I submitted my resume online and called me for an interview. They said they would send me an email, but they sent me a message notifying me of the interview time. Is this credible?

You can search their company online and evaluate various aspects! Many companies will use SMS notifications for interviews, which is normal. After all, text messages are much more convenient than emails

You don’t have to worry about whether it is a text message or an email notification~~~At least he has already called you. He only sends you text messages or emails to confirm your address and other information.