Is the call claiming to be from 10086 Foreign Service true? The phone number starts with 134

I also received a call just now, but he could tell me my original data plan, and also told me to switch to the 38 package, and the verification code was indeed sent by 10086 Foshan Mobile, in the same conversation. Yes, so I said, it should be fine! I just asked 10086 human service, she said there is no problem and it is not a scam