在URL最后面加“ #mp.weixin.qq.com ”，应该加其他qq.com的二级域名都行，估计是微信的安卓内置浏览器是根据域名判断是否屏蔽tel:的。

例如：联系方式的URL是 http://www.sl99.net/contact.asp 改成 http://www.sl99.net/contact.asp#mp.weixin.qq.com，那么这个页面里面所有的 tel:标签都正常了

另外一种方法就是用wxtel.js和jquery-2.0.3.min.js二个js 文件

网页头部添加链接用utf8编码

下面是wxtel.js

var localhost_url=window.location.href;
    var flg_weixin = /(MicroMessenger)/i.test(navigator.userAgent);

    var flg_ios = /(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent);
if (flg_weixin && !flg_ios) { 
if (localhost_url.indexOf("mp.weixin.qq.com") == -1){
  if (localhost_url.indexOf('?') != -1) {
   var goto_url=localhost_url + '&woaibeijingtiananmen=mp.weixin.qq.com';
  window.open(goto_url,'_self');
                        } else {
 var goto_url=localhost_url + '?woaibeijingtiananmen=mp.weixin.qq.com';
      window.open(goto_url,'_self');
                        }
}
}
$(function () {
    var flg_weixin = /(MicroMessenger)/i.test(navigator.userAgent);

    var flg_ios = /(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent);

    if (flg_weixin && !flg_ios) {
        $('body').on('click', 'a', function (e) {
            var url = $(this).attr('href');
            if (url) {
                if (url.indexOf('tel:') == 0) {

                } else {
                    var new_url = url.replace('http://', '').toLowerCase();
     //alert(new_url.indexOf('/'));
                    if (new_url.indexOf(location.host) == -1 || new_url.indexOf('/') == -1) {                    
     //alert("123");
                        e.preventDefault();
      
                        if (new_url.indexOf('?') != -1) {
       
                            window.location.replace($(this).attr('href') + '&woaibeijingtiananmen=mp.weixin.qq.com');
                        } else {
                            window.location.replace($(this).attr('href') + '?woaibeijingtiananmen=mp.weixin.qq.com');
                        }
                        return false;
                    }
                }
            }
        });
    }
});<script type="text/javascript" src="js/jquery-2.0.3.min.js" charset="utf-8"></script>
<script type="text/javascript" src="js/weiba.js" charset="utf-8"></script>