Hi I have an Xperia J on the Three Network. When I first bought it It had an option within the messaging option of either using the normal messaging service or WhatsApp. I wasn't using WhatsApp at the time so somehow deleted the option. I now want to use WhatsApp and have reinstalled it but I no longer get the option to use it when I click on messaging - I just get the option of using the normal messaging service. Any advice would be greatly received. Thanks.
