager and all it has taken is a quick phone call to action our requirements.

    Ongoing, our account manager keeps a watchful eye on our account and quickly highlights any unusual activity allowing us to address or amend our tariff accordingly. The technical support ADSI provides is also extremely helpful and timesaving.  I would have no hesitation whatsoever in recommending this company.”

    Almor Group
  • “Always been very happy with ADSI from day one; we get contacted constantly by other companies but we would never leave ADSI as the service is fantastic.

    Our account manager, Brad, at ADSI is faultless – I would highly recommend.  He helps with all queries and is knowledgeable, friendly and we feel confident that he gets us the best deal and give us the best advice.

    We have saved a considerable amount of money over the years and the control we have over our mobile phones now is second to none. Any issue or query is dealt with promptly and efficiently, can’t praise highly enough.”

    Fire Protection Ltd
  • “‘Welcome to the World of Mobile Technology’ ADSI form a vital part of our arsenal to allow us to get on with life.  They have been integral to our business growth providing a reliable and cost effective way to run an essential service to our company and staff who rely on constant communication.

    As a company and personally, ADSI know exactly who we are and our habits so can advise and manage our services honestly and precisely.  You have to enjoy working with suppliers otherwise what’s the point? It’s an honest, open and thorough relationship that we are very grateful to have in our business life.”

    Models 1
  • “Always been very happy with ADSI from day one. We get contacted constantly by other companies but we would never leave ADSI as the service is fantastic and our Accounts Manager is brilliant – he helps with all queries and is knowledgeable, friendly and  we feel confident that he  gets us the best deal. Many companies we’ve used over the years have been in it for the money only but with ADSI we feel that they really do put the customer first, can’t praise highly enough.”

    East Durham Community Transport
  • “We are really happy with overall service from ADSI; it’s great to have someone assigned to our account that can help us with any issues. Our overall phone costs have greatly decreased and we are extremely happy with ADSI.”

    McCue Corporation
  • “We have dealt with ADSI now for approx. 7 years, and have been continuously impressed with the good old fashioned level of customer service. Not only do they keep their eye on our account to make sure it’s the best value for us and offer us great deals on new products, but the back-up is second to none. I would have no hesitation in recommending them to business colleagues. Keep up the good work!”

    Pink Scaffolding
  • “ADSI offer a personal service delivered in a very professional way.  I am very satisfied with the service and support provided by ADSI.  I am confident that when I call, my questions will be answered without delay and this is delivered at a very competitive price.  ADSI look after their customers by providing a pro-active service that lets me know if I need to make any changes to my mobile account.”

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