You cannot install or use Whatsapp on your 9-year old phone I’m afraid. Whatsapp stopped support for Symbian handsets like the E63 at the end of last year. The phone has an automatic Wi-Fi network setup wizard, but you can also set up the connection manually and specify the settings. The Nokia E71 can connect to Wi-Fi networks using its built-in Wi-Fi antenna.
WhatsApp for Nokia is not supported for these phones WhatsApp for Nokia will not be supported by phones that run Symbian Anna operating system e.g Nokia N8, Nokia C7, Nokia E7, and phones that run Symbian Belle operating system e.g Nokia 500, Nokia 600 Nokia 603, Nokia 700, Nokia 701, Nokia 808. If you get to find the app therein, send the link to your phone and install it on your device.