If your goal is to play the full, official GTA V on your phone in 2026, you cannot do it via a 2.1GB APK download. Instead, you must use cloud gaming services.
Technical plausibility
no official for Android, as Rockstar Games has never released a mobile version of the game. Any file claiming to be "Gta V.apk" with a size of 2.1GB is likely a mod, a fan-made project, or potentially malicious software. The Reality of GTA V's File Size Gta V.apk File Size 2.1gb