Ims\ext is  interface to provide operator customization mechanism.

WHAT IT DOES?
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It contains interface and default implementation of operator customization.

HOW IT WAS BUILT?
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Ims\ext is compiled as static lib when ImsService.apk is built.

HOW TO USE IT?
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It is used by operator plugins by including following in plugin make file:
LOCAL_JAVA_LIBRARIES += com.mediatek.ims.ext