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This How-To will explain how to change the billing period from monthly invoice to yearly invoice and vice versa in the subscription of PTV Map&Guide internet.
 
Please log in to the administration tool for this purpose.
Select the PTV Map&Guide internet Shop in the upper right corner.
You will then receive an overview of your subscription.
Click on the menu (3 dots on the top right).
Select Change plan
The new available plan is shown with period and price. 
Click on Select
You will get an overview about the change.
Please confirm the order

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