This is just one of many such services mushrooming in poor countries, using mobile-phone technology that once carried only humble voice and text messages.

利用移动通信技术，类似业务在穷国不断涌现，以上只不过是其中一例，而移动通信技术在过去只携带可怜的通话和短信功能。

youdao

Text messages cost carriers less than traditional mobile voice transmissions, and so they cost users less.

比起传统的移动语音传输，文字短信使运营商花费的成本更低，因此用户的成本也更低。

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Consumers are increasingly using their phones for things other than voice calls, such as text messaging, downloading songs and games, and accessing the Internet.

消费者越来越多地使用手机进行语音通话以外的活动，比如发短信、下载歌曲和游戏，以及上网。

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These include voice-activated systems that let drivers make calls and send text messages without using their hands.

VOA: special.2010.01.08

Unlike do-everything smart phones, the Aura is designed for voice and text communications only.

FORBES: Magazine Article

Voice and text commands in any application for faster access to rich capabilities.

ENGADGET: Canonical announces Ubuntu for smartphones, we go hands-on (video)

But whilst voice and text services are the main uses for the handsets, comparatively few people are downloading and playing games with them.

BBC: NEWS | Technology | Uphill struggle for mobile gaming