> NSA most certainly has a backdoor there and such complete access to any Android phone.

Citation needed?

> This was common knowledge after the Snowden stuff.

Not to me, it isn't? As far as I'm aware, most of the Snowden stuff were centered around PRISM, which allowed widescale wiretapping of internet backbone, as well as agreements with big cloud providers to allow tapping into their data.

I haven't seen anything indicating that there was widespread compromise of personal computing devices at such a deep level of the root of trust. I haven't seen any indication that the NSA has a backdoor in the earlyboot CPU of any device, whether that is the Qualcomm boot processor, the Intel Management Engine or the AMD Platform Security Processor (which all have similar capabilities and hidden firmware).

If I missed anything/have links to research into these backdoors, I'd like to see them!