Of course yes.You can upgrade whenever you want.And the effect will be instant right after the payment have been set up!
It is free for you to upgrade your hosting plan.The only one difference is the price between two plans,the one you are now at and the other one you want upgrade to!
It is free for you to upgrade your hosting plan.The only one difference is the price between two plans,the one you are now at and the other one you want upgrade to!