First, You need to download the app from the play store
and Login inside it with the help of an Email id.
- Go to The Setting Option.

Click on Go Premium.

Click on Upgrade to Premium.

- Choose the required Plan. Click on continue to payment.

- Click on the Activation key.

- Inside Enter Activation Key, you must enter the activation key that you get from the reseller person.

- After Applying the activation key, your Whatstool account is Upgraded to Premium.
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