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How does China Mobile handle a business in two cities through SMS?

You can edit the free information KTLCYJ+ the last three digits of the roaming area code (for example, you can edit KTLCYJ592 for the package opened to Xiamen) and send it to 10086, and then confirm it according to the information replied by the system.

If successful, it is free to answer the phone at the roaming place, and direct dial to the roaming place and home is 0.29 yuan/minute.