The new feature will be rolled out gradually, beginning with users who have the most recent version of WhatsApp on their phones.
Saiful Mahdi was imprisoned for three months over comments made in a WhatsApp messenger group chat among fellow academics, which criticised a hiring process for lecturers.
A major outage hitting all three platforms, which have billions of users, is rare though apps are regularly forced offline by technical problems.
A Taliban spokesman meanwhile criticises Facebook for blocking 'freedom of speech' in Afghanistan.
The accused leaked information regarding the suspension of sport, physical activity classes and programmes for children and youth.
WhatsApp says rules that require tracing the origin of chats are the equivalent of keeping a 'fingerprint of every single message sent on the service'.
Ketika program imunisasi bermula, teori menentang vaksin muncul dalam bentuk ‘penyelidikan perubatan’
Salah satu dakwaan oleh ‘jurnal perubatan’ memberi amaran vaksin Pfizer boleh menyebabkan penyakit berkait otak.
The California giant last month delayed implementation of a new policy which critics said could expand data collection from some two billion WhatsApp users around the world.