Apple’s first SIM just had its first arrow slung at it: AT&T has locked down the company’s new Apple-Made SIM cards in its newest line of iPads. Typically SIMs, the teensy ID cards that allow a device to be used on a cellular network, come from the carriers. But Apple now makes its own, presumably so that the devices can be used on any network.See also: What's Apple Going To Do With All Its Loose Ends?However, customers purchasing the iPad Air 2 or the iPad mini 3, the first to carry these SIM cards, won't have that freedom if they buy from AT&T.