The average number of contacts in a cell phone will depend on the individual user and the features of their phone. Generally, most users will store around 100-200 contacts in their phone, but this can vary greatly depending on the user’s needs. To optimize the number of contacts you have stored in your phone, it is recommended to periodically review them and delete any contacts that are no longer needed. Additionally, if you have a large number of contacts, you may want to consider organizing them into groups or categories to make them easier to find.