Bob is a cheapskate, so instead of looking in official outlets for an iPhone, he looks at flea markets and shady retailers.
Copyright laws are not well-enforced in the area.
Reversed Idiom: A real product designed based on a simpler, cheaper alternative.
Bluffed Idiom: The product is, in fact, a legitimate Follow the Leader attempt to compete with the iPhone, including its own library of apps and its own interface, similar to but distinguishable from the iPhone's.
We get a glimpse of Bob's house, and it's filled with similar products: Somy television, Macrosoft Windews operating system on a Dull computer, Bob clearly can't tell the difference between the real thing and a shoddy fake.
Bob tests Alice's iPhone and decides that he wants one. He accidentally buys a jPhone, only to discover that it's hollow inside and doesn't work at all. Despite this, he's convinced that the jPhone is the real deal and the iPhone is a shoddy knockoff.
Back and Forth Idiom: Bob buys a yPhone, but it turns out to be a legitimate attempt at competition with the iPhone. His grandmother, however, doesn't know he bought one and buys him a jPhone, which hardly works. Bob then gets rid of both and learns to spot fakes, but the counterfeiters learn to produce better fakes and Bob ends up buying a Somy television...
Deliberate Idiom: "I need to make money, but how... Oooh, I know! I'll make counterfeit versions of real electronic devices and fool people with them!"
Hijacked Idiom: After accidentally buying the yPhone, he replaces Alice's iPhone with it because she'll notice it immediately if he just steals her iPhone, but replacing it with a fake gives Bob time to get away. Alice, being The Ditz, might never notice the difference at all anyway.
Prevented Idiom: "Oh, Hell no. I ain't getting fooled by this crap. I know a fake when I see it."
Talked About Idiom: "Bob's always buying fake devices like that yPhone. Should I talk to him about it?"
Out-Of-Universe Idiom: "Ugh, this episode Bob buys a yPhone. More like yPhony, am I right?" "Lame pun, and they do this plotline way too often. It's like the director has a Fetish for crappy fakes."
Analysed Idiom: Bob never actually gets what he needs out of things: his computer hardly works, and what it does it doesn't do well. His TV has bad picture quality and only gets three channels. His yPhone doesn't do the things he wanted an iPhone to do, or even send text messages (which causes problems, because his friends do a lot of texting). The counterfeit producers are taking his money and hiding behind Chinese sovereignty to keep away from the wrath of Sony, Microsoft, Apple, and the like.
Upgraded Idiom: Of course, Bob doesn't really need these electronic devices much anyway. They're entertainment. Plus, he eventually learns to recognize the real deal, and doesn't get fooled anymore.
Done For Fun: Bob tries to "fix" his yPhone to make it work like an iPhone
Done For Crisis: Bob tries to buy an iPhone for his girlfriend Alice, but accidentally buys her an yPhone. Alice is offended and believes Bob did it on purpose because he doesn't love her.