I've downloaded and installed the kotlin adbmob banner sample found here: https://github.com/googleads/googleads-mobile-android-examples/tree/master/kotlin/admob/BannerExample
After that, the only thing I did was replacing the testDeviceId with my own test device id (as shown in LogCat)
MobileAds.setRequestConfiguration(
RequestConfiguration.Builder()
.setTestDeviceIds(listOf("B5A00D93D9B06ED1EF1871EA3C2ABD1C"))
.build()
)
The banner never gets shown and logcat is showing : "Ad failed to load : 3"
So why am I not receiving test ads?
I tried googeling this but it doesn't provide me with clear answers.
I resetted my advertising id in settings -> google and somehow it works now.
Really disappointing how bad the Admob documentation is regarding testing