Is there a charge for sending text messages by Yixin?

"There is no charge for using any function in the E-mail client, but users can choose to invite their friends to use E-mail through the charged SMS that comes with their mobile phones. The Internet traffic fee generated when using E-mail is charged by the mobile phone network operator, and it is recommended to use it in conjunction with the Internet traffic package. " For more service offers, click on the "official website" customer service 222 below to answer your questions.