The number can be connected normally, but I have been contacted several times but received complaints. What is the problem?
The number can be connected, text messages can be received, and there are even people who reply when contacted for the first time, but after following up several times in a row, they are marked as harassment or complained. When this happens, it is usually not a problem with the validity of the number, but rather that the source of contact information, contact frequency, and rejection records are not handled properly.