What is what does message blocking is active mean on iphone?

"Message blocking is active" on an iPhone means that the user's cellular carrier has blocked the ability to send or receive text messages. This can be due to various reasons such as outstanding payments, account restrictions, or technical issues with the carrier's network.

When this message appears on an iPhone, the user will not be able to send or receive text messages until the issue is resolved. They may need to contact their cellular carrier to inquire about the reason for the message blocking and take the necessary steps to rectify the problem.

It is important to address message blocking as soon as possible, as it can impact the user's ability to communicate with others effectively.