Very rarely, Yi Technology runs official promotions (e.g., buy a camera and get 1 month free). These codes are legitimate but short-lived. By the time they are shared publicly on forums, they are either already used up or expired.
When using these codes, ensure you're on a legitimate website and follow these guidelines:
If your trial has expired or you want to avoid monthly fees, you can use Local Storage
Let’s assume you ignore the warnings and download a "free activation tool." Here is what actually happens behind the scenes: