SIM swap: From iphone 3G to another ATT 3rd gen non-iphone

[fuzz2008]

Would like ability to swap SIM between my ATT 3G iphone to my smaller 3rd gen non-iphone (also with ATT) . Can someone tell me what I should expect in terms of behavior of iphone and other phone eg:

1) Would my 3G iphone SIM card work on my other ATT phone (assuming this ATT phone can support 3G)
2) Does vm work in the non-iphone phone
3) would you have to reactivate iphone when you remove and replace the 3G SIM from other phone back to iphone
4) does the non-iphone "inherit" the iphone data plan?
5) Can you link the SIM to different phones from the ATT website like you can on Verizon?

 

[jwang1228]

when my iphone was dead i plucked out the sim and put it in an old phone, worked fine, not sure about vmail though
since my phone was dead, i had to do restore when i put sim back in, not sure how it would act