WhatsApp is the most popular internet messaging available now a days.Facebook is take over whatsApp as part of business expansion.
Facebook extending the whatsApp services.They are published whatsApp sim for overcome the limitations ofinternet based messaging.Mainly this for travelling to different countries.They can use whatsApp without any roaming charges.
The whatsim price is €10(750/-) for a year. This allows customers one year of free text messages but images,video,voice messages are chargeable.For €5 will get credit of 1,000. Zeromobile is the italian company behind WhatSimYou can recharge the sim from their website.