Grand Theft Auto IV (GTA 4) remains a benchmark for open-world storytelling. While Rockstar Games has officially released GTA: San Andreas and GTA: Vice City on mobile, GTA 4 has never been officially ported to Android or iOS by Rockstar.
If you want to help bring GTA 4 to mobile legitimately, support official petitions and wait for Rockstar Games to announce a port—though given their focus on GTA 6 and GTA Online, that day may never come. Stay safe, and keep your Android device clean. Liberty City will still be waiting—on PC or console. Gta 4 Obb Files