I just got the new 12.9 second gen Pro. I thought I could simply slide my AT&T SIM card over from the old iPad to the new one, as that's what I did in the past. The iPad wants to "transfer" service from the old iPad to the new one and it's trying to log into my AT&T account. Obviously I want to avoid the $25 activation fee BS. I know that I can use this iPad with no SIM (except Verizon). If I'm going to get hit for the fee either way then I'd rather do this. Anyone able to shed light on this?