The Netherlands tests its air-raid sirens once a month, every first Monday at noon, to keep the public aware of the system. There are about 4,200 sirens placed all across the country.[16] In March 2015 it was announced that due to high maintenance costs the sirens will be taken out of service by the end of 2017.[17] The government is implementing a cell-broadcast system, NL-Alert, to replace the sirens. During initial tests of the cell-broadcast alert: 12% received the alert, 22% configured their phone to receive it, but did not, 26% did not configure their cellphone and 40% did not have a phone or mobile-operator supporting the system.