Displaying Numeric Keypad only on mobiles for Numeric Inputs on Forms

In order to display Numeric Keypad only on mobiles/tablets create the <input> types as "number" or "tel" for telephone numbers as shown below

<input type="tel" name="mobilenumber"/>

<input type="number" name="age"/>

or

<input type="text" pattern="[0-9]*" /> (Works only for iOS)