$dbus-send --system --print-reply --dest=org.ofono /ril_0 org.ofono.ConnectionManager.GetProperties

method return sender=:1.9 -> dest=:1.541 reply_serial=2
   array [
      dict entry(
         string "Attached"
         variant             boolean true
      )
      dict entry(
         string "Bearer"
         variant             string "none"
      )
      dict entry(
         string "RoamingAllowed"
         variant             boolean false
      )
      dict entry(
         string "Powered"
         variant             boolean true
      )
      dict entry(
         string "Suspended"
         variant             boolean false
      )
   ]