

Google Pay, Samsung Pay, or Apple Pay offer faster transactions
I walk into a store, purchase an item, proceed to pay using Google Pay, tap my phone on the POS terminal, complete the transaction, and the store issues a receipt. The simplicity of using Google Pay means there's no need for procedures like scanning the store's QR code, fingerprint (or face) authentication, some places even require entering additional amounts, or showing the payment screen to staff for verification… I find these steps for a single transaction overly complicated.In this example, I draw from real-life experiences of using MoMo and Google Pay for payments. With my phone equipped with Google Pay, I don't even need to unlock it; just bringing the phone close to the POS machine completes the transaction successfully. With my Google Pixel, Google offers the option to enable/disable unlocking authentication for payments, so for small expenses, not needing to unlock the phone for payment is entirely feasible and it's very fast. Even when it's necessary to unlock the phone for payment, I don't need to open the Google Wallet app.

QR code scanning, despite its complexity, is convenient in certain scenarios
The easiest example to notice is in places without POS machines; in such cases, using QR code scanning for payments (with any service or payment gateway, not just MoMo) can be more convenient than using Google Pay and Apple Pay.