AT+CUSD Not Working on modem Huawei e3131a
问题 I am trying to send at commands to get balance on huawei e3131a modem but i always receive "Ok" as answer no matter the configuration i use (GSM, IRA, UCS2). I also tried to change the operator code ( #123# ) to many formats like Hex PDU Simple String but no way to get the balance. Here is the command i sent : AT+CUSD=1,"#123#",15 . Thanks in advance for the help. NB: I am using Putty to send commands. 回答1: I finally found the method to send USSD At commands. Some 3G Modem doesn't support