To change your SIP trunking plan type, log in to your babyTEL web portal, then click on "Shopping".
Next, click "Plan" under the "Store" menu.
For example, you have SIP Trunking Lite and want to change to a different plan, you will see your Current babyTEL Plan:
Choose the plan you will like to change to by checking an option:
Confirm the changes and you're all set!