Many of the self-scan checkouts, definitely those at Tesco, struggle to read barcodes from phone screens as the glass is too reflective. I have my Clubcard barcode stored on my Galaxy Note, but it can only be read by the handheld guns at the manned checkouts.
Hence the "So to find out, I'm teaming up with someone with an iPhone" at the end of the text. Seeing the number of complaints saying he is going to rob, I guess nobody read the whole text?
