Is the pre-trial notification text message starting with 1655 real?

No.

Because formal court hearing notices are delivered in the form of documents rather than text messages and phone calls, it may be a fraudulent text message.

Legal documents issued by the people's court to the parties, including summons, notices, rulings, judgments, etc., must be delivered to the person in writing, unless the person agrees to be served by other means. If the person cannot be found, It should also be served by announcement (in newspapers, court announcements), otherwise it will not be legally effective.