These data packs will enable Tata Docomo prepaid GSM customers to enjoy the hugely popular WhatsApp with specially customize Data plans and with unlimited use without any data charges. Tata Docomo prepaid Customers simply have to dial *123# from their Tata Docomo mobile to subscribe to these packs.The WhatsApp packs offer FREE Unlimited use with a Bi – Monthly pack priced at Rs. 15 valid for 15 days and a Monthly Pack priced at Rs. 30 valid for 30 days