How do you handle incoming requests while working?

I was talking to an electrician friend who mentioned that the reason it’s hard to reach an electrician during the day is… well, because they’re actually working! It’s kinda obvious in hindsight, but it got me thinking - how big of a challenge is this for people here?

When you’re on a job, how do you handle calls, texts, and quote requests? Do you try to answer when you can, let them go to voicemail, or text back later? Do you use a call / text answering service? Also, how important are quick responses to customers?

Just curious how you personally deal with this. Would love to hear your thoughts!