Nobody had heard of OnePlus until April 2014, when the brand announced its first smartphone — the OnePlus One. Top-of-the-line specifications at a price that was unheard of before — this became the mantra OnePlus followed for years to come. I still vividly remember how OnePlus would give you a brand-new phone for destroying your existing one from a different brand. Despite these highs, 12 years after launch, OnePlus has wound up its operations in the U.S. The brand will no longer sell its phones in the country, and here's why it's a huge deal for consumers.