Just buy an iPhone case, or get a bit of duct tape and cover a gap on the strip of metal that runs along the outside edge of the phone, which also serves as an antenna, Gikas writes.
Since Indian ATMs don't require the double identification of RFID smart card and magnetic strip, just the strip, they were able to manage quite a bit of cash before a vigilant security guard spotted them making withdrawls from multiple cards in succession.
They also, in a smart bit of PR, launched a browser plug-in for Twitter users who wanted to strip out any mention of SXSW from their social media stream during March this year.