... BiaforeSwitching to the Mac: The Missing Manual, Snow Leopard Edition by David PogueWikipedia: The Missing Manual by John BroughtonWindows XP Home Edition: The Missing Manual, 2nd Edition by David ... unauthorized ways). Other recent AT&T cards work, but only after you first activate them. Insert the other card—it fits only one way, with the AT&T logo facing up—and then connect the iPhone ... and thus the quality of your call audio and the likelihood of losing the connection. If there are zero bars, then the dreaded words “No service” appear here.• G or 3 Network type. The G...