To avail customer support on WhatsApp, Samsung users will have to send a message to its support number 1800-5-SAMSUNG (1800-5-7267864) to register.
WhatsApp will also stop supporting Windows Phone operating systems after 31 December 2019.
WhatsApp would also end support for Nokia S40 after 31 December, 2018 and Android versions 2.3.7 and older after 1 February, 2020.
WhatsApp will stop working on BlackBerry OS, BlackBerry 10, Nokia S40 and Nokia S60 phones from 30 June, 2017.
Popular messaging service WhatsApp will officially stop working for a number of devices in 2017. This means if you are using an old smartphone or a feature phone, chances are that the app will no longer run from next year.