Originally Posted by
redburgundy
I'll be touring Silk Road sites in Gansu and Xinjiang next month.
Does China Mobile or China Unicom have better coverage there?
Should I buy a SIM in Lanzhou?
China Mobile, no question. Assuming you are entering China through a larger city (BJ/SH), I would grab a sim there because it would be more useful on future trips (yours or your friends/family).