YOU SAID:
Please make sure you have your phone
INTO JAPANESE
あなたの携帯電話を持っていることを確認してください
BACK INTO ENGLISH
Make sure you have your phone
INTO JAPANESE
携帯電話を持っていることを確認する
BACK INTO ENGLISH
Make sure you have a phone
INTO JAPANESE
電話があることを確認する
BACK INTO ENGLISH
Make sure you have a phone
That didn't even make that much sense in English.