Hello, I am using Telit HE910 modem, After sending AT+CMER=3,0,0,2 I always got "sim card is busy". The followoing is the part of log: ofonod[446]: Aux: > AT+CMER=3,0,0,2\r ofonod[446]: Aux: < \r\n+CME ERROR: 14\r\n ofonod[446]: +CMER not supported by this modem. If this is an error please submit patches to support this hardware My question is : How important is this command.? I mean what the worst consequence will be if I just ignore this error message, Thanks! Mingli