How does Samsung s5 send mass messages?

If you need to send a group message, please click Edit New Message. When adding a contact, click on the left side of the contact, view the contacts in batches, and then click Finish. If the mobile phone can't send short messages in groups, it is suggested that:

1. Try to replace other mobile phone cards.

2. Try to upgrade the system version (Settings-About Equipment-System Update).

3. Back up the data and try to restore the factory settings (Settings-Reset/Privacy-Restore the factory settings).