旧モデルのスマホではWhatsAppが使えなくなる

Support for other operating systems - We provide support for and recommend using the following devices: Android running OS 4.0.3+ iPhone running iOS 9+ Select phones running KaiOS 2.5.1+, including JioPhone and JioPhone 2 Once you have one of these devices, simply install WhatsApp and verify your phone number. Keep in mind that WhatsApp can only be activated with one phone number on one device at a time. Furthermore, there's no option to transfer your chat history between platforms. However, we provide the option to export your chat history as an email attachment.