I bought a phone card at smartone at $68 valid for 6 months. Beware that there are different kinds of sim card. Make sure to get the one with no monthly charge or tunnel fee.
"個電話係工人買定你們買給她呢?" provided by me
"請問增值額最少是幾錢?" not sure, mine will be expired in July.
"上台送機的電話PLAN比較貴, 我既諗法對嗎?" 680 mins for 6 months = 113 mins/month = $11.3/month. I won't join the monthly plan because it will encourage her to use the phone and there is a risk if she calls IDD.
"無用過我比佢既電話作私人用途(如傾計或sms)" same as my helper