If your missed-call strategy is they can leave a voicemail, you are relying on behaviour most callers abandoned years ago.
They will not leave a message. They will ring the next number.
Building lead capture around the smallest group who leave voicemail is backwards.
Phone calls demand attention now. SMS waits. When you are under a house or driving, a text is something you can read at the next safe gap.
For the customer, SMS feels lower pressure than another phone conversation while they are stressed about water on the floor.
Example: Hi, it is your business name. Sorry I missed you. I am on a job. Reply 1 and I will call you back as soon as my hands are free.
A direct response to someone who just called your business is different from blasting a bought list. Still identify yourself, keep the first message about their enquiry, and honour STOP if you use broader SMS marketing later.
Voicemail asks busy homeowners to do extra work for your convenience. SMS meets them where they already are and keeps the lead warm until you can reply like a tradie between jobs.