The methods for China Telecom to inquire about the telephone charges are as follows: dial the customer service hotline 10000, log in to the online business hall of China Telecom, download and install the mobile phone APP of China Telecom, send a short message "102" to 1000 1, and inquire at the counter or self-service terminal of China Telecom.

1. Call the customer service hotline 10000: Follow the voice prompts to check your phone bill balance and package usage.

2. Log in to China Telecom's online business hall for inquiry: Go to the personal center page and select "My Bill" or "Phone Bill Inquiry" to view the current phone bill balance and historical bill.

3. Download and install the mobile APP of China Telecom. Inquiry: After logging in, you can inquire about the phone bill balance and bill details on the homepage or personal center page.

4. Send a short message "102" to 1000 1 for inquiry: you can receive a short message reply containing the current phone bill balance.

5. Inquire at the counter or self-service terminal of China Telecom's business hall: insert your ID card or enter your mobile phone number to find the current phone bill balance.