Illustration for a new post written by Travis Turner and me.

Telephone number inputs are a pretty common UI feature for tons of websites and applications. Seems simple enough to implement, right? Well, actually we need to account for a lot of different factors: What format will users input the number? Will we support international numbers? In this article, we’ll explore some background information, leaving no stone unturned, to help us effectively make these decisions, and we’ll share practical UI design tips.

Blog Post: Phone inputs and you: the designer’s essential UI guide

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