Is there a signal in Tibet? Can I send a text message and make a phone call?

First of all, I am speechless. Secondly, I tell you that Zhai Zhigang is talking to his family in outer space, let alone Tibet! The signal in Tibet is not bad! As long as your friend is not in the mountains, there will be a signal. Tibet is not chaotic now, very good, very peaceful! ! I don't see what happened to my house! Everything is fine!