Download Advanced Input Field 1 FREE Unity. 

Version 1.*.* will still receive critical bug fixes (no new features) for a while.
If you’re starting a new project (or need one of the newer features) you can better use version 2 of the plugin.

Support Thread

This plugin is a custom implementation of the Unity Input Field (it still inherits from the Selectable base class). It adds multiple features & properties and fixes multiple bugs that were in the original Unity Input Field. The logic has been split over multiple (platform-specific) classes to improve readability.
For Mobile platforms (Android, iOS & UWP) a whole new implementation has been written because these were the platforms with the most annoying bugs. Also, new bindings for the native keyboards on Android, iOS & UWP have been added to control more keyboard settings

Supported platforms: PC, Mac, Android, iOS & UWP (Smartphone, Tablet & PC)