What is he looks at his phone when he sees me?

It sounds like you're describing a situation where someone looks at their phone when they see you. Without specific context, it's challenging to interpret exactly why this happens, but here are a few possibilities:

1. Avoidance or Shyness: The person might feel shy or uncomfortable and uses their phone as a way to avoid direct interaction or eye contact.

2. Disinterest: They might not be interested in engaging at that moment and use their phone as a distraction.

3. Coincidence: It could be purely coincidental. The person may have received a notification or remembered something they needed to do on their phone when they saw you.

4. Social Habit: Many people habitually check their phones, almost reflexively, especially in situations where they feel socially awkward or don't know how to engage.

5. Respecting Space: The person might want to respect your space and not intrude, using their phone to give you and themselves some privacy.

Understanding the specific reasons would likely require more information about your relationship with the person and the context of your interactions.