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Re:How to Build Your Own Rogue GSM BTS for Fun and Profit by peterwwillis on Saturday April 02, 2016 @07:24PM (#11414080)
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-Detec...)

Here's a list of apps to get cell data: 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.

Re:How to Build Your Own Rogue GSM BTS for Fun and Profit by Aloha on Saturday April 02, 2016 @08:37PM (#11414307)
CDMA is largely immune to this, largely owing to the lack of implementations of a CDMA BSM