(Telecompaper) Telefonica UK has confirmed that the O2 4G mobile network will be be switched on in London, Leeds and Bradford on 29 August, making it the second LTE operator after EE. The network will initially reach up to five million people at launch, and O2 plans to make 4G available to an additional two million people per month going forward. The 4G network will be live in 13 cities by end-2013. SIM only and Pay Monthly tariffs, including O2 Refresh, will be available from launch from GBP 26 a month. Pay&Go tariffs for LTE access will launch in the coming months. Business customers will also be offered tariffs for tablets and mobile broadband from launch and Mobile Wifi (Pop Up Office) in the coming weeks.