You can select a payment method for a trip 2 ways:
BEFORE A TRIP:
1. Enter your destination details in the "Where to?" box
2. Tap your payment details, located below the ride options
3. Tap "Change" beneath the selected profile
4. Select the correct payment method
DURING A TRIP:
1. Tap the white panel at the bottom of your screen
2. Tap "Switch" next to the price and payment method
3. Select the correct payment method
NOTE: If you're in a city that accepts cash as a payment option, you won't be able to switch to or from cash during or after a trip.
If you need to change the payment method for a past trip, tap the link below.