Get previous step form content and use it on new step

Hey, yall. I was wondering if is it possible to get a specific field from the last step and use what has been filled and sent in the current step.

For example, I have a field in the step 1 that is called ‘Plan’. And there is options such as: “1gb”, “400mb”, “200mb”. But in the second step (step 2), I need to use what the user has filled in that field mentioned before. I already tried using $_GET[‘your_plan’], but it is null once when we’re in the new step page.

Please, can someone help me? Thanks!