Service has been slow or I don't have any at all for the past week . It will not use data therefore i cannot use apps and i have to send text as Regular text messages instead of iMessage. turning phone off and back on doesn't work. nothing works. im not paying 107 a month for something that doesn't work. when this happens it shows i have 3-4 bars LTE but it acts like and keeps saying no internet connection. what do i do???