Signal is not the answer. Signal’s backend is essentially closed-source, and to my knowledge none of their binaries are reproducible with the code available. If you really want privacy and security in E2EE, you want somethjng that’s completely open-source (front and backend), and can be self-hosted entirely. Matrix is this.

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This is why I recommended a Shield for which there is an actively maintained LineageOS. Yes, it’s an investment, but well worth it nowadays.

1. Invest in an Nvidia Shield
2. Install LineageOS Android TV

I have two of these in the household, one of the best tech investments I made. No more homescreen ads.