1. A computer implemented method for notifying a set of devices selected from a plurality of devices in a cellular communications network, the method comprising: receiving, at a server, data indicative of a notification request defining a geographic area; determining, at the server, a location accuracy for notifying devices within or proximate to the geographic area as a first location accuracy or a second location accuracy, wherein an accuracy of the first location accuracy is higher than an accuracy of the second location accuracy; if it is determined that the location accuracy is the first location accuracy, selecting, at the server, a first set of devices that are located within the geographic area and then using the server to notify the first set of devices; if it is determined that the location accuracy is the second location accuracy, selecting, at the server, a second set of devices that are located within cell sectors which overlap the geographic area and then using the server to notify the second set of devices.