First, sign in to your Dashboard and click the Buy Package button to set up a trial plan.
Select a plan that suits your needs, and click on the Get a trial for 1.99$ button and Verification agreement button:
You will need to fill in the required information to activate the trial at checkout. After that, you will receive an email confirming your trial subscription.
The trial period lasts for 3 days and has 100 MB of traffic.
You will be automatically charged the full price for the selected plan after your trial ends in case you've successfully passed the verification process, otherwise, your subscription will be automatically canceled without any upcoming charges.
If you want to switch to the chosen package before the end of the trial period, you can use the Switch to full subscription button at the top right of your Dashboard: