Is the "Super Cordless (Tianyi Edition)" service free?

"Super Cordless (E-Surfing Edition)" is an integrated mobile and fixed-line phone service provided by China Telecom for users with Tian-Surfing and fixed-line phones. This service mainly implements functions such as simultaneous ringing of calls on Tianyi mobile phones and fixed-line phones, and SMS reception. In addition, it can also provide other enhanced service functions. To learn more about service discounts, click the "official website" below and customer service 95 will answer your questions.