GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd' on object at path /org/freedesktop/ModemManager1/Modem/2
modem manager GUI work properly in ubuntu 13.10 after upgrade to ubuntu 14.04 Can't send USSD.I have a huawei E158 usb router and ASUS N53T laptop, Help me to solve this problem.
when i install ubuntu resevied this message! but i have latest bios
Try updating the firmware. It looks like the latest for your e158 is 11.609.18.01.158 as of this date available here: http://huaweifirmwares.com/download/e158-firmware-update_11-609-18-01-158/. Failing that I've found that contacting the manufacturer is often helpful.
http://www.huawei.com/ilink/us/about-huawei/contact-us/index.htm
Problem Solved new Modem Manager Version 0.017(Module Backend) Change Module Backend