Within the app, you can sometimes earn "Bonus Points" by completing tasks (like inviting friends), which can be traded for days of Premium service.
The most consistent way to get Premium for free is through the system within the mobile app: airdroid premium activation code free upd
Airdroid is a popular remote management tool for Android devices that allows users to access and manage their device from a web browser or desktop client. It offers various features such as file transfer, remote screen viewing, SMS management, and more. Within the app, you can sometimes earn "Bonus