diff --git a/app-unpriv/src/main/java/im/angry/openeuicc/ui/CompatibilityCheckActivity.kt b/app-unpriv/src/main/java/im/angry/openeuicc/ui/CompatibilityCheckActivity.kt
index 20e0c5d..0eb433a 100644
--- a/app-unpriv/src/main/java/im/angry/openeuicc/ui/CompatibilityCheckActivity.kt
+++ b/app-unpriv/src/main/java/im/angry/openeuicc/ui/CompatibilityCheckActivity.kt
@@ -64,6 +64,9 @@ class CompatibilityCheckActivity: AppCompatActivity() {
                 CompatibilityCheck.State.FAILURE -> {
                     root.findViewById<View>(R.id.compatibility_check_error).visibility = View.VISIBLE
                 }
+                CompatibilityCheck.State.FAILURE_UNKNOWN -> {
+                    root.findViewById<View>(R.id.compatibility_check_unknown).visibility = View.VISIBLE
+                }
                 else -> {
                     root.findViewById<View>(R.id.compatibility_check_progress_bar).visibility = View.VISIBLE
                 }
diff --git a/app-unpriv/src/main/java/im/angry/openeuicc/util/CompatibilityCheck.kt b/app-unpriv/src/main/java/im/angry/openeuicc/util/CompatibilityCheck.kt
index ad4b423..3d9c47b 100644
--- a/app-unpriv/src/main/java/im/angry/openeuicc/util/CompatibilityCheck.kt
+++ b/app-unpriv/src/main/java/im/angry/openeuicc/util/CompatibilityCheck.kt
@@ -9,6 +9,7 @@ import im.angry.easyeuicc.R
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.withContext
+import java.io.IOException
 
 fun getCompatibilityChecks(context: Context): List<CompatibilityCheck> =
     listOf(
@@ -38,6 +39,7 @@ abstract class CompatibilityCheck(context: Context) {
         NOT_STARTED,
         IN_PROGRESS,
         SUCCESS,
+        FAILURE_UNKNOWN, // The check technically failed, but no conclusion can be drawn
         FAILURE
     }
 
@@ -49,7 +51,7 @@ abstract class CompatibilityCheck(context: Context) {
 
     val description: String
         get() = when {
-            state == State.FAILURE && this::failureDescription.isInitialized -> failureDescription
+            (state == State.FAILURE || state == State.FAILURE_UNKNOWN) && this::failureDescription.isInitialized -> failureDescription
             else -> defaultDescription
         }
 
@@ -139,6 +141,14 @@ internal class IsdrChannelAccessCheck(private val context: Context): Compatibili
                 // ref: https://android.googlesource.com/platform/frameworks/base/+/4fe64fb4712a99d5da9c9a0eb8fd5169b252e1e1/omapi/java/android/se/omapi/Session.java#305
                 // SecurityException is only thrown when Channel is constructed, which means everything else needs to succeed
                 Pair(it.slotIndex, State.SUCCESS)
+            } catch (e: IOException) {
+                e.printStackTrace()
+                if (e.message?.contains("Secure Element is not present") == true) {
+                    failureDescription = context.getString(R.string.compatibility_check_isdr_channel_desc_unknown)
+                    Pair(it.slotIndex, State.FAILURE_UNKNOWN)
+                } else {
+                    Pair(it.slotIndex, State.FAILURE)
+                }
             } catch (e: Exception) {
                 e.printStackTrace()
                 Pair(it.slotIndex, State.FAILURE)
diff --git a/app-unpriv/src/main/res/drawable/ic_question_outline.xml b/app-unpriv/src/main/res/drawable/ic_question_outline.xml
new file mode 100644
index 0000000..8c0d6eb
--- /dev/null
+++ b/app-unpriv/src/main/res/drawable/ic_question_outline.xml
@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="?attr/colorControlNormal" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M11,18h2v-2h-2v2zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8zM12,6c-2.21,0 -4,1.79 -4,4h2c0,-1.1 0.9,-2 2,-2s2,0.9 2,2c0,2 -3,1.75 -3,5h2c0,-2.25 3,-2.5 3,-5 0,-2.21 -1.79,-4 -4,-4z"/>
+</vector>
diff --git a/app-unpriv/src/main/res/layout/compatibility_check_item.xml b/app-unpriv/src/main/res/layout/compatibility_check_item.xml
index f75741a..0e46668 100644
--- a/app-unpriv/src/main/res/layout/compatibility_check_item.xml
+++ b/app-unpriv/src/main/res/layout/compatibility_check_item.xml
@@ -60,6 +60,14 @@
             android:layout_width="32dp"
             android:layout_height="32dp" />
 
+        <ImageView
+            android:id="@+id/compatibility_check_unknown"
+            android:src="@drawable/ic_question_outline"
+            android:visibility="gone"
+            android:layout_gravity="center"
+            android:layout_width="32dp"
+            android:layout_height="32dp" />
+
     </FrameLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app-unpriv/src/main/res/values/strings.xml b/app-unpriv/src/main/res/values/strings.xml
index 5d4b9db..3a20af1 100644
--- a/app-unpriv/src/main/res/values/strings.xml
+++ b/app-unpriv/src/main/res/values/strings.xml
@@ -13,6 +13,7 @@
     <string name="compatibility_check_omapi_connectivity_fail_sim_number">Only the following SIM slots are accessible via OMAPI: %s.</string>
     <string name="compatibility_check_isdr_channel">ISD-R Channel Access</string>
     <string name="compatibility_check_isdr_channel_desc">Does your device support opening an ISD-R (management) channel to eSIMs via OMAPI?</string>
+    <string name="compatibility_check_isdr_channel_desc_unknown">Cannot determine whether ISD-R access through OMAPI is supported. You might want to retry with SIM cards inserted (any SIM card will do) if not already.</string>
     <string name="compatibility_check_isdr_channel_desc_partial_fail">OMAPI access to ISD-R is only possible on the following SIM slots: %s.</string>
     <string name="compatibility_check_known_broken">Known Broken?</string>
     <string name="compatibility_check_known_broken_desc">Making sure your device is not known to have bugs associated with removable eSIMs.</string>