Which of the following countries collaborated with telecom networks for payment systems using a phone number?

The correct choice emphasizes the collaboration between telecom networks and payment systems that utilize a phone number for transactions. IMPS (Immediate Payment Service) in India, Swish in Sweden, PayNet in Malaysia, and IPS (Instant Payment Service) in Peru are all examples of payment systems that have integrated effectively with telecom networks to allow users to send and receive payments using just a phone number. This method streamlines the payment process, making it convenient for users to transact without needing to provide lengthy banking details.

These systems leverage the widespread use of mobile phones and the existing telecom infrastructure to facilitate real-time payments, enhancing financial inclusion and accessibility to various demographics. This is significant in regions where traditional banking services may be limited. By using phone numbers, these payment systems also simplify the user interface, enabling a broader range of individuals to participate in digital financial transactions.

The other options do contain payment systems but do not primarily emphasize the collaboration with telecom networks or the use of phone numbers in the same way as the correct choice. For instance, SWIFT and PayPal, while prominent in the payment space, do not typically rely on phone numbers for transferring funds in collaboration with telecom networks.