To text a teacher, you need his/her private phone number. That is entirely the teacher’s choice, and the school or district may have rules about this. With the exception of field trips (especially overnight), I don’t give my number to students. I much prefer that they communicate with me via the school email system.
When you call a dead phone does it ring?
Answer: A: With a dead battery it should not ring but it should go to voicemail directly.