How to check the free phone bill and internet traffic through GSM?

Methods for checking global toll-free telephone charges and Internet traffic;

1. Dial "10086" directly with your mobile phone and follow the voice prompts.

2. When you hear the prompt "Please press 1 for SMS reception", press 1 to complete the inquiry of telephone charges and internet traffic.

3. Next, as long as you wait patiently for a while, the mobile phone will receive phone bills and Internet traffic messages.