ATT prepaid plans do not offer any international coverage. IOW, you won't be connecting to any of ATT's roaming partners in Spain, even just to receive a caller ID display. You would need a post-paid plan for that to work as you've concocted it . Something like Grandcentral/IPKall/Gizmo5, even if you already have it setup, won't work since they don't forward to international numbers.
Hello... I am moving to Spain for 2 years but I don't want to lose my US cellular phone number.
I will get a new cell phone in Spain and cellular provider there, but I want to keep my US number and have the phone ring when called (so I know I have a call) but I will not answer. I will see their caller ID then phone them back via Skype or from my Spain cell phone.
I am looking at Cingular Pay as you Go plan... Other recommendations?