You do not have to provide a credit card to activate the Mitsubishi Connect trial period. However, a discounted post-trial package is available to you if you elect to provide your credit card during the first 90 days from the time of registration. This discount offer applies only to the first owner of a new vehicle. If you place your credit card on file, it will be enrolled in automatic renewal.
If you do not provide your credit card during the first 90 days, it will be required later for renewal of services beyond the initial trial period.
See also: How to Add or Update a Credit Card on Your Account