On Mute During a Cold Call

This has happened to me a couple times, but I use a headset for meetings and cold calling. When I am in meeting and I hit mute, it mutes on Webex and the Headset also goes on mute. This issue is, the headset stays on mute and continues to stay on mute when I start making cold calls after the Webex meeting.

This leads to the inevitable of having someone pick up a cold call and I am talking to them while on mute, which I quickly get hung up on since on their end no one is talking.

But I am curious, when you get hung up on due to technical difficulties or the background noise on your end is too loud. How do you follow up with that client? I typically wait 3 weeks since I assume they would forget, but curious how does everyone work through this since technical difficulties and dumb mistakes do happen.