The first thing that you need is to acquire an app which offers this feature. When it comes to this then there are only two apps which stand out. There names are Mobistealth and Flexispy respectively. Each carry similar functions however; Mobistealth is usually the first option because of its payment options and also affordable pricing.
The only problem is that works on fewer phones than its competitor (in terms of the ability to intercept Whatsapp messages) as a result if you cannot get it from them then Flexispy will be your next option.
Tags: spy on whatsapp messages , spy sms