Snowdonia: Mobile phone navigation warning after rescue 11 August 2013 Last updated at 12:21 Climbers in Snowdonia have been urged not to rely on mobile phones for navigation after rescuers spent most of the night searching for three men. The trio, aged in their 20s and from the London area, were climbing the 14 peaks which are all above 3,000ft (914m). But as darkness fell and the weather deteriorated on their final peak, Foel Fras, they became lost. They were found at dawn on Sunday but had limited walking kit, said rescuers. They were brought down to Abergwyngregyn and given warm clothing, food and drinks. Chris Lloyd of Ogwen Valley Mountain Rescue Team said the men had no mountain walking experience.