style sheet -moz-linear-gradient no show in web mobile browser?

[duvall348]

I have a sample code:\[code\]<div class="title"><h3>Test Title<h3></div>\[/code\]And css \[code\].title { background: -moz-linear-gradient(center top , #6F6F6F 0%, #4E4E4E 100%) repeat scroll 0 0 transparent;}\[/code\]When I browser as PC is result OK, but when using mobile phone (samsung galaxy S3, iPhone 4) result not show this style, How to fix it ?