Guangdong Unicom charges a red envelope. Is there a deadline for charging?

Usually, your prepaid phone bill has no validity period, but the given red envelope or electronic coupon has validity period and can only be used within the validity period. It is suggested that you check the rules of the activities of charging phone bills and sending red envelopes that you participate in or contact Guangdong Unicom for manual customer service consultation, which is subject to local policies.