AT&T had already been struggling with a decline in revenue from its traditional wireline phone service as <b>customers continued to<u> drop landlines</u>.</b><br/><br/>What does 'drop landlines' mean?<br/><br/><br/>Can I rephrase the bold part as '<b>landline customers continued to drop</b>' or<b> </b>'<b>customers continued to drop <u>in </u>landlines</b>'?<br/><br/>Thanks.