BlackBerry Application compatibility wiht smartphone and normal phone - blackberry

I am new to BB development.recently i have developed a simple application using JDE eclipse plugin ( Blackberry JRE 5.0.0.0 ). I have tested this simple application on default simulator i.e. BlackBerry Simulator 9550 , a smartphone simulator.
But when i have tried to test this same application on other simulators i.e. 8520,8900,9630,9700 ( simulators only with keypads, no touchscreen support ),My application just hanged.
Since i am new to the BB development world , any help on how to make my application backward compatible with non touch screen device ,is appreciated..
faithfully
Dharmesh

Solved .
it was a JDE compatibility error. changing a version of JDE has solved my probelm

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IBM Worklight 6.0 application not working in Blackberry 7 Simulator

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I have deleted the app re-deployed and restarted the Simulator also.
App working in Ripple,
Suggest a way to solve this problem.
Don't confuse displaying an app in Ripple to actually running it on a device or simulator.
In Ripple you only load the web resources of the application, just like you would do if previewing it via Worklight Console.
When you run the app in a device or simulator, it has been packaged into its native shell.
Edit your question with the full steps you have taken, from creating the project in Eclipse to adding the environment, any changes you've made there, to setup Ripple with the app and finally running it.

net_rim_crypto error in blackberry

I'm developing a blackberry application to encode and decode some important information. For this I'm using the net.rim.device.api.crypto.* package in my application. I'm developing in blackberry OS 7.1 simulator but my blackberry device has OS 5.0 . When I try to download the app in my device, it gives me the following error:
"This application requires the following module, which is not installed: net_rim_crypto"
Also I'm not able to use the update site and install previous blackberry Os versions as the installation fails whenever I try to install it.
So, my question is mainly: How can I make my apps backward compatible in this case? Also, I'm not able to install and run my app (mentioned above) on the device. How can I accomplish this? Please help. Thanks in advance.
Please note that BlackBerry apps are not backward compatible, that is to say an app built on OS 7.0 will not work with OS 6.0 or OS 5.0. However, an same app built on OS 5.0 will work on handsets with OS 5.0+. Considering you are developing your app in OS 7.1 simulator indicates you are using BlackBerry JRE 7 and net_rim_crypto that you implemented seem to be missing in OS 5. In order to develop apps for OS 5, please work with JRE 5.

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If I close and clear the simulator and run the project, it is working but after all not deploying the app on the simulator.
BlackBerry OS 4.2 is very old. You really do not need to target OS 4.2. It is quite rare. Look at 4.5 or 4.6 as a minimum these days. WhatsApp, one of the most popular third party apps for BlackBerry, does not support anything earlier than OS 4.6.
In your question, you say "If I close and clear the simulator and run the project, it is working but after all not deploying the app on the simulator." When you say 'it is working' what do you mean? It seems it isn't working, as you want to deploy your app, so the wording there is confusing.

WebWorks for the Blackberry development

I have an idea of developing for Blackbery using WebWorks,But from which OS does the WebWorks will be suitable.I know that WebWorks is suited for 5.0 OS and above.
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I am not a web developer,I dont have teh idea over this Web development stuffs.
yes it's available for OS 5 and above
developing in WebWorks can fully support javascript.
but it may show some lags and bugs at OS 5 , but it wrok fine with OS 6 and 7
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I developed a Hello World application using Black Berry Eclipse plug-in. When I rant it on any BlackBerry simulator of which platform version is greater than or equal to 5.0 then the Hello World application is not found listed in the default application list. However, I can run the application from Options > Application : Search (Thridparty) and switch application. How can I make my application come to the default application list on any BlackBerry simulator with platform version is 5.0 or greater.
My Hello World application is built for the JRE BlackBerry JRE 5.0.0
Can any one help....
Thanks,
Benoy Bose
The application is located in the Downloads folder on the phone.
If this is not what you are looking for has an answer, please clarify your question.

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