```javascript
WXAPI.fetchWxaMobile(code)
```
["Get the user's WeChat mobile phone number"](https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/getPhoneNumber.html)
+ code Obtain the voucher for mobile phone number callback through WeChat
```json
{
code: 0,
msg: 'success',
data: '13500000000'
}
```