The check examines the so-called Jad file on frequently occurring errors. Some errors are otherwise very hard to find, so you save time during troubleshooting. Other errors leads to installation problems on only a few phones. According to Murphy Law, typically the phones of the most important customers. As a provider the test helps to avoid trouble and increases your customer satisfaction.

I have detected the needs for such a test three years ago. My former web host provider has done a server update and forgot to configure the Mimetype :-( . So I wanted to find such errors quickly in the future. I first wrote a command line tool. I found out that I was well ahead of time, even online shops for mobile phones had unnecessary software errors in the JAD-production online. Finally I came up with the idea of an online version of my Jad Check to show my skills to other providers.

In the cloud

The Jad check is also my project for doing a practical test of Google’s App Engine. Since August 2008, the Jad-Check service is online and has been presented in the developer programs for Nokia, SonyEricsson, Sun and Vodafone.

So far I am satisfied with the AppEngine. The development was rapid, the application is running smooth, and there was no negative feedback. The online service can be found here:

jadcheck.appspot.com

It think the following is interesting:

In China, overloaded websites are popular, even when they are confusing and difficult to use. The design need to show that there is life. A cleaner design implies that the service is unpopular.

To the report “Forum Nokia Design Update — China”

Summer with friends at Flensburgs beach. In the late afternoon we get hungry. How about pizza? W. says, that the pizza service “Joeys” would deliver here. However, we have no flyer of them, not to mention a phone book. What we have are many phones. An ideal “use case” to take advantage of the mobile Internet. Enter “www.joeys.de” in the browser. That is quickly done, the page exists, and thanks to the WebKit browser of my Symbian phone, we can see the normal HTML4 page: (Many mobile browsers would have abandoned here)

Unfortunately, the site is made for the big screen. Despite the automatic scaled view, it is difficult to get an overview of the page. After some scrolling up and down, left and right, I try to follow the link “Bestellen” (Order). On the new page I can use the first letter to select my city. An “F” brings me to the address and telephone number of the Flensburg branch. There you go!

We enter the telephone number into a second phone, just in case. Now let us see what else the site has to offer for us. The link to Flensburgs branch gets us also to the menu with the prices. Pizza is available in three different sizes. Two small pizzas cost as much as an extra large.

Now the question: Where do you get more for your money? The feeling of sizes is easily fooled for quadratic and therefore non-linear estimations. So I switch to the calculator application of the phone. A large pizza has actually much more area than two small ones.

Back to the Website of the Pizza Service. There is even an online form to order the pizza. But this seems to bee much too laborious and error-prone on the mobile phone. So we doing a well prepared call, arrange a transfer point on the beach, and soon we get our extra large maxi-pizza. delivered to the beach.

The pizza was also very good, especially the “sundried tomatoes. Pizza on the beach is without a doubt a great luxury, made possible thanks to the mobile Internet.