The T-Mobile Voice Plus is a new service that T-Mobile is trying out right now, the beta began recently and only the T-Mobile G1 users are capable of being selected in the beta. There is no release date announced for this service or if it will ever be available because this is still in the early stages. Something important to note is this beta will require you to update your G1’s software, and doing so will erase all the settings and user data that's on your G1. Therefore, make sure you are backing up your data. If something does go wrong on the update, they have instructed not to contact customer support, there are specific voice plus beta discussion boards to help you out.
Here is a list of features from the T-Mobile Voice Plus Beta:
-          Call Divert: Carve out a little peace and quiet by sending selected numbers straight to voicemail without ringing your phone.
-          Call Defer: Let callers know you’re busy and schedule a convenient time for you to call them back. Send them a text message that acknowledges their call and that you will respond at a later time.
-          Visual Voicemail: Easily manage your voicemail! View a list of who left a voicemail, with the time of the message and its length. Choose which to listen to now and which to review later.
-          City ID: Get more information about the calls you receive. The city and state information of incoming calls is displayed.
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Looks and sounds nice.
NIce,too bad I dont have t mobile
I would like to be in teh beta!
Something like multi tasking I believe.
Their definition of visual voice mail isnt to visual.
beta for this?
They need more stuff than this
Dang this is no that great or I dont care for it.I dont get alot of voice mails anyways.
lol this does have a lot of cool features, too bad I don't have a G1 to try it out since I wasn't a fan of that phone.