TouchPal, the mobile keyboard application developer, today released a new version of its caller identification and mobile services app. Thanks already to the popularity of WeChat and similar messaging apps, Chinese telecom operators have seen significant decline in revenue from text messages. The instant messaging service by China Mobile, the largest telecom operator by user base, has added a voice call option. EasyChat, the messaging app jointly owned by Chinese Internet company Netease and China Telecom, has added one too. But, according to TouchPal, there isn’t another app that offers voice calls completely for free.