Send text messages to Hong Kong people. How to send?

Press 00852 and add a phone number to make a call. Of course, it's the same as making a long-distance call to the mainland. It is very cheap to add 12593 or 179 165438 before 00852. You can send a message by directly adding 00852 before the number. But I remind you to be careful when making friends. There are also bad people in Hong Kong.