I have the 512 unlocked running on the Sprint network. Today about mid-day it would no longer connect the network foe LTE or any data other than just text messages that were text only... Anything with a picture would not download... I have tried shutting down, tried re-start, tried airplane mode all to no avail... I don't think that it is a Sprint network thing since my Sprint Mi-Fi was working just fine... I even used it to connect my phone to send emails... Does anyone have any suggestions other than a trip to the Sprint store or Best Buy? The thing that sucks is the both open later in the day... And I start working about 7:00AM