Is it safe to input the verification code of Henan Mobile and Cai Yun traffic for free?

And Cai Yun Mobile are all free. A set of 6-digit random codes sent by the platform to your mobile phone for security verification.

If I didn't do it, I suggest calling local customer service. Recently, some netizens said that they always get calls from 10085. Customer service says it's the official of mobile, giving you 6 months of traffic for free, and even video members. Just report the verification code to confirm the enjoyment.

In fact, this is true, but it is also a pit. When you confirm the delivery quantity, you will become a mobile contract user by default. You can't change the set meal after that. You need this contract to expire before you can change the subscription.