Nokia 3310 Custom Rom [upd] -

For that phone, "custom ROM" means using to write modified system binaries.

, which is a fork of Android. While technically more "hackable," there are no widespread community ROMs for it. Summary of Modding Capabilities Original 3310 (2000) New 3310 (2017/3G/4G) Custom ROMs Limited to firmware patches/mods Virtually non-existent Common Mod Flash to 3315 for extra features Theme/Icon changes (limited) Hardware Tool F-Bus/M-Bus Flashing Cables Standard Micro-USB Unlocking hidden menus/ringtones None; used for "digital detox" nokia 3310 custom rom

This is the holy grail. A developer managed to port a limited version of Doom to the 3310 by stripping the UI to the absolute bare metal. The custom ROM replaces the entire OS. You boot the phone, and instead of the standby screen, you get a grayscale, low-FPS version of E1M1. Controls use 4, 8, 6, and 2 keys. For that phone, "custom ROM" means using to