My iphone's visual voice mail was working perfectly, and then stopped. i didn't change anything and this is an "untampered" iphone, so only the original components. how do i get visual voice mail back?
It took 2 weeks for AT&T to figure this out. Essentially, you have to be on the Edge network for the Visual Voicemail to work. I was on wi-fi, and was therefore the VM was not working. The easy fix for me: press and hold the home button (round button at bottom) and the power button simultaneously. then slide the bar over that appears on the screen. this will get you back on the Edge network, and problem solved. you will know you are on the Edge when the "E" appears at the top near your service bars. hope this solves your problem.
If you delete but do not clear your deleted messages, you can run into this problem. As far as I can determine, it is a size based thing - you may find the first sign of problems is that small messages may appear but not big ones. Soon, however, all messages won't be automatically downloaded (but they will be waiting on the server).
The solution is simple - delete, permanently, all your deleted messages (at the bottom of the visual voice mail screen, choose deleted messages, then choose permanently delete).
While Apple has done a positively stunning job when they created the iPhone, there is a glitch here - there should be a warning that there is no space and messages can't be downloaded; unfortunately, there isn't.
It appears to be the case that deleted messages are automatically permanently deleted by the iPhone after some period of time (appears to be 30 days), else everybody would be running into this.
So the problem only occurs if you have a lot of messages in the last month; it has happened twice to me, and each time I had around 75 deleted messages.
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it is a feature that provided by the carrier, you can ask them to disable it or just type in incorrect password in settings - phone and change voicemail password and phone will stop connecting to the carriers server.
This procedure allows your iPhone to ring for longer or shorter periods
than the default setting of 20 seconds before voicemail answers. ***
Attempt at your own risk but if you pay attention to the keys you input
and follow the directions you should have no problems.
1. On your phone, dial *#61# and click Call
The screen will display:
Setting Interrogation Succeeded Voice Call
Forwarding When Unanswered Forwards to
Write down the xxxYYYzzz number (including +1) - this is the number to
3. In order to make the
+ appear on the keypad in the next step you'll have to hold Zero down
for a few seconds, then it will become a Plus (+). Dial
**61*+1xxxYYYzzzz**30# and hit Call. +1xxxYYYzzzz is the number you
wrote down previously, 30 is the delay in seconds. The delay can be set
in 5 second increments, 30 is maximum.
Dial *#61# to verify that the new settings are active.
5. Verify working voice mail.
If you find you or your contacts are not being forwarded to
your voice mail you have incorrectly altered your voice mail forward
To find out what it is and try
Dial ##002# and send. This will
reset that forward number to factory defaults.
By then Dialing *#61# you will again display the your
current (default) voice mail forwarding number.
Return to step  and continue.
*** Use this tutorial at your own risk ***...and if you have
the time you can always give AT&T a call to have them change the
number of rings on an incoming call before Visual Voicemail kicks in. I
was able to quickly change the duration on my own, using these
diagnostic iPhone GSM codes. The default time duration before Visual
Voicemail intercepts the call is set by AT&T to 20 seconds. You will
be able to add another 10 seconds yourself, but if you want your
callers to wait more than 30 seconds before voicemail picks up then
you'll need to contact AT&T technical support - they can change the
duration to 45 seconds upon request.