I created this app to test ITOO and it got a white screen only when it started. As you can see I have disabled nearly everything and still does it.
Did you test this using the apk file? What is there in the user interface? A few buttons?
Which Android device and Android version are you using for your tests?
Btw. you can't send sms from the background. For this your app must be in the foreground
Taifun
Did you try on another device?
Probably an Android 16 issue?
Upload your project here so someone can take a look .. I can check on Samsung A54
Taifun