Stay in sync with customers and stakeholders with Gamma Mobile.

Modern organisations require modern comms infrastructures that enable workforces to access powerful voice, data and other dynamic features, no matter where they are.

Gamma Mobile can extent the power of fixed telephony to your entire mobile estate. We offer outstanding levels of coverage as well coupled with exceptional functionality to ensure you remain available to customers and stakeholders when off-site.

Learn more about how our voice, data and mobile products can help you achieve your comms goals by contacting Gamma or one of our specialist partners.


  • I have been asked for a PIN code for my SIM

    The default PIN for your SIM card is 0000 should you need it. Please note that if you enter your PIN code incorrectly three times your SIM card will be blocked to all calls.

  • I have blocked my SIM card how do I unblock it?

    To unblock your SIM card you will need to obtain a PUK (Personal Unblocking Key) code by calling us on 0333 014 0333.

  • What is the voicemail number to call?

    To access voicemail dial 07782333123. Alternatively you can dial the short code 121 from your device.

    If you are using your existing phone, make sure all previous voicemail numbers and diverts are deleted from your current phone memory to avoid any difficulties with your new voicemail service.

  • I can’t connect to the internet on my phone

    The data settings may need to connect to the network may be missing. These can be sent to your device here.

  • My phone is lost or stolen

    If your phone is lost or stolen please call us, on 0333 014 0333, and we will bar your SIM card.

    If you know the IMEI number for your device, we can also bar the device, preventing your device from being used with any SIM from any UK network.

  • My device is not working with my new SIM

    If you are using a phone that was provided by a different network operator it maybe be locked to that network and will need to be unlocked by contacting your previous provider.

  • When will the transfer take place?

    The transfer will generally take place anytime between 11am – 4pm, Monday to Thursday

  • How will I know when I have been disconnected from my old network?

    If you try to use your old SIM in your device you will receive one of these messages ‘SIM registration failed’ or ”Network unavailable’. You may experience incoming calls on one SIM card and outgoing calls on the other SIM card as well as some downtime.

  • How will I know when my number has been transferred?

    When you receive a ‘SIM registration failed’ or ‘Network unavailable’ message when using your old SIM, your number will have been transferred.

    If you do not have an active service by 5pm on your transfer date, restart you device and if you still don’t have any service contact us on 0333 014 0333.

  • Do I need to be in the UK to transfer my number?

    You will need to be in the UK on the day in order for the transfer to be successful.

  • What tariffs are available?

    We offer a range of business mobile deals with tariffs including pay-as-you-use, single user, shared user and unlimited, plus a selection of bolt-ons including text, business mobile data, and international roaming. Alternatively, we can create a bespoke package tailored to your needs.

  • What if we use a lot of data?

    We have a range of tariffs to suit any data requirement. Whether browsing or messaging, our data network will give you the speeds/connectivity you need. We also do not cut you off when you reach your threshold – instead an alert is sent letting you know you are reaching your limit.

  • What other 4G functionality does Gamma offer?

    We have a range of 4G-driven services that cover the whole gamut of business operations – from private APN services to Internet of Things and instant connectivity in new premises/outlets while a fixed line is being installed and then providing a back-up to that fixed line.

  • What about your plans for 5G?

    We are currently putting our 5G infrastructure in place and are discussing with our existing client base how their operations will benefit from 5G’s connectivity, speed and flexibility. It is important to plan now as 5G’s impact will be significant as it is rolled out nationwide.

  • What support services do you offer?

    With Gamma Mobile, you get the same service excellence we already deliver for our other telecom offerings. Our UK support teams are co-located so you can always get through to the right person to handle your query, our teams experts in both fault resolution and provisioning.

Featured products.

Brands that trust Gamma.

In my career I always had to make decisions on incomplete information. As a leader you don’t always have enough intelligence, and if you are crippled by having to wait for more data before you make a decision, it might be too late. The timing is as critical as what the decision is

Baroness Manningham-Buller

Brands that trust Gamma.

All the install, provisioning, direct routing and commissioning was done in advance virtually, and Gamma worked with our previous telecom provider to port all of our DDI numbers over, their project managers were brilliant and worked well together with our own people.

Michelle Hones
Senior Business Analyst

Brands that trust Gamma.

On go-live day we had a team of Gamma people here on site to make sure everything went smoothly. All the ported numbers were working as they should. I don’t think anyone experienced any downtime, and no inbound calls ever encountered a ‘dead’ line

Michelle Hones
Senior Business Analyst

Brands that trust Gamma.

I can’t fault Gamma’s service. They are one point of contact and their people are all very knowledgeable, professional and responsive: exactly what you need from a supplier.

Michelle Hones
Senior Business Analyst