You can get the GTA 4 "Soviet Connection" theme and various in-game ringtones (zil sesleri) as MP3s through several sources.
The most iconic sound is the main theme, , which is available for streaming or purchase on platforms like Spotify . Gta 4 Zil Sesi Mp3
: Detailed compilations of all purchasable in-game ringtones and sound effects are available on YouTube . You can get the GTA 4 "Soviet Connection"