To change the language on a Fujitsu F-04J DoCoMo (Raku-Raku Smartphone Me), you must navigate through the Japanese menu icons in the settings. While this model is designed for the Japanese market, it typically supports English as a system-wide option. Step-by-Step Language Change
Rooting the F‑04J is difficult and voids warranty, plus it may break docomo’s original features (Osaifu‑Keitai, 1Seg). Not recommended for most users. change language in fujitsu f04j docomo full