I just found out I had 50 new messages on my phone to which not one was sent to me to notify me that it had arrived. Any ideas why this is? Every other phone I have ever had has some sort of icon to indicate a new message?
I am sure someone will come out with a detailed techincal explanation, but until then.....
It happened to me once, I took out my battery and put in back in. Worked a treat!
If you're talking about voicemail messages, you might want to cal your voicemail and check to see if voicemail notification is turned on in your options. I don't know how Orange voicemail works, but it's the only thing I can think of right now.