keziapurrs: they didn't offer the unlimited plans for the mini unless you had an active account that was unlimited when you first purchased the ipad 1.
Paulbennet95: I haven't gone that route, I'd prefer to transfer the plan to the mini by updating my account info from one device to the next.
Tmarks: I'm sure that transferring the plan was easy in the past, but did you look at how old the information was on google? A lot of the transfers occurred in 2012, but not recently. I saw another person post having the same experience as me, 7 days ago. I went through the cellular data in the ipad settings and also through the AT&T ipad landing page. Both said that the plan is not supported on the mini. I tried this yesterday. I would prefer to not cut up my SIM card unless I had to. I could always wait for the next mini to come out with and hope to transfer the plan to that device immediately.
So for now, i have a gimped cellular mini. I'll leave the unlimited on the old ipad 1.