AT&T's micro SIM cards rolling out in advance of tomorrow's 3G-capable iPads may be designed to help users switch to the next iPhone or other future smartphones, those who received the cards early have said today. The cutout actually puts the SIM in a full-size format and leaves the micro SIM size as a subset of that card. As such, a user could use the regular SIM layout and then punch out the micro SIM if they either need an iPad or another device that needs the smaller standard.
