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Common mistakes in smartphone sites

We've compiled a list of the most common mistakes we're seeing on smartphone-optimized websites, and shared tips on how to avoid them:

As a heavy mobile web user and someone who cares about webmasters doing things right, please take a critical look at your site and make sure you fix any mistakes like these. Please. Your users will love you for it.
Here are some common mistakes we see on smartphone-optimized websites and how to avoid them. Unplayable videos. Many videos are not playable on smartphone devices. This can be due to requiring softwar...
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I guess website developers are still missing a great tool or don't even think about to check the appearance of a site on the most important devices. Any suggestions for a tool, anyone? 
Good question +Ralf Bachmann . A great way to test is to just use a site on a real device. Having friends with a diverse collection of devices helps :)

If you can't test on real devices, you can use the Android SDK and iOS Simulator:

More tips from Google's own webmasters at:

Regardless, you'll become very efficient at spotting issues quickly after some practice, both on your own sites and elsewhere!
I would add something more : if you have an app to make your information available, make sure it handles the URLs of your website properly. Special minus points if your mobile website tells me to download the app although I already have it. I'm looking at you, LinkedIn.
My biggest complaint is that they keep serving up a mobile site. Given a 720p smartphone and a 1200p tablet, I don't usually need a mobile site in the first place. But some sites ignore it when I "request desktop site", or keep jumping back to the mobile site. Worse still if they in-yer-face you about their app, and paralyze forward motion even when you say "no" or already have the app.
I hate it when they show up the mobile version of the site on a tablet and despite switching to Desktop View, show the mobile version. Those sites are the worst..
How about making text you have on your pages legible on a small screen. Like your article for example. Dislike having to zoom and scroll. 
Restaurant websites that insist on posting their menu as a PDF. Yes, I'm sure it is beautifully typeset but many of your potential diners don't want to jump through hoops just to get the gist of your offerings. 
+Michael Maggard You are correct about that but even worse than that I have been to several sites where the menu was posted on a page but the page was so large i could not even view the whole picture without dragging and holding to keep the picture from popping back to original position.  In those cases I would have loved a PDF. lol. And  i have an samsung GS3 so it's no joke.
"A common error is to redirect a user trying to access a URL on the desktop site to an irrelevant URL on the smartphone site." +1
+Pierre Far I get about 35 words per line on the G+ website on my 10" tablet, because it serves the phone version to Android tablets (and to ipads). The user agent string for ipads contains the word "ipad" so sites could easily send something more suitable to those devices (although the ipad mini might be a problem) but Android tablets only have "Android" in the UA string. Is there a way to identify an Android tablet and send it the desktop version?
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