What Is A Cheap Calling Card To A Prague Home Line?

I need to call a friend in Prague. The phone card I bought from ring123.com is crappy. It was 5 dollars and I am not even sure I will get 200 minutes out of it. So far, I have 53 minutes left and it is almost half way gone with money.
I would ideally like something with no connection fee, little or no “weekly” or “maintanence” fee (the card I have now is 79 cents per week).
Any help would be appreciated, especially Czech people who call home often and know the best way to do it.
Thank you.

Only way to know is either u ask the shop that sells idd cards.They usually have a brochure.Or do it by trial or error.

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