AT&T: RAZR V3 to iPhone (1st Gen.) SIM Card swap w/o data plan?

[(Name Here)]

I recently upgraded to the iPhone 3G S, and I want to give my old iPhone to my mom. She never uses the internet, so is there any way how to swap SIM cards with her RAZR with the iPhone without having to pay the extra $20?

Thanks!

[STEVIELOLO]

Unlock it With red snow or pwnage tool

[(Name Here)]

I have the iPhone jailbroken right now. If I unlock it, do I have to jailbreak again?

Also, will the RAZR SIM card work?

[mikerlx]

Hi, Cydia means jailbreak and unlock means unlock both option on RedSn0w. Simply a mouseclick and why not check both boxes even if your on ATT just for ease of use.

[(Name Here)]

Sorry, what I meant to say was will I lose all the current mods if I unlock the iPhone.