Answer: Nokia N-Gage
If you have never heard of the Nokia N-Gage, you are certainly not alone. Produced by Nokia in 2003, the N-Gage sold just five thousand units – 0.012% of the sales volume initially claimed by Nokia – upon release, firmly marking it as one of the largest commercial flops in the handheld history
How did Nokia, the same company behind Nokia 1100 (the world's best-selling mobile phone), produce such a poorly received product? By the late 1990s, mobile gamers often carried both a mobile phone and a portable gaming system (such as a Nintendo GameBoy). Nokia had a foresight at the amalgamation of the mobile phone and mobile game markets, but what they delivered to meet that demand, the N-Gage, was an awkward combination of the two. The N-Gage looked like a bizarre hybrid of a mobile phone and Nintendo GameBoy Advance. The large taco-like case was clunky as a phone, had awkwardly placed speaker and microphone openings, and poor button layout for gaming. In addition, a high retail price ($ 299, more than twice the cost of a GameBoy Advance) and a lack of game development contributed to a lack of consumer interest.
Although Nokia tried to breathe new life into the system by releasing an updated model, N-Gage QD, in 2004, at the time, the N-Gage name had been associated with the original model and its malfunction. Despite extensive promotion of the system, millions of units have remained unsold. Nokia eventually folded the N-Gage gaming platform into the design of many of their non-gaming phones; N-Gage lives on as a sort of iTunes / Play Store clone for Nokia phones.