I had a challenging time setting up a new line with US Mobile. Long story short, at the final step the payment appeared not to go through, more than once, endlessly spinning. After spending a long time on the phone with a representative, a second session with the account massaged and all cookies cleared resulted in the same problem. Another call to customer service connected me with Maria, and all of the problems melted away. Maria knew the correct procedure to circumvent issues with the user interface, patiently and expertly guiding me through each step. I was prepared for the number port to take at least a day and maybe longer, but everything was completed in about 5 minutes. I'm almost in disbelief that one of the least expensive MVNOs provides great network performance and fantastic 24/7 in-person customer service. Anyone who has tried Visible knows how valuable talking to a real person can be. Kudos to Maria! I hope she receives a well-deserved promotion.