I wrote VibeNokia: a Java ME client for the 2017 Nokia 3310 feature phone that turns it into a chat terminal for Claude, plus a small FastAPI server that stores history, verifies signatures and runs claude -p . The menu also has Telegram, voice messages and a catalogue of 41 mini games. It works on my physical phone, and along the way I had to re-solve several things that a smartphone gets from a one-line library call.

A caveat up front: the client has been tested on one real Nokia 3310 (TA-1030). I haven't tried other Series 30+ or Series 40 phones. The channel between the phone and the server is not encrypted; more on that below, without softening it.

The platform

The 2017 Nokia 3310 is Series 30+ on a MediaTek MT6260. It runs Java ME with CLDC 1.1 / MIDP 2.0, has a 240x320 screen, mobile data only and no Wi-Fi. It has no usable browser and no app store.…