> In February 2016, 30% of the network of the largest mobile operator in Norway, Telenor, became unstable due to "Unusual SS7 signaling from another European op

> In February 2016, 30% of the network of the largest mobile operator in Norway, Telenor, became unstable due to "Unusual SS7 signaling from another European operator". Supposedly this happened because the other telco had hired a pentester...