[hifromLA]

How does this work with device permissions? Assuming most of these conversations are happening when there is no app in the foreground.

[dmitrygr]

This works via an SDK included in many spammy freemium games you see advertised on instagram. They refuse to work without internet and permissions to do this.

[somethingAlex]

On an iPhone, can they actually access mic input without the indicator being on?

[astrange]

No.

An insecure enough sensor implementation can pick up sound from the gyroscope though.