I do use whatsapp frequently during some period but recently i donot log in to my whatsapp since i donot recieve any message.now i am less busy just feel lik checking my whatsapp then i'm told dat it has expired and i need to upgrade it.dis is not d first time of me upgrading d whatsapp on my nokia X2-01 so i want to ask if there is any importance to upgrading and why do i hav to upgrade and also is it lik dat for other whatsapp users. tanks