Re: Of course...
The issue with "technology" and the internet, is that data mining is BIG business and hence any way of collecting data means it can be monetised.
And given that Apple have pushed the iPhone into peoples way of life, and the same with Google and Android, has meant that these two companies alone are sucking up data left, right and centre.
And the claims that the Chinese company Huawei are doing the same thing should be no surprise to any one.
The trouble is that the US has allowed Apple/Google to do this and there is no significant alternative (whereas in the past Microsoft were forced to make Internet Explorer as option with early versions of Windows).
(Even "open source" bloat-free versions of Android cannot be easily installed, and even the CyanogenMod OS is now dead leaving just LineageOS, and assuming your mobile is supported).
And many mobiles are "locked" by phone providers, preventing any way of un-installing certain apps, which may be running in the background.