The US government agencies say that China-linked threat actors have hacked into telecom providers to steal call records and data and to spy on individuals.
“Specifically, we have identified that PRC-affiliated actors have compromised networks at multiple telecommunications companies to enable the theft of customer call records data, the compromise of private communications”” the alert reads.
https://www.securityweek.com/cisa-fbi-confirm-china-hacked-telecoms-providers-for-spying/
Based on mobile phone texts, calls, etc no longer bineg “private”, CST recommends a highly respected messaging app called Signal. It is 100% free (a 501c3 nonprofit) organization aimed and founded in privacy. You can use this messaging app to text and make phone calls with industry strength cryptography, an no trackers.
https://signal.org
“State-of-the-art end-to-end encryption (powered by the open source Signal Protocol) keeps your conversations secure. We can't read your messages or listen to your calls, and no one else can either. Privacy isn’t an optional mode — it’s just the way that Signal works. Every message, every call, every time”