Telstra is reminding customers that its aging 2G network will be switched off on 1 December 2016 around Australia, with the exception of Christmas Island. If you, or anyone you know, is using a device that still relies on 2G connectivity, you’ve only got a few days to make alternative arrangements before your service becomes inoperable.

Most devices sold in the last 15 years or so most likely support 3G of some kind, so there really shouldn’t be too many 2G only devices out there, but they are out there, particularly for prepaid services, and those who have hung onto their phones for far too long. You mightn’t have one yourself, but do your parents? Your grandparents? There’s a reasonable chance they do.

Telstra is advising customers to check whether their phones support 3G, and if they don’t, to make alternative arrangements. Best bet, especially for those less technically minded, is to pop into a Telstra shop or licensed dealer and make sure that everything is A-OK.

After 1 December 2016, 2G-only handsets will not be able to access any Telstra network, and will be unable to use Telstra for emergency dialing; they will only be able to make emergency calls while in coverage of other 2G networks.

If you’re affected, or you know someone who is, pop into a Telstra Store or call them on 1800 718 650.

Optus is following suit, closing its 2G network in April 2017, and Vodafone will be doing the same in September 2017.