かけてすぐ
- Is now a good time to call?
- Are you busy? (casual)
○○の件で電話しました
- It’s about playing football on Saturday.
ちょっと待ってもらう
- Could you hang/hold on?
待ってもらった後
- Sorry to keep you waiting.
伝言を承る
- Can I take a message?
彼は今いません
- He is not available.
折り返す
- Can I call you back?
電話が遠いようです
- Could you speak up please? I can’t hear you. It’s a bad line.
番号が違うようです
- Sorry, I think you’ve got the wrong number.