I have T-Mobile.This has just started happening like 3 days ago. My phone signal goes out for some reason around nighttime. In the day its fine. I turn on and off my phone and try to fix the connections and stuff, but the signal does not come back. This has been happening for 3 nights in a row. My parents phones work fine, it's only my phone that doesn't get signal. I do not know what is the problem. When i try to call anyone, my calls get dropped and my texts are failed.