Answer:
Apple phones are more high end than their counterparts due to various factors with the most important being the brand awareness that Apple possesses.
This means that people would have to spend more of their income of Apple phones than others and they can only do this if they have more disposable income accruing more a higher salary.
In a country like France therefore that has seen wages rise, more people will be able to afford the cost of Apple phones and so the demand will increase. With increased employment as well, people will be able to have access to a stable source of income. This is will also enable them to afford Apple phones thereby increasing the demand for Apple phones as well.