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.