4G tests reveal patchy urban coverage

Data collected by mobile coverage firm RootMetrics and shared exclusively with the BBC reveals just 40.2% of its test locations had access to the 4G network.
Outside the city centre there was no 4G coverage, according to the tests, BBC News reports.
RootMetrics also found 4G provided much faster speeds indoors, something EE's rivals had questioned when it launched.
Quick song
In test locations that had access 4G, users were getting speeds averaging 17Mbps (megabits per second), according to the survey.
Across all test locations, including those where 4G was unavailable, EE averaged download speeds of 7.6Mbps.
That is still double the average speed of the next fastest operator in the area - Vodafone - which recorded average download speeds of 3.1Mbps in previous tests.
It means that, for example, downloading a song would take less than 15-25 seconds compared with the minute or so it would take on a typical 3G network.
The survey also found:
- 31% of tests were achieving speeds of more than 10Mbps
- 9% achieved speeds of 6-10Mbps
- 18% speeds of 3-6Mbps
- 23% speeds of 1.5-3Mbps.
That left 19% achieving speeds of less than 1.5Mbps, which actually compares favourably with EE's rivals.
In previous tests, 46% of all the tests for other mobile operators performed at these low speeds, according to RootMetrics.
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