Motorola Inc., which is introducing 20 new cell phones as it tries to avoid slipping to No. 3 in the market, signaled its confidence Wednesday for strong holiday sales and said there are no further product delays in sight.

A year ago, Motorola’s holidays were spoiled by a parts shortage and resulting shipment delays that kept some of its first camera phones—already behind its competitors’—from being available during the biggest season for cell-phone sales.