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How does Unicom charge the phone bill by sending SMS?

Unicom users can reply "3# Recharge Card Password # Recharge Number" or "CZ# Recharge Card Password # Recharge Number" to recharge their mobile phones, fixed lines and PHS. By default, they will recharge their mobile phones without adding numbers.

Tips: Take Chongqing as an example. Due to the different business rules in different provinces and cities, you can call the customer service center of the local operator for consultation.