Is the lawsuit notice sent to me by SMS valid?

The notification letter has been filed.

After filing the case, the court will issue a notice of accepting the case to the plaintiff or a third party with independent claim. Indicate that his claim has been accepted, inform him of his corresponding litigation rights and obligations, and pay the legal fees within a time limit, otherwise he will be rejected. The people's court shall, within five days from the date of receiving the reply, serve a copy of the reply and a notice of accepting the case on the plaintiff. Provisions of the Civil Procedure Law.

Article 125 The people's court shall send a copy of the indictment to the defendant within five days from the date of filing the case, and the defendant shall submit a reply within fifteen days from the date of receiving the indictment. The defense shall specify the defendant's name, gender, age, nationality, occupation, work unit, residence and contact information; The name and domicile of the legal person or other organization and the name, position and contact information of the legal representative or principal responsible person. The people's court shall send a copy of the defense to the plaintiff within five days from the date of receiving the defense. If the defendant fails to submit the defense, it will not affect the trial of the people's court.