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<pre class="header-style">
This trigger will fire when it detects that a particular cell tower or group of cell towers is in/out of range.</pre>
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 '''
* '''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
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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]]