Not sure if this is a thing on other android /iOS devices,but this setting is very much appreciated on graphrneOS

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And you can set your network to ONLY use LTE and check the towers your phone is using by using the hidden testing setting on Android by entering

*#*#4636#*#*

on your phones default dialer.

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And this app for android is particularly useful:

f-droid.org/packages/com.craxiom.networksurvey

Scans cell towers, WiFi signals, Bluetooth, and notifies if a new tower is found.