Mobile checkout should be designed for one hand, limited attention, and imperfect connectivity. Large tap targets, predictable field order, and wallet options all reduce the work required to complete a purchase. The goal is not to add decoration; it is to make the next step obvious at every moment.

Review the experience on real devices before making assumptions. Confirm that errors appear next to the affected field, that key details are not hidden behind the keyboard, and that the purchase button remains easy to reach. A few focused improvements can turn a frustrating mobile flow into a reliable conversion path.