My trusty rw6828 SmartPhone has been sent off to get fixed, as it is suffering from the not unknown problem that the audio isn't working.
It works if you have the earplugs connected, but the only sound it makes otherwise is that the phone rings when someone is calling, but otherwise there is no sound at all.
I tried jiggling the jack to no avail.
I had to include a copy of the original invoice so our IT department can arrange for it to be serviced, and it turns out it will be a year next week since I first got it. This means it should just sneak in under warranty!