1

sir i don.t have a bank card then how can i buy a key

2

You can buy Boldbeast Recorder for Nokia from Nokia ovi store, Nokia allow users in some countries to pay with the phone bill.
You can buy Boldbeast Recorder for Android from Google play store, maybe they have different payment options in your country.
If you buy the software from our web site, PayPal / Avangate also provide many payment options, for example "bank transfer" doesn't need any card.