So my friend is giving me her old G1 since she got a new phone and it is basically sitting in her glove compartment. She has T-Mobile I have AT&T.

I am on a family plan with no data plan and my parents went so far as to put a data block on all the phones. I read a few sites and I heard from one that once the phone is unlocked it is a one time deal, if this is true this may be good for me.
A) Since my friends phone is obviously unlocked since it was hers and she used it, if I put my ATT sim card in (she's not gonna factory reset), will it work? What would I have to do

Since I dont have a data plan and my parents blocked all data (internet, not messaging) but I have Wifi, can i tell my friend before she mails me her G1 to enable wifi?
B) Since I don't plan on getting wifi anytime soon, this would be good no? Ofcourse if question A is correct that I wouldn't have to unlock it and activate it.
Ba) If question A is fail, could i still activate the phone via my wifi on the gmail account set up?

So those are all the questions I have, I would like to know what I should do when i get the phone in anycase because I would really like to use it, and i plan to use the wifi feature instead of paying for a data plan since my town has a lot of free wifi hotspots!

Let me know!!!
- Joey

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