BT smartnumbers mobile

Built from the ground up to provide a range of benefits, previously only available on fixed-line phones, on your mobile

The mobile for business

BT smartnumbers mobile is a GSM service that enables individuals to have two mobile numbers on one mobile. Using a separate mobile number for both personal and business calls, individuals can manage their communications with two distinct identities on the same mobile.

This is achieved without the need for dual SIM phones, Voice over IP (VoIP) or any change to the subscriber’s existing mobile network.


Two numbers, one phone

  • BT smartnumbers mobile provides a dedicated business number on any iOS or Android mobile phone, so business and personal communications can be split.
  • ‘Call Whispering’ identifies whether a call is being made to the personal or business mobile number before accepting the call.

Split billing

  • Automatically charges personal calls to the individual, while business calls are charged directly to the organisation.

GSM call quality

  • GSM mobile call quality and availability wherever there is a mobile signal.
  • In areas with a poor mobile reception, BT smartnumbers mobile can route mobile calls to a fixed-line or IP client.

Call delegation

  • Ensure that important mobile calls are always answered by delegating calls to a colleague or a team when unavailable.

Technical specifications


  • iPhones running iOS 8.0 or above.
  • Available to download from the App Store.


  • Android devices running 4.0 (Ice Cream Sandwich) and above.
  • Available to download from Google Play.

Networks supported

BT smartnumbers mobile runs on the following UK networks.


Contact us

We love to speak

Call our sales team on

020 3162 3030

or fill out the form on the right and we’ll call you.