Ever since I moved to O2, and ported my existing number in, I've been regularly getting weird voicemails. The odd thing is that voicemail is off, I have set a PIN, am now using Call Alert, but I am still getting these phantom voicemails even when my phone is on!
The content of these messages ranges from apparently random electronic noise, sometimes up to 4 minutes long, to automated messages such as "you are connected to the audio test interface" and "the person you are calling is unable to take the call".
Any ideas???