I try to activate call waiting for telit le910, but when I sent this commands, I got error response. If I insert the sim card into my phone and dial *43# it is activeted. Do you have any suggestions for solution? How can I activate this feature with AT commands?
at+ccwa=1,1,7 +CME ERROR: operation not supported
at+ccwa=1,1,1 +CME ERROR: operation not supported