www.WirelessFederation.com/news: Claro Nicargua has widened its validity fir prepaid cards and electronic top-ups. Cards and top-ups of NIO 1, 1.5, 3, 6, 8, 12 and 19 will now be valid for 30 days, while cards and top-ups of over NIO 20,000 are valid for 45 days.