在html里面直接使用不能拨打电话的解决方法如下：
1. 下载cordova的访问白名单插件 ：
命令：cordova plugins add cordova-plugin-whitelist
2. 在config.xml里面添加 如下配置：
<content src = "index.html"/>
<plugin name = "cordova-plugin-whitelist" version="1" />
<access orgin = "*" />
<allow-intent href = "http://*/*" />
<allow-intent href = "https://*/*" />
<allow-intent href = "tel:*" />
<allow-intent href = "sms:*" />
<allow-intent href = "mailto:*" />
<allow-intent href = "geo:*" />
<platform name = "android">
<allow-intent href = "market:*" />
</platform>
<platform name = "ios" >
<allow-intent href = "itms:*" />
<allow-intent href = "itms-apps:*" />
<platform>
