"To attract investment and reap the full economic benefits of mobile broadband, regulators need to provide access to a critical mass of spectrum," said Phillips.
"For the EU and US, this can be achieved through the harmonisation of bands, on similar contractual terms and conditions, as well as limited geographic and timing exclusions," he said.
"For these reasons, shared spectrum is not a substitute for exclusive-access spectrum, and governments and regulators should not fully rely on shared spectrum for the provision of mobile broadband in the future."
Asked why the report, opposing government plans, had been done in the first place, a GSMA spokeswoman told ComputerworldUK: "Because spectrum management has many facets - including issues such as interference, spectrum auctions and license processes - the GSMA contributes on behalf of mobile operators to the work of regulators with market projections, analysis, regulatory guidance and policy recommendations based on objective data and recognised best practice."
And when asked whether the report covering potential spectrum releases in 2020 or 2016 was really relevant to mobile broadband business users and consumers, the spokeswoman said: "It's a fact that people are consuming more and more rich content over mobile networks, and this is happening globally.
"To meet this explosion in demand, mobile operators need more spectrum. Sufficient, internationally harmonised spectrum - and on the right scheme - is essential to ensuring the quality of service that consumers and businesses have come to expect, and rely on, from mobile networks."
She said:"This report finds that there is an even wider affect for the economy, given the difference in economic benefits of moving to an exclusive licensed access scheme."
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