My dad's Unicom number belongs to Luoyang, and now he wants to open a twin city in Zhengzhou. He can't call. How to open it by SMS?

The roaming fee standard in Henan and Guangdong is: 2 yuan function fee per month. You can specify a roaming city in Henan Province, roam to the designated place and make domestic calls, 0. 15 yuan/minute, and the answer is free; Calling at home and non-designated roaming places will be charged according to the package tariff normally. Support multi-city opening, function fee superposition.

You can send the short message "KT**LD" to 100 10 to open the Henan roaming preferential service (* * stands for the abbreviation pinyin of the city name, for example, Anyang is AY).