Singtel has just launched a new sub-brand of mobile plans called Heya. This innovative new line of plans is designed for young people who want the flexibility to control their spending. To celebrate this launch, NPN has teamed up with Singtel to develop and create a retail app for their new Heya mobile plan. This retailer app allows retailers to perform customer Heya mobile plan topups on the app. This is a very convenient solution that will allow customers to easily top up their mobile plans at any retail shop that offer this service. This will greatly improve the customer experience and make it much easier for them to keep their mobile plans up to date.