The OS is not 14-year-old but actually the newest reiteration of S40 which has no problems running Whatsapp, native Facebook apps, Exchange support et cetera. It is not a dumb phone but a feature phone. The OS still has its raw edges here and there[0], but it is anything but old or dated.
[0] I tried it for a week or so on a Nokia 301 and an example of a raw edge is that when using the music player and you accidentally remove the head phones, the music continues over the phone its speaker immediately. It should pause instead.
[0] I tried it for a week or so on a Nokia 301 and an example of a raw edge is that when using the music player and you accidentally remove the head phones, the music continues over the phone its speaker immediately. It should pause instead.