"iPhone" is a specific example of something that might fit the case. I could've said "Nexus 4." Or "keys." Or "pack of gum." The idea was to add a little color

"iPhone" is a specific example of something that might fit the case. I could've said "Nexus 4." Or "keys." Or "pack of gum." The idea was to add a little color by use of an example that's more easily visualized. Similar to the bits further down about a setting child on fire and farting in public. Just a little writing trick. Maybe it would've been clearer had I written, "For example, if they have an iPhone..."