I use two handsets with two different Orange numbers, both were borked! Started working again at about 4pm, so that was a good 8 hours of outage - bah!
Wasn't just me though, other Orange users in the village had the same problem. Turned out to be a funny phone day, a colleague was trying to call me on my house phone whilst he was on the train, kept cutting him out and he wasn't going through tunnels. Phones these days....