他购买了预付款电话卡，再把电话卡以储值卡的形式卖给村民。

Then he bought prepaid phone CARDS and sold them to villagers in pay-as-you-go form.

youdao

透过*108*打出电话：漫游费用会于你接听系统回电时开始计算。 如对方未能接听电话或电话繁忙，有关费用仍会于储值卡内扣除。

Making calls by*108*: charges will commence once you answer the call made by the system to place the call, irrespective of whether the called party is successfully connected or not.

youdao