Are there any contracts or fees to switch to Ultra Flex? Mariel Frankl December 03, 2018 01:41 Updated Follow No! There are no fees or contracts needed to begin an Ultra Flex plan. Related articles What is MTS Tax? Do I need to pay sales tax when buying a Purple SIM online? Can I keep my current phone number when I switch to Ultra Flex Family or Ultra Flex? Can I save money by buying multiple months up front? What is Auto Recharge? Comments 0 comments Article is closed for comments.