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Nokia N70/N72/N73: ~45 million
One of Nokia's first widely available 'smartphone' for the wider market, the Nokia N-series devices were equipped with Symbian 60 and high-resolution cameras (for the time), making these a niche but popular line-up of devices. In 2009, Nokia was selling more than 400 million devices. During this time, N-series phones churned up a significant minority of this overall figure. In one quarter alone, Nokia sold more than 9 million of these phones, making the N-series range one of the more popular ranges on offer.
Image: CNET Asia (N70); Nokia (N72, N73)