If you are the one who provide the phone to her or pay for the phone bill, then she can't use that talk to her friends but you. I guess there is no way to stop them calling their friends when going out but just as long as they are still doing the shopping without wasting time and/or you can reach them reasonably, this will be the minimum standard that they have to comply
現在您好淡然,因為阿B未出世..當您見到姐姐一路湊阿B一路講電話,唔會同阿B溝通時候,您會眼火爆.我第一個姐姐湊開NEWBORN,自己自動自覺,收起電話,當時打俾佢,佢永遠都唔聽...之後我就俾個暗示,我先嚮一次然後再打,佢就會聽,出街都好小心...跟住呢個姐姐完全唔掂囉,抱住細佬(1歲多),沿途去買野都講電話,成10分鐘,我係後面跟住佢,佢都唔知道...激爆!! 由佢第一日返工,我已經同佢訂左唔可以講電話,由其湊BB,唔止一次,經常俾我發現,行徑好鬼衰,但好蠢囉.當我地的香港人傻,唉.........最後,佢既LAST DAY 1月2日...已經容忍佢成年..我都好仁慈.....