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this post was submitted on 10 Mar 2026
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Privacy
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That's correct, but the XMPP portion of this communication chain is just your device to the JMP service. Any messages sent or received to another phone number are delivered via SMS/MMS. As a result, those messages can be read by unrelated 3rd parties. I assume something similar is possible for voice calls as well (or at the very least the call start/stop times and the other number on the call can be determined).
Essentially this just shifts trust from a mobile phone carrier to JMP. However, I understand that it may be more challenging to hack a VOIP number than perform a SIM swap attack. Another benefit of JMP for privacy is the more challenging tracking of location for a JMP phone number.
I'm not saying that using JMP is bad. I am saying if you need a secure and private way of messaging someone then this is not the best solution.