Shows the danger of underinvesting when competitors are upgrading. Unicom is the small carrier in China, with only 264M mobile and 75M broadband subscribers. In 2016, they added 11M mobile customers but only about 2M broadband. China Mobile's 1.3M LTE cell sites and massive fiber home build is pulling ahead. In 2016, they added 27 million mobile subs (to 849M) as well as 22M broadband (to 77M.) China Telecom has been adding LTE towers at a rapid pace. In 2016, China Telecom added 17M mobile (to 215M) and 10M broadband (to 123M.)
China Unicom did not match the investments of the others. They had no choice but to cut prices & raise marketing expenses. Apparently, the Chinese market knew this profit warning was coming. The stock was not forced down. (This week, BT was down $8B and Verizon down $10B.) I wasn't particularly surprised either. I have been watching the nearly incredible build by China Mobile. China Telekom responded but CU held back. It looked like they were burying their heads in the sand.
I do not pick stocks, especially from 12,000 miles away and without a good knowledge of the market.