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One of Nokia's first 'business' phones, the Nokia 8910i was housed in a titanium shell. Back then, a strong device meant it was designed for business use -- and it was marked as one of the most expensive devices at the time. Released in 2003, it was tiny, thick in depth, but surprisingly light. The case underneath the screen slid out to reveal a thin-button keypad and protected the device from scratches and bumps.
But one of the major problems with an all-metal device, particularly for those in northern and eastern Europe, was that making a call would almost-always result in high-pitched squeals and yelps because the titanium shell would retain almost no heat. As a result, it was like holding something frozen to your head each time you wanted to call someone.