> For the complete documentation index, see [llms.txt](https://gsm.learn-telecom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gsm.learn-telecom.com/messages-for-mobility-management/registration-messages/imsi-detach-indication.md).

# IMSI DETACH INDICATION

### IMSI Detach Indication

An IMSI Detach Indication is a signal sent by a mobile device to a network to indicate that the device is disconnecting and going offline. This helps the network update its records and manage resources efficiently.