Phones are re-sold and re-used. They would account for a minor fraction of plastic use. It would be completely unreasonable to set a standard form factor and disrupt the market for an evolving product category.
What could use a standard form factor would be packaging, especially for glass jars and bottles which could be endlessly re-cycled.
What could use a standard form factor would be packaging, especially for glass jars and bottles which could be endlessly re-cycled.