Found the answer:
EDIT: go to whatsapp setting -> notifications -> uncheck contact ringtone (use contact's ringtone as notification ringtone)
After I assign a custom or different stock ringtone to Contact A, the ringtone also gets played when a WhatsApp message is received from that contact. How can I stop this from occurring? Please guide.
Last edited by Jibreil; 5th March 2014 at 08:29 AM.