I give you a phone number. But you have to promise me that. You will call me only when necessary. I speak and listen to English is not good, as I've told you.
I have mobile number you have, but you have to promise me that you will call me only when necessary. Because I speak and listen to English is not good, like I've told you.
I, mobile phone you have, but you must promise me that you will call me only when the need for me to speak and listen to English language only is not good as I have never told you