Final answer:
The concept of a new cell phone model replacing an old one is better described as planned obsolescence. Flexible accumulation is more about shifting production strategies in a global economy.
Step-by-step explanation:
A new model of cell phone replacing an old model is an example of planned obsolescence, not flexible accumulation. This concept is related to how products are designed with a predetermined lifespan or relevance, effectively becoming outdated after a certain period to encourage consumers to purchase the latest model.
Flexible accumulation, on the other hand, refers to the ability of companies to rapidly shift their production strategies in a global economy. It encompasses changes in manufacturing processes, the use of technology, and the exploitation of global labor markets to maximize efficiency and profit.