FlyVPN has long-term free servers, including the United States, China, South Korea, Thailand, Vietnam, Portugal and so on. In addition to free use for one hour a day, new registered users can use the phone for an unlimited period of 3 days.
Step 1: download and install the client, Windows, mac OS, Android, iOS, Linux
Step 2: log in your FlyVPN account, [create an account]
Step 3: Start using it for free