First one looks a little sketch, second one is more well known I think. Here's an open-source one: Android IMSI-Catcher Detector (https://cellularprivacy.github

First one looks a little sketch, second one is more well known I think. Here's an open-source one: Android IMSI-Catcher Detector (https://cellularprivacy.github.io/Android-IMSI-Catcher-Detector/ https://cellularprivacy.github.io/Android-IMSI-Catcher-Detec...) Here's a list of apps to get cell data: http://wiki.opencellid.org/wiki/Data_sources http://wiki.opencellid.org/wiki/Data_sources If you're using a CDMA phone and are still concerned, you can try modifying your own PRL and blocking carrier updates.