Momo can't send numbers and letters that others can't see.

Network problems, switching to other networks; Momo version problem, update to the latest version, etc.

Network problem: Please check whether your network connection is normal. If your network is unstable or slow, messages may not be transmitted normally, so try switching to another network environment or using a mobile data network.

Momo version problem: Please make sure that the Momo client you are using is the latest version. If not, please try to update to the latest version.