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.
Getting started with
A new mobile number
If you do not have a pre-arranged activation date please call 0333 014 0333 to activate your service.
Your service will be live within 2 hours of activation. Push the SIM out from the holder.
Insert the SIM into your phone.
Getting started with
An existing mobile number
A date to transfer your existing mobile number will have been arranged
On your arranged transfer day push the SIM out from the holder
Insert the SIM into your phone making sure you have both old and new SIM cards with you on the day
Mobile Data
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.
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.
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
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
#004#
To re-activate and forward to the same number as before
*004#
Forward calls unconditionally (your device will not ring)
To set up
**21*[phone number]#
To switch off
#21#
To re-activate and forward to the same number as before
*21#
Useful Contact Details
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
