How to activate caller ID service with China Unicom card?

Caller ID means that when someone calls you, the phone will display the other party’s phone number at the same time. You can decide whether to answer the call to avoid unnecessary interruption and trouble. According to different policies in different regions, the rates and processing methods may be different. It is recommended that you use the SMS business hall method to inquire. You can send SMS "10010" to 10010 to get the main menu of the SMS business hall, reply to the corresponding instructions, or directly send specific numbers, Chinese, and English instructions to 10010, and you can inquire and handle business through the SMS business hall. If you need to inquire For short hall instructions, you can log in to the online business hall for details/oftenInfo.html?menuId=000400010002?. If none of the above methods are able to check the activation method, you can call the local 10010 or go directly to the business hall to handle it.