bout to buy a used G1 from someone who has data plan if i unlock it will i have to sign up with gmail on phone?

Carmelina Enoch: you can unlock the G1 here: http://www.gsmunlocklabs.com/unlock-tmobile-androi...

Tana Dumoulin: If you unlock the G1, it works like regular PDAs, you can either use it with or without the G1 date plan. And yes, once you unlock the G1 you just insert your SIM Card, it will work automatically with your originally date plan from your old phone.

Ginny Trickett: wifi won't artwork for telephone calls or texting till you get a texting app. and you may consistently would desire to have wifi to apply it, yet you may desire to get one and only use wifi for apps and stuff.