AT command – USSD
The format of the command is AT+CUSD=[<n>[,<str>[,<dcs>]]], and the second parameter, <str>, is a string that should be enclosed in double quotes. E.g. AT+CUSD=1,”*555*87*1234#” AT+CUSD=1,”1″ See 27.007 for more details about AT+CUSD and V.250 for general AT command handling. If your phone gives an OK response to AT+CUSD=1,1 that is really bad, it should have … Read more