You do not need cheat devices to get to the second island early. Rockstar hid a few "developer-approved" exploits.
The safest and most authentic way to unlock the full Vice City map is to progress through the story and complete side missions. For quicker access, in-game cheats, community late-game saves, or reputable single-player mods offer free alternatives—use them cautiously and only in single-player contexts.
For many, the "Hurricane Warning" that locks the bridges is just a suggestion. Early-game explorers often use the (spawned via cheats or found after collecting hidden packages) to bypass roadblocks entirely. In the Definitive Edition , players still use the classic "Ambulance over the fence" trick to access high-tier weapons like the Minigun and M4 before even meeting Diaz. For those on Android, dedicated Map Unlock Mods remove all barriers and mission requirements instantly through a simple file replacement in the data folder.
If you want to unlock the map legitimately and for "free" (meaning no cheats required), you must reach a specific milestone in the storyline.