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How do telecom cards send text messages to buy traffic?

The Method of Opening Traffic Package by SMS in China Telecom;

The machine sends KTLL5 to 1000 1 5 yuan packet with 30M traffic.

The machine sends 60M traffic from KTLL 10 to 1000 1 Open 10 yuan.

The machine sends KTLL20 to 1000 1 20 yuan packet 150M.

The machine sends KTLL30 to 1000 1 30 yuan packet 300M traffic.

The machine sends KTLL50 to 1000 1 50 yuan packet 800M traffic.

This machine sends packets from KTLL 100 to 1000 1 with 2048M traffic.

The machine sends KTLL200 to 1000 1 to open 5G traffic of 200 yuan packet.