The popular and free WhatsApp messaging service is pulling its support on a number of smartphones later on in the year. Fans of the growing instant messaging client need to upgrade their phones to Apple or the latest generation of smartphones and operating systems. Daily Star Sunday reports: From the end of 2016 WhatsApp won’t work on Nokia S40, Nokia Symbian S60, Android 2.1 and Android 2.2 and Windows Phone 7.1. But perhaps the biggest news is that WhatsApp will no longer work on Blackberry devices, including BlackBerry 10. WhatsApp recently turned seven and the firm says that people’s use of mobile devices looked very different from today. When the firm began the Apple App Store was only a few months old and about 70% of smartphones sold at the time had operating systems offered by BlackBerry and Nokia. Mobile operating systems offered by Google, Apple and Microsoft – which account for 99.5% of sales today – were on less than 25% of mobile devices sold at the time. In a statement on their blog WhatsApp states: “As we look ahead to our next seven years, we want to focus our efforts on the mobile platforms the vast majority of people use. So, by the [...]