If you're on EE in the UK, you could be seeing a major LTE speed boost coming your way. Alex Dobie of Android Central explains:

The new, faster speeds are enabled by allocating more of EE's spectrum to its LTE network — it's now using 2x20MHz of 1800MHz spectrum instead of 2x10MHz. This brings theoretical transfer rates of up to 150Mbps, with real world speeds averaging around 30-40Mbps. In practice we've seen download speeds regularly hit 40-50Mbps in London and Manchester, with throughput reaching highs of 78-79Mbps in some areas.

Birmingham, Bristol, Cardiff, Derby, Edinburgh, Glasgow, Leeds, Liverpool, London, Manchester, Nottingham and Sheffield, start your speed tests!

(I've gotten 50Mbps down at the local coffee shop, how you doing?)

Source: Android Central