Here in Ecuador it's mainly cash, but it's becoming more common to just do a normal bank transfer from a mobile phone. The banking app of my bank here (Pichincha) has a built-in option to share the payment as a .jpg via Whatsapp (or any messaging app) as a sort of confirmation to the recipient.
In the Netherlands banking apps let you create "Payment Requests", which is basically a URL you can share with someone to have them pay you (you can pre-fill the amount they need to pay). Typically, if you open such an URL on your phone, it will let you jump into your banking app of _your_ bank to make the actual payment (even if the payment request is from a different bank than the on you're using).
In the Netherlands banking apps let you create "Payment Requests", which is basically a URL you can share with someone to have them pay you (you can pre-fill the amount they need to pay). Typically, if you open such an URL on your phone, it will let you jump into your banking app of _your_ bank to make the actual payment (even if the payment request is from a different bank than the on you're using).