Before moving on to how this network event is displayed in our SIM Management Platform, this is a quick explanation of the concept.
You can then check out the following articles to see it in use:
– What information is available in the last attach tool?
– How does the network detach tool work?
Cellular-enabled devices are “attached” to a radio antenna and periodically renew the attach to stay connected. This signaling events are “location updates”.
The last notification received in our system is what we display as the “last attach”.
An update is usually triggered:
– When the device is switched on (but not always in reboots though)
– When the device moves to a new area (and connects to a new cell)
– When the device connects to another bearer type (ex: from LTE to 3G)
– At regular intervals to keep the connection active, as each operator requires devices to do so to stay connected (the duration of these intervals varies from operator to operator)
Here is an example
The moving car is driving from the “red” area to the ”blue” area. While it stays in connected to cells in the Red area, there is no location updated needed. But when it leaves the range of a group of cell towers of the Red area and attaches to a new cell tower in the blue area, we’ll get a network attach update. The size of the areas varies from operator to operator, and also depends on the population density of the area.
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