Is the mobile phone binding Sina Weibo charging?

I am a person who is more likely to forget things. I often forget some passwords. After I heard that my mobile phone is bound to Sina Weibo, I can retrieve my password through SMS. Is the mobile phone bound to Sina Weibo?

A: No charge, it is free. No call charges, but if you go online with mobile traffic, you will receive traffic charges. For example, if you use your mobile phone to send Weibo, you will go through the data traffic. Of course, if your mobile phone uses its own wireless router to access the Internet, then it is not Charges. It’s a bit messy, in one sentence, there’s no charge for mobile phone binding to Weibo. Mobile Internet access costs the same as before.