Basic app features like widget function and document view are broken. Often erroneous information or info is simply unavailable. Preorders, purchases and plan changes are available in the app but all require customer service assistance (read: hours on the phone - not kidding) to actually complete. No place in the checkout process to apply discounts like Up rewards or other promos. Worst is the billing debacle that occurs as a result of using the app to effect any of the aformentioned changes.