
AT+COPS=0 in a FXT009 may end up making the device stuck in a weird state in which it only replies "+CME ERROR: 515" to every AT command. So try to avoid this command whenever possible.
AT+COPS=0 in a FXT009 may end up making the device stuck in a weird state in which it only replies "+CME ERROR: 515" to every AT command. So try to avoid this command whenever possible.