iPhone NFC Hack For the Brave
Adding Near Field Communication chips to iPhones so far has involved ugly stickers and difficult soldering, but a new hack provides an invisible and elegant solution for those brave enough to pop off the back of their iPhone 4.
NFC capable phones allow users to simply tap their phone to one of the newer credit card terminals to make fast easy payments (a la paypass). The process, described by the guys over at Unplggd, involves ordering a smaller NFC card from your bank, taking off the iPhone 4's glass back, placing the NFC enabled card on top of the battery (reference the picture) and reattaching the glass back.
The hack obviously only allows users to use one NFC credit card unlike other phones with NFC chips built in that allow the use of multiple cards and payment accounts via software. However, it is an easy and rather harmless hack when done right.