Go to Mobissue website and log in with your account, Facebook account or Google account.
If you don’t have an account yet, please create an account first.
Go to premium page (https://mobissue.com/pricing.php) to choose a plan that you need: Pro, Gold, Platinum and Enterprise.
After you choose a plan, you will be directed to the Paypal page, then login your Paypal account, fill in the information and complete the order.
Then you can go back your homepage to check your account type.