在美國買電話咭打回香港的事宜﹗請回答以下問題。謝謝

hi....
1. I guess u are talking about the pre-paid calling card. I buy it from Chinatown {super china 2}, US$8 for 600 mins. however everytime u use it, it will deduct the connection fee, u never know how can it operate for the deduction, but average I can have around 400 mins. to talk with HK family. It is the same deduction between 香港手機及固網.
2. already answer in Q.1
3. it is the pre-paid calling card to call from USA to other countries, u cannot call from HK.
4. no SMS function.
5. now I am using the 香港寛頻 2B (HK2B) internet phone to call my HK family, around HK$80 per month and there is unlimit to call. u can call to any homeline or mobile phone in HK.
Hope all informations can help you.