Joke Collection Website - Public benefit messages - How to check the flow direction of electrical signals?

How to check the flow direction of electrical signals?

Telecom cards can query traffic in the following four ways:

1. Edit SMS. Edit the SMS code 100 1 send to query the traffic.

2. Customer service telephone: call the telecom customer service telephone number 10000, and press the voice prompt button to inquire.

3. Telecom APP, which can download the online business hall of China Telecom in the application market; After logging in, you can query in "Traffic Details".

4. WeChat official account, search for "China Telecom" in WeChat, select the official WeChat account of "China Telecom" in the search results, click the "I want to query" option in "Service", and log in the electric signal to query the traffic.

Usually, the most you use is to edit short messages and queries through WeChat official account. If you use the mobile phone card of Telecom, you can query the traffic through the above methods.