I have a aastra 390 phone, the message light keeps flashing when no messages

Call your phone from a different one and leave yourself a message Then go into your phone and clear everything that you hear . Do this by ..... As soon as the message starts hit 3 3 7 then go on the next voice and continue till all messages are done no matter what the message is. This will clear the light. Hope it helps

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.