AT commands to get internet data balance

Technical Subjects
1

We have the following Quectel Modems.

  1. RM500Q
  2. RM530N-GL
  3. RM502Q-AE
  4. EC25A
  5. EC20

Would like to know the AT commands to get the internet data balance to alert the user to refill/recharge the network data plans.

2

The mechanism is carrier dependent.

Some provide balance info through an interactive USSD session. In that case, the AT command is +CUSD.

Some allow balance queries via SMS. The relevant AT command is +CMGS (plus others, like +CMGR or +CMGL).

Others do neither, and require logging in via a URL using a user ID and password.

3

Thanks @snowgum for your quick response.