Part of the reason not to use Huawei (or Chinese origin) phones?

https:// www.intelligence.senate.gov/sites/default/files/hearings/95mkultra.pdf

Read very carefully.

Unreleased [CLAS-HIGHEST]:

Ability to use frequencies [incoming sig]/modify/code/program over 'x' period [designate] mobile phone to 'control' target subject.

OP conducted/ORIG outside of US.