Are there any contracts or fees to switch to Ultra Flex? Mariel Frankl March 16, 2019 19:31 Updated Follow No! There are no fees or contracts needed to begin an Ultra Flex plan. Related articles What is MTS Tax? How do I buy an Ultra Flex SIM? Do I need to pay sales tax when buying a Purple SIM online? What happens if I forget to make a payment? How do I set my MMS/Data Settings? Comments 0 comments Article is closed for comments.