What we expect are buyers can pay with credit card without having PayPal account.
But there is a conflict in Paypal documentation system we not really understand:
1, As the document "SetExpressCheckout API Operation (NVP)", we must set SOLUTIONTYPE option to "sole".
https://developer.paypal.com/docs/classic/api/merchant/SetExpressCheckout_API_Operation_NVP/
2, In the document "Express Checkout on Mobile Devices", they said that "SOLUTIONTYPE" must be set to "mark".
Does that means, in mobile web, Paypal does not allow to make payment without Paypal account? I think no, because with "SOLUTIONTYPE" set to "sole", we can pay with Credit card in almost cases.
What is the right way to do here?
Thanks for your advice.