London SE3 - we used to have a good reliable O2 phone service but for the past 12 months and more it has become worse to the point that to make a call we need to leave the house to find a signal & so do our neighbours. Trying to contact O2 is a waste of time but we do get helpful texts saying that O2 improving the network in our area. To date we haven't seen any such thing & the joke is that from our bedroom window we look straight at the O2 Arena - nice Logo but we have no service. We have no issues with the cost of the contact but we are paying for something we don't have at home - like a signal, with a mobile device that we cannot use to make calls !