diff --git a/overlay/FrameworksResCommon/res/values/config.xml b/overlay/FrameworksResCommon/res/values/config.xml
index ab0e8c2..92850c9 100644
--- a/overlay/FrameworksResCommon/res/values/config.xml
+++ b/overlay/FrameworksResCommon/res/values/config.xml
@@ -299,4 +299,11 @@
 
     <!-- Whether to select voice/data/sms preference without user confirmation -->
     <bool name="config_voice_data_sms_auto_fallback">true</bool>
+
+    <!-- Number of physical SIM slots on the device. This includes both eSIM and pSIM slots, and
+         is not necessarily the same as the number of phones/logical modems supported by the device.
+         For example, a multi-sim device can have 2 phones/logical modems, but 3 physical slots,
+         or a single SIM device can have 1 phones/logical modems, but 2 physical slots (one eSIM
+         and one pSIM) -->
+    <integer name="config_num_physical_slots">2</integer>
 </resources>