im sure there's a way.
im thinking of going to the sql(using phpmyadmin)
and drop the following lines
UPDATE clients
SET phone = CONCAT('1 (', SUBSTRING(phone, 1, 3), ') ', SUBSTRING(phone, 4, 3), '-', SUBSTRING(phone, 7))
WHERE phone NOT LIKE '1 (%';
at least that's what master "copilot" recommended 🙂
ill check on that later on today.