Here are some articles that may help you

Can I keep unused prepaid phone credit when recharging?

A number of factors determine what happens to unused credit in your prepaid phone account when recharging, whether you can retain it or it's forfeited.

Choosing the right prepaid recharge voucher

If you’re not sure what value prepaid voucher you need to choose to get the prepaid offer you want, follow this guide for more information.

Backing up your Windows Phone to OneDrive

You can protect your stuff by setting up automatic back up to OneDrive on your Windows Smartphone. This article will show you how it’s done.

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