Gamma Mobile User Support and Training.

Gamma Mobile

Getting Started

Gamma Mobile service is built exclusively for the UK business market; designed to deliver improved coverage for voice and data via your device that empowers, not hinders, conducting business while on the move.

Great population coverage
99% outdoor and 98% indoor


Network investment
Over £2 billion is being invested in the network to continue to improve reliability, speed and call quality.

Call and text with WiFi
Stay connected in areas with no signal


5G spectrum
With three times more 5G spectrum than any other UK network, to fully exploit the benefits of increased speeds, higher capacity and reduced latency.

You will receive a text with the settings to activate data on your handset. Accept them when they arrive.

If you do not receive this message, settings can be sent to your device.

Send data settings

For some devices the settings cannot be sent by text so you may need to manually enter Gamma in the data settings of your device by clicking below.


Manually setup data settings

Voicemail and call forwarding

The voicemail service will be set up automatically when your SIM card is activated.

The first time you call into your voicemail you will be asked to set up your PIN and record your name.

Information about the voicemail structure can be found here

To access voicmail call 07782333123 or use the short code 121 from your device

As standard all unanswered calls, and calls when you are busy or unreachable, are diverted to voicemail. Call forwarding to an alternative phone number can be added from your device settings menu or by calling the shortcodes.

Forward calls on these conditions: when busy, unanswered and out of reach

To set up
**004*[phone number]#

To switch off

To re-activate and forward to the same number as before

Forward calls unconditionally (your device will not ring)

To set up
**21*[phone number]#

To switch off

To re-activate and forward to the same number as before

Troubleshooting FAQ

  • My device says emergency calls only

    Turn the device off for 1 min and turn it back on again.

  • 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.

  • I didn’t receive my network settings

    Turn the device off and on again. If you still do not receive the network settings message settings can be sent to your device here or by texting ‘settings’ to 773000.

  • 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.

  • How do I find my phone details?

    You can find your IMEI number under the battery of your device or by dialling *#06#

    The IMEI is normally required for insurance, troubleshooting or if you lose your devices.

  • 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.

Useful Contact Details

Customer services

0333 014 0333



0333 014 0333 (option 3)
[email protected]


Lost or stolen phone

0333 014 0333 (option 3)
Available 24×7

Provisioning queries

0333 014 0333 (option 3)
[email protected]
Monday to Friday 0900 – 1700hrs