The other day my phone (a Samsung S5, no, not the edge) started beeping at times when I was holding it. This began expectantly, and after a week of these obscure notifications, I tracked it down to when the phone was being placed next to my wallet. An App that I recently installed turned on the Near Field Communication (NFC) features on my phone, which ment that it was now registering my credit cards when they got close enough, through the outside of my wallet.

After turning of the NFC feature on the phone, I had a quick google on ‘RFID Card Shield’ and came up with a card sleeve (see picture) that works quite effectively.

The sleeve is made up of several layers of aluminium foil, for strength and cut to size, and wrapped in gaffatape.