He had to buy a secondhand mobile phone because he had not much money.

因为他没有太多的钱，不得不买了一个二手手机。

youdao

The added advantage is that the money you make is in a sense all yours, because you don't have a mortgage or bills, all I was paying for was the internet and my mobile phone.

附加的优势是在某种程度上，你赚到的钱都是你自己的，因为你没有抵押或账单，所有我需要支付的就是网络和手机的费用。

youdao

Kenyan sugar cane cutters are earning more money because of a mobile phone banking system supported by IBM.

FORBES: IBM Helps Sweeten Earnings for Kenyan Sugar Cane Cutters

Because the mobile-phone companies get paid in advance, they waste no time or money on chasing bad debts, as fixed-line firms do.

ECONOMIST: The digital revolution is helping the poor, too