You decide how to move! Request a change to a higher category after the first 3 months of Next Level Subscription.
Unfortunately, a change to a lower Mobility Group is not contractually possible, although if you wish, by cancelling your current Subscription and paying the corresponding two-month penalty, you can subscribe to the lower segment.
If you wish to cancel your subscription in the penultimate month of the contract, you will only be penalised with the payment of the final monthly fee.