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Are there tools available to monitor if I receive a silent SMS?

I think it's safe to assume that all popular brands of phone are compromised and exploitable with these SMS PDUs. If I buy a Seeed Rephone open-source DIY kit and use it as a GSM-to-WiFi modem, will that be any more secure? I guess that reverse triangulation from cell towers is still possible to determine my location.

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https://www.bladox.com/products.php?lang=cz, see "Turbo SIM" (the others' pictures may confuse the idea).

It's an ATMega128 which sits between the phone and SIM, intercepting all comms. It runs C code and provides an API which lets you read, manipulate or send any kind of SMS. Specifically, you can edit or prevent messages or any kind of SMS from reaching the SIM and thus your mobile operator's "secret" SIM apps.

I used it at a previous job and can vouch for it.

Doesn't look like they have versions for smaller SIMs, however.

While not directly silent SMS, SnoopSnitch can check mobile network security and monitor for dome of the message types - https://f-droid.org/app/de.srlabs.snoopsnitch

Interesting. Requires root and a Qualcomm chipset, compatible device list here: https://opensource.srlabs.de/projects/snoopsnitch/wiki/Devic...

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