Open the Google Play Store app.

Tap the menu icon (three horizontal lines) on the top left.

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Choose "Payment methods" from the menu.

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Select the "Add payment method" button.

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Pick a payment option: card, PayPal, or gift card.

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Follow the instructions to enter payment details or redeem a gift card.

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Review and tap "Save" or "Add".

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Set a new payment method as default, if needed.

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Use added payment methods for purchases.

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Ensure sufficient funds for desired purchases.

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