I can find no outage in that location. If you have an android device, can you verify mobile network is checked (home/menu/settings/wireless & networks/mobile network). A lot of times that gets unchecked for some reason.
Try going into your settings, and under System Updates (this is on HTC, it may be somewhere else on other manufacturer's phones) choose Update Profile and see if that helps.
Ok. Then please remove/replace battery. You can of course try update profile like @JEALLEN65 said - that's a good step that does fix it a lot of the time. If it's still giving you trouble, please private message me and I'll send a refresh to your device.