If you buy your phone from a carrier. If you buy directly from a vendor I don't see how they (carriers) would be able to inject it. Radio firmware however is, as I understand it, a completely different thing...
Radio firmware has been a misnomer for a very long time, because the so-called baseband processor it runs on has access to and can control much more than just the radio.
As far as I know, radio firmware on current phone SoCs has full, unlimited read/write access to all of the available RAM and can preempt and modify any process running on the application processor, so any indications regarding authenticity of any software running on the application processor - as provided by software running on that same processor - are effectively moot.
TL;DR: He who controls the radio (firmware) pwns your phone.
acka|2 years ago
TL;DR: He who controls the radio (firmware) pwns your phone.
tiberious726|2 years ago