noun
Mobile Suica
A mobile-phone-based service that provides Suica IC card functions (fare payment, e-money, etc.) on compatible devices.
モバイルＳｕｉｃａを使えば、スマホで改札を通れます。
With Mobile Suica, you can pass through the ticket gate using your smartphone.
Suica is the physical IC card; Mobile Suica is the mobile-phone-based version of the same service.
From English 'mobile' + 'Suica' (the JR East IC card brand name).