I cant call web service in j2me app - mobile

I have develop a j2me app which calls .net windows based web-service.
Its working good in emulator and nokia phones but not working in samsung and micromax.
May be this app can not call web-services in some devices.
Its very useful if any one can answer me.

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Updated details
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Posing the question to Flurry's support team I received the following reply:
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Maybe I should give more information about our project.
Users will use device camera, location services and there will be lots of web service calls as expected.
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