TextInput with value doesn't change value

Since I don't think email is the only prop of your state.info I recommend you to use setState() properly, in order to modify just that field. According to immutability and ES6, something like:

<TextInput
  placeholder="Email"
  value={this.state.info.email}
  onChangeText={text =>
    this.setState(state => ({
      info: {
        ...state.info,
        email: text
    }))
  }
/>;

Read more about handling TextInput here