ATT is apparently getting ready to launch an iPhone accessory that will turn the smartphone into an Isis-ready, NFC-enabled device. Even though the iPhone doesn’t actually have a near field communication (NFC) chip inside, which would allow users to use the device for NFC mobile payments, a leaked image provided by Engadget shows a special iPhone case – the Incipio Cashwrap – which contains a micro-NFC chip complete with a secure element that could be used for wireless payments via the Isis service. In addition to the hardware, which will reportedly retail for $70 when it launches, users interested in Isis-based mobile payments will also have to install a free application, the Isis Mobile Wallet. However, a launch date for