Affected Three customers have mainly been tweeting about issues receiving and placing calls today. Messaging the @ThreeUKSupport account, one tweeted: "Myself, my girlfriend and my mother are all having an issue where are numbers are not being recognised for a call, never connecting and can't call on a landline. "We're all on 3 on separate contracts and all paid up. Is there an outage going on?" Three network introduce their new mobile app While another posted: "@ThreeUKSupport My calls either won’t connect, or if they do, none of the number options are recognised. I’m trying to call my son’s GP and have tried from mine and my brother in law’s phones (both with 3). Our data also doesn’t seem to be working."