Complex sentence: The Nokia 7650 was one of the first Nokia smartphone released using the Symbian OS (Symbian OS v6.1) and it was one of the first Series 60 (Series 60 1.0) platform devices.
Split into simpler sentences: The Nokia 7650 was one of the first Nokia smartphone released using the Symbian OS (Symbian OS v6.1). It was one of the first Series 60 (Series 60 1.0) platform devices.