I had an iPhone 3GS. I brought it to a small AT&T store where they removed the SIM card from the top of my iPhone and inserted into my Note (I received a German version of the Note from amazon).
We couldn't get data on my Note (phone worked fine) using the APN settings I had found on the internet, so the AT&T guy tried to switch my unlimited data plan to a tablet. That didn't work either and he switched me back to a smartphone.
Finally, I went home and tried a different set of APN settings that I had found in a review of the Galaxy Note at amazon (cingular settings). I then did a factory reset of the phone. It WORKED!
I have posted my up and down speeds elsewhere on this forum. I was told by this AT&T guy that because my phone is unlocked, I will not get LTE speeds with it (even tho it is capable). I am getting 3g and HSPA. I will have to investigate whether this is true.
I LOVE the phone. It is zippy and elegant. The stylus is awesome, too.
I hope you got your issue worked out.
So I bought a Note, but need to know the "procedure" or best way to switch my iphone 4 to Note using ATT service?
I'm on the "Data Unlimited for iPhone" data plan. Is this the right plan or is there a different one I need?
Should I just go into the Att store and tell them I need the sim card and tell them I'm on a smartphone? Or should I just call and tell them something?