A more thorough explanation:

Definition: POP (Point of Presence) is a term used in telecommunications to refer to the calculation of the potential customer base for a mobile-phone-service provider. It is calculated by multiplying the number of people living in a particular area by the percentage ownership of the area's cellular service by the company.

• If a mobile-phone-service provider has a 30% ownership of the cellular service in an area with a population of 100,000, then the POP for that provider in that area would be 30,000.
• Another example could be a provider having a 50% ownership of the cellular service in an area with a population of 50,000, resulting in a POP of 25,000.

These examples illustrate how POP is calculated by multiplying the percentage ownership of the cellular service by the number of people living in the area. It helps mobile-phone-service providers to estimate their potential customer base in a particular area and plan their marketing strategies accordingly.