SamsungApps Store testing (Unity, Android)

I'm successfully tested OpenIAB Unity 0.9.4 plugin with Yandex.Store, Amazon, Google and Apple AppStore but missing something with SamsungApps IAB testing.

My setup steps are:

Create Samsung Seller Account
Add one non-consumable item
Add those lines into AndroidManifest.xml:

<!-- SamsungApps section -->        
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.sec.android.iap.permission.BILLING" />

<!-- OpenIAB section -->        
<activity android:name="org.onepf.openiab.UnityProxyActivity"
    android:launchMode="singleTask"
    android:screenOrientation="sensorLandscape"
    android:label="@string/app_name"
    android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
</activity>

Add those lines into my c# code:

options.prefferedStoreNames = new string[] {OpenIAB_Android.STORE_SAMSUNG};
OpenIAB.mapSku("my.regular.sku.id", OpenIAB_Android.STORE_SAMSUNG, "100000103209/000001016706");

Next I build an apk signed with production key
...and install it onto attached device with comand:

adb -d install -r -i com.sec.android.app.samsungapps /path/to/my-samsung.apk

Also I'm already signed in SamsungApps application with the same account ID as I have on Seller and Developer Portal, but don't know if it necessary for testing workflow.

Then when launching the application first thing I see is a black screen with "Ожидание..." (eng: Waiting...) spin as part or Samsung IAP Activity I guess. After that nothing happens and I should press hardware back button to resume loading of my game.

logcat:

I/Unity   (12385): ********** Android OpenIAB plugin initialized **********
I/Unity   (12385):  
I/Unity   (12385): (Filename: ./Runtime/ExportGenerated/AndroidManaged/UnityEngineDebug.cpp Line: 54)
I/Unity   (12385): 
E/Watchdog(  298): !@Sync 892
D/OpenIAB-UnityPlugin(12385): createBroadcasts
D/OpenIAB-UnityPlugin(12385): Starting setup.
E/OpenIabHelper(12385): bindService() failed for com.yandex.store
E/OpenIabHelper(12385): java.lang.SecurityException: Not allowed to bind to service Intent { act=org.onepf.oms.openappstore.BIND cmp=com.yandex.store/.service.YandexStoreService }
E/OpenIabHelper(12385):     at android.app.ContextImpl.bindService(ContextImpl.java:1120)
E/OpenIabHelper(12385):     at android.content.ContextWrapper.bindService(ContextWrapper.java:370)
E/OpenIabHelper(12385):     at org.onepf.oms.OpenIabHelper.discoverOpenStores(OpenIabHelper.java:497)
E/OpenIabHelper(12385):     at org.onepf.oms.OpenIabHelper$1.run(OpenIabHelper.java:342)
E/OpenIabHelper(12385):     at java.lang.Thread.run(Thread.java:1020)
W/ActivityManager(  298): Permission Denial: Accessing service ComponentInfo{com.yandex.store/com.yandex.store.service.YandexStoreService} from pid=12385, uid=10102 requires org.onepf.openiab.permission.BILLING

Inventory was not recieved after plugin initialization and raised no events. What I'm doing wrong?

Test environment: Unity 4.2.2, OpenIAB Unity 0.9.4 plugin, Galaxy Tab 8.9 with Google Play, SamsungApps and Yandex.Store installed

onepf / OpenIAB

SamsungApps Store testing (Unity, Android) #172