Complex sentence: It was one of the most popular phones at the time but was discontinued late 2007 when buyers then turned their attention to the Samsung D900i, followed by the Samsung U600 which is the slimmest phone to date with a thickness of 10.9mm.
Split into simpler sentences: It was one of the most popular phones at the time but was discontinued late 2007 and buyers then turned their attention to the samsung D900i. Followed by the Samsung U600 which is the slimmest phone to date with a thickness of 10.9mm.