Q: How do I know who’s monitoring my calls on iOS? I keep hearing beeping sounds in calls

The overwhelming probability is you are hearing normal line noise.

That said, calls are monitored or devices penetrated all the time by your phone company, the government, criminals, kids, and there is always that whackadoodle ex. Because there isn’t a good way to know if you or your device is a target, the solution is to use encryption tools.

I like both Signal or Wire for voice calls, and Wire for instant messaging. Both offer point to point military grade encryption – the gold standard. Once you start to use quality encryption tools, you can sleep a bit better at night.