Deutsche Telekom and France Telecom have announced UK customers will have access to both Orange and T-Mobile signal coverage from October.
The Orange and T-Mobile merger, Everything Everywhere (E2), became the biggest mobile network operator in March with some 30 million subscribers. It will provide British customers with access to both Orange and T-Mobile networks from 5 October, according to a report by Reuters.
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Everything Everywhere chief executive, Tom Alexander, said switching between the best signals will become automatic from early 2011.
"It will be just as though the phone is roaming abroad, but in the UK," said Alexander.
Earlier this year, mobile operators, O2 and 3, and UK consumer groups called on the UK authorities to review the merger because of concerns that the new company will hold most of the radio spectrum at the 1.8GHz bandwidth. Regulatory approval was granted in March.
Everything Everywhere plans to start building a next-generation LTE mobile network next year with the first LTE phones becoming available in 2012.