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EE's 4G LTE network is now live in 11 UK cities, promising users download and upload speeds five times faster than 3G, according to the company. But can it deliver on its promises - and are those speeds possible indoors as well as out?
To try and get a fair representation of speeds in different parts of the capital, I visited a number of stations in the north, south, east and west of the city.
To carry out the test I used a Samsung Series 5 Slate running Windows 8, a Huawei E589 4G Mobile Wi-Fi unit, and the website Speedtest.net.
Over the course of the day I visited Shepherd's Bush, Oxford Circus, Tech City, Canary Wharf, Clapham North and Newington Green. You can click on any of the markers below for a breakdown of the speeds, or click on the link below for a full-size version of the map.
View London EE 4G reception and speeds in a larger map
Check out the following pages for a first-hand take on how the new network performed.
If you are an EE 4G customer and live in London, get in touch with your speed test results and we'll add it to the map.