How are you? I'm going to have an interview in my country by mopile phone from France .I do not know how can I start the interview by phone cause It's the first time.Could you give me some advice please.
They are going to phone me.
You can always start with something like "Thank you for the opportunity to speak with you."
If they are interviewing you, it's their job to take it from there.
Make sure you end with "I really appreciate the opportunity to speak with you today."