Established in 2012, Digital Mobile Spectrum Limited (DMSL) is a joint venture of the UK mobile network operators EE, Telefónica (O2), Three and Vodafone.

DMSL delivers services that support the shared objectives of its shareholders. The company's expertise lies in transparently delivering projects with multiple public and private stakeholders. DMSL's success is based on the continued support of its team members, working together in line with its values of cooperation, integrity, respect, commitment, leadership and empathy. DMSL's core functions include good governance, programme management, information security management systems (including ISO 27001 certification), IT, legal, supplier operations, procurement, quality audit, management information, relationship management, public affairs, marketing and communications. These sit alongside specialist elements relating to specific programmes such as radio modelling, fulfillment (mailing), customer experience and TV coverage planning.