See recent media reports for non-technical summary:<p><a href="https://www.theguardian.com/technology/2021/oct/19/phone-firms-hit-by-suspected-chinese-hackers-lightbasin-china" rel="nofollow">https://www.theguardian.com/technology/2021/oct/19/phone-fir...</a><p><a href="https://www.reuters.com/technology/china-linked-hacking-group-accessing-calling-records-worldwide-crowdstrike-says-2021-10-19/" rel="nofollow">https://www.reuters.com/technology/china-linked-hacking-grou...</a>