What is the software that comes with Lenovo A750 to send short messages and speak by voice?

According to your description, you are talking about music voice software, music voice, which is pre-installed in Lenovo music mobile phone.

Users can make phone calls, send short messages, chat, search the Internet, navigate the map, find the surrounding food hotspots, query the weather, query stocks and other functions by sending various instructions to music voice.

You can visit Lenovo Music Store (app.lenovo.com/) to search for the experience.

For more information about Lenovo products, please visit Lenovo Service and Support: www.lenovocare.com.cn/default.aspx.