Launch the PhonePe app on your smartphone. If you don't have it, download it from the Play Store or App Store.
Once inside the app, navigate to the 'Scan' section, where you'll be able to initiate a payment.
Tap on 'Scan' point your camera showing on website UPI ID or selecting them from your Gallery.
Enter the amount you wish to transfer and click on 'Pay'. You can add a note for the transaction if required.
Verify the payment details and complete the payment by authenticating with your UPI PIN. Once done, you'll receive a confirmation message.