Motorola is refreshing its Android smartphones with better cameras and other improvements as it seeks to lure customers who want lower-cost alternatives to leading smartphones.

Motorola, acquired last year by computer maker Lenovo Group, has unveiled three smartphones for its return to China following a two-year absence from the most populous mobile phone market.

Motorola rolled out a circular smartwatch Friday, counting on a more traditional design to win over consumers who have so far shunned other computerized wrist devices.