android - html5中tel无效，有些手机可以拨打电话，有些手机不能拨打电话

Question

html5中tel无效，有些手机可以拨打电话，有些手机不能拨打电话，谁知道是什么原因？

Answer 1

tel, wtail, ext:tel, ext:wtai, etc. The currently commonly used telephone protocols are as follows:

客户端	协议类型
iphone_uc	etel
iphone	tel
android_uc	tel
android	wtai
default_uc	wtai
default	wtai

Answer 2

Of course it depends on the mobile phone model, mobile browser, etc. It is not supported but it is beneficial to search engines

Answer 3

Two possible situations:
1. The browser does not support this attribute
2. The browser does not have permission to make calls
It is recommended to check whether the browser supports this attribute before taking downgrade measures. You can use Modernizr's Modernizr.inputtype.tel to detect it.