So I'm planning on buying an iPhone 3g or 3gs and I plan on unlocking and jailbreaking. I have a few questions for people who have already been there. 1. I plan on using t mobile's smartphone unlimited 40 dollar data package on a sim card. Will this work for an unlocked iPhone since there is no voice plan? 2. I also plan to use google voice to make unlimited sms and phone calls from said iPhone. You must be in a wifi area to do this so I intend to use a 3g manipulator to make it read the 3g as wifi. Can anyone confirm that all this will work? Is there any discrepancy in GVoice or the manipulator? 3. Will Google Voice work on a phone without voice service? Please help me make a decision as to weather or not to spend all that money. All help is much appreciated. Thank you one and all.