Windows phone allows you to protect all the purchases made through windows phone using the wallet PIN.
- Navigate to settings.
- Swipe right to applications tab.
- Tap on “wallet”.
- If you haven’t already set up “Wallet PIN”, then please set it by turning it on.
- Check the “Use Wallet PIN to protect music, app and in-app purchases”.
The wallet pin won’t be asked for the transactions you make through the web pages. All the music, app and in-app purchases will ask for the wallet PIN.