Man I wish I could get my doctors to just do whatever I tell them too.
Come to Harley Street in London, just make sure to bring a few grand with you first.
As for the OP this is definitely a very strange thing and no doubt China is always up to something shady, but this is very much a "correlation is not causation" thing imo.
The dual SIM thing
@thujone mentioned is very important. Pretty much every single phone sold in China is dual SIM, previously the only exception was iPhones but since the iPhone XS the Chinese models contain two SIM slots. Dual SIM phones have been the norm in China and other Asian markets long before they began selling them to the West fairly recently. I mean 10 years ago, basically every phone in China was still dual SIM. Big companies like Samsung made dual SIM phones purely for those markets, the biggest of which by far is China, and are now beginning to sell them across the world as Samsung's Chinese competitors have popularised them in other countries too (my Samsung Galaxy is dual SIM).
This is alien to most American consumers because the carriers control the market and want to sell you a locked down phone so of course they do not want you using two SIMs, but in most of the world it is the opposite and unlocked phones rather than phones purchased on a subsidised contract are the norm.
My point in saying this is that one SIM does not equal one person in China. It is a safer assumption that each person has two SIM cards. So let's say we assume everyone in these figures died because 20 million phone users dropped off. The true number is likely to be closer to 10 million.
Then you have the businesspeople who travel around a lot. Someone who lives in the US but travels to China for business could have either a dual SIM phone or two separate phones, one with a US SIM and one with a Chinese SIM. Well they won't have been using that Chinese SIM in the past few months would they? And odds are they also use a SIM without minimum spend because obviously they are probably not in China every month.
To be clear I am not saying there's definitely nothing fishy going on. It is the CCP we're talking about, they absolutely have been lying about their COVID numbers and we know they covered it up and silenced doctors (some of whom mysteriously died) for about a month before informing the WHO. The WHO then told everyone that COVID cannot be passed through human contact despite evidence to the contrary.
The fact the CCP suddenly want to "simplify phone plans" right after this data was leaked is very suspicious too. Clearly they are trying to hide something. I'd be interested to look at the data for myself though.
P.S. Can't help but find it amusing the Chinese guy they interview here calls it the "CCP virus" with no problem, but in the West anyone calling it the "Wuhan virus" is apparently an evil racist. The 50 Cent Party have done a good job on that one.