Hey - You can download Instagram onto your Vodafone Smart Kicka or any other Android powered device in one of the 3 way
Go here https://play.google.com/store/apps/details?id=com.instagram.android&hl=en
using you Vodafone VF685's browser and click on the green install button and follow the on-screen instructions
launch the Play Store app from your VF685 > Tap the search field and type "Instagram" without quotes > hit Go or search > select the Instagram app from the results and click to install
Go here http://www.techspot.com/downloads/5762-instagram-for-android.html
and download the Instagram app there onto your device's memory or SD card > locate the .apk file when done downloading and tap it > (You may have to tap Settings > and then check the "Unknown sources" check box first) > tap Install after reviewing the terms...and wait until the installation is completed.