How to set the beginning of etl wireless network card in Laos?

Etl tariff is 5w old COINS 2G traffic, 10w old COINS 4G traffic. The specific opening method is (first buy a wireless network card Cato with a card, 25w old coin): send SMS d3 to 333, which is 2G traffic, and send SMS d4 to 333, which is 4G traffic. The card in the network card should be specially used for making phone calls, but the calling card can't be put in the network card.