O2′s social media team has worked hard to pull back the brand’s reputation after a service failure saw its signal drop for many customers. This happened on July 11th, after which a barrage of complaints arrived at O2′s doorstep. While call centre workers were forced to put thousands on hold, its Twitter team was determined to answer every single query. During what telegraph.co.uk journalist Matt Warman branded a ”social media masterclass”, in-house account moderators decided to adopt a personal tone when addressing some of O2′S more irate uses -- who were presumably tweeting through their desktops.