I can understand having multiple devices with the same issue being frustrating. Have you received and tested the new software version 1.70.605.0 for the Thunderbolt? If you have received the update and are still experiencing this I would try the factory reset after the update to refresh. The update was designed to assist with most of the actions you described. Please let me know the results and answers to the information above and we can move forward from there. Thank you.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.