Answer:
personalization.
Explanation:
Based on the information provided within the question it can be said that the one thing that your website does not offer is personalization. This refers to allowing your customers to choose the parts of the product that they want and the ones they do not in order to create and order a version of the product that fits their needs. Which, as a phone manufacturer you cannot do since phone models are fixed products that do not have swappable parts.
