When conducting business (e.g., on business cards or stationery, etc.), it has become common practice to write the number in the form: +61 (0) 7 3333 3333, on the mistaken assumption that all countries use 0 as the trunk prefix.
When conducting business (e.g., on business cards or stationery, etc.), that number should be written as +61 7 3333 3333 and should include only the digits that must be dialed from abroad. It has mistakenly become common practice to write the number in the form: +61 (0) 7 3333 3333, on the assumption that all countries use 0 as the trunk prefix.