Will you be poisoned if you click on an unthemed MMS message?

Yes.

Unthemed MMS messages may contain viruses or malware. If you click on them, you may be infected with mobile phone viruses or be attacked by malware. Therefore, do not click on MMS messages from unknown sources, especially MMS messages without a theme. When you receive a suspicious MMS message, delete it immediately and use mobile phone anti-virus software to conduct a full scan to ensure the safety of your phone.