Instant messaging application WhatsApp plans to discontinue support for its service on older smartphone systems such as BlackBerry and Nokia.
In a blog post on the weekend, WhatsApp said it will kill support for its app on the following operating systems by the end of 2016: BlackBerry (including BlackBerry 10), Nokia S40, Nokia Symbian S60, Android 2.1 and Android 2.2 and Windows Phone 7.1.
"While these mobile devices have been an important part of our story, they don't offer the kind of capabilities we need to expand our app's features in the future," said WhatsApp.
"This was a tough decision for us to make, but the right one in order to give people better ways to keep in touch with friends, family, and loved ones using WhatsApp.
"If you use one of these affected mobile devices, we recommend upgrading to a newer Android, iPhone, or Windows Phone before the end of 2016 to continue using WhatsApp," said WhatsApp.
WhatsApp made the announcement a few days after the app turned seven years old.
"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," said the company.
Android and Apple devices dominate today's smartphone market.