Failed to reply to the virtual number SMS.

Network signal problem. Network delay or instability caused by unstable network signals may lead to the failure of sending short messages. It is recommended to check the network connection. Virtual number refers to the telephone number issued by a non-communication company, which is mostly a number sequence that is too long or too short than the conventional telephone number, but has the function of answering and making calls. Commonly used in skype and other platforms that provide VoIP services.