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This trigger will fire when you enter or exit an area based on the cell towers that can be detected by your device.
This trigger will fire when it detects that a particular cell tower or group of cell towers is in/out of range. This is a low-accuracy location method useful for identifying presence in a general area such as a town or city, as cell tower coverage typically spans many kilometers.
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''' Options '''
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* '''Enter Cell Area''' - The trigger fires when at least one cell tower from the selected group becomes detectable, confirming you are within the group's coverage zone.
* '''Leave Cell Area''' - The trigger fires when no cell towers from the selected group are detected, confirming you have moved outside the coverage area.
After selecting enter/leave, you will be taken to the Cell Tower List screen where you can:
* Create a new cell tower group by scanning visible towers at your current location
* Select an existing cell tower group
''' Cell Tower Groups '''
Cell tower groups are collections of cell tower IDs that define a geographic area. To create a group:
1. Go to the location you want to define
2. Add a new cell tower group and scan the visible towers
3. Give the group a meaningful name
The trigger compares currently visible cell towers against the saved group to determine whether you are within or outside the coverage area.
''' Examples '''
Example 1: Turn on WiFi when arriving at home area
<pre class="trigger-style">Triggers
Cell Tower Change [Enter Cell Area: Home]</pre>
<pre class="action-style">Actions
WiFi On</pre>
Example 2: Silent mode when leaving home city
<pre class="trigger-style">Triggers
Cell Tower Change [Leave Cell Area: Home City]</pre>
<pre class="action-style">Actions
Set Ringer Mode: Silent</pre>
''' Notes '''
* Cell tower-based location is less accurate than GPS but uses significantly less battery power.
* The trigger polls cell tower information at regular intervals. You can configure the update rate in MacroDroid Settings.
* Setting the update interval to 0 uses a 30-second interval.
* The trigger listens for real-time cell location changes when the device is awake.
* On Android 8.1+, location services must be enabled for this trigger to work.
* The trigger requires the SCHEDULE_EXACT_ALARM permission on Android 12+ for reliable timing.
''' Permissions Required '''
* ACCESS_FINE_LOCATION
* ACCESS_COARSE_LOCATION
* READ_PHONE_STATE
''' See Also '''
* [[Constraint:_Cell_Towers|Cell Tower Constraint]]
* [[Trigger:_Geofence_Trigger|Geofence Trigger]]
* [[Trigger:_Location_Trigger|Location Trigger]]