diff --git a/atoll.mk b/atoll.mk
index d461277..2b7d521 100644
--- a/atoll.mk
+++ b/atoll.mk
@@ -8,6 +8,9 @@ PRODUCT_BUILD_SUPER_PARTITION := false
 PRODUCT_USE_DYNAMIC_PARTITIONS := true
 
 # Overlays
+DEVICE_PACKAGE_OVERLAYS += \
+    $(LOCAL_PATH)/overlay
+
 PRODUCT_ENFORCE_RRO_TARGETS := *
 
 # Inherit proprietary targets
diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
new file mode 100644
index 0000000..7cfa2fc
--- /dev/null
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -0,0 +1,296 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2009 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<!-- These resources are around just to allow their values to be customized
+     for different hardware and product builds.  Do not translate. -->
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <!-- If this is true, the screen will come on when you unplug usb/power/whatever. -->
+    <bool name="config_unplugTurnsOnScreen">true</bool>
+
+    <!-- Boolean indicating if restoring network selection should be skipped -->
+    <!-- The restoring is handled by modem if it is true-->
+    <bool translatable="false" name="skip_restoring_network_selection">true</bool>
+
+    <!-- Set to true to add links to Cell Broadcast app from Settings and MMS app. -->
+    <bool name="config_cellBroadcastAppLinks">true</bool>
+
+    <!-- This string array should be overridden by the device to present a list of network
+         attributes.  This is used by the connectivity manager to decide which networks can coexist
+         based on the hardware -->
+    <!-- An Array of "[Connection name],[ConnectivityManager.TYPE_xxxx],
+         [associated radio-type],[priority],[restoral-timer(ms)],[dependencyMet]  -->
+    <!-- the 5th element "resore-time" indicates the number of milliseconds to delay
+         before automatically restore the default connection.  Set -1 if the connection
+         does not require auto-restore. -->
+    <!-- the 6th element indicates boot-time dependency-met value. -->
+    <string-array translatable="false" name="networkAttributes">
+        <item>wifi,1,1,1,-1,true</item>
+        <item>mobile,0,0,0,-1,true</item>
+        <item>mobile_mms,2,0,4,60000,true</item>
+        <item>mobile_supl,3,0,2,60000,true</item>
+        <item>mobile_dun,4,0,2,60000,true</item>
+        <item>mobile_hipri,5,0,3,60000,true</item>
+        <item>mobile_fota,10,0,2,60000,true</item>
+        <item>mobile_ims,11,0,2,60000,true</item>
+        <item>mobile_cbs,12,0,2,60000,true</item>
+        <item>bluetooth,7,7,2,-1,true</item>
+        <item>mobile_emergency,15,0,5,-1,true</item>
+        <item>ethernet,9,9,9,-1,true</item>
+    </string-array>
+
+    <!-- This string array should be overridden by the device to present a list of radio
+         attributes.  This is used by the connectivity manager to decide which networks can coexist
+         based on the hardware -->
+    <!-- An Array of "[ConnectivityManager connectionType],
+                      [# simultaneous connection types]"  -->
+    <string-array translatable="false" name="radioAttributes">
+        <item>"1,1"</item>
+        <item>"0,1"</item>
+        <item>"7,1"</item>
+    </string-array>
+
+    <!-- Whether WiFi display is supported by this device.
+         There are many prerequisites for this feature to work correctly.
+         Here are a few of them:
+         * The WiFi radio must support WiFi P2P.
+         * The WiFi radio must support concurrent connections to the WiFi display and
+           to an access point.
+         * The Audio Flinger audio_policy.conf file must specify a rule for the "r_submix"
+           remote submix module.  This module is used to record and stream system
+           audio output to the WiFi display encoder in the media server.
+         * The remote submix module "audio.r_submix.default" must be installed on the device.
+         * The device must be provisioned with HDCP keys (for protected content).
+    -->
+    <bool name="config_enableWifiDisplay">true</bool>
+
+    <!-- Set to true if the wifi display supports compositing content stored
+         in gralloc protected buffers.  For this to be true, there must exist
+         a protected hardware path for surface flinger to composite and send
+         protected buffers to the wifi display video encoder.
+         If this flag is false, we advise applications not to use protected
+         buffers (if possible) when presenting content to a wifi display because
+         the content may be blanked.
+         This flag controls whether the {@link Display#FLAG_SUPPORTS_PROTECTED_BUFFERS}
+         flag is set for wifi displays.
+    -->
+    <bool name="config_wifiDisplaySupportsProtectedBuffers">true</bool>
+
+    <!-- ComponentName of a dream to show whenever the system would otherwise have
+         gone to sleep.  When the PowerManager is asked to go to sleep, it will instead
+         try to start this dream if possible.  The dream should typically call startDozing()
+         to put the display into a low power state and allow the application processor
+         to be suspended.  When the dream ends, the system will go to sleep as usual.
+         Specify the component name or an empty string if none.
+
+         Note that doze dreams are not subject to the same start conditions as ordinary dreams.
+         Doze dreams will run whenever the power manager is in a dozing state. -->
+    <string name="config_dozeComponent">com.android.systemui/com.android.systemui.doze.DozeService</string>
+
+    <!-- If true, the doze component is not started until after the screen has been
+         turned off and the screen off animation has been performed. -->
+    <bool name="config_dozeAfterScreenOffByDefault">true</bool>
+
+    <!-- Screen brightness used to dim the screen while dozing in a very low power state.
+         May be less than the minimum allowed brightness setting
+         that can be set by the user. -->
+    <integer name="config_screenBrightnessDoze">12</integer>
+
+    <!-- Power Management: Specifies whether to decouple the auto-suspend state of the
+         device from the display on/off state.
+
+         When false, autosuspend_disable() will be called before the display is turned on
+         and autosuspend_enable() will be called after the display is turned off.
+         This mode provides best compatibility for devices using legacy power management
+         features such as early suspend / late resume.
+
+         When true, autosuspend_display() and autosuspend_enable() will be called
+         independently of whether the display is being turned on or off.  This mode
+         enables the power manager to suspend the application processor while the
+         display is on.
+
+         This resource should be set to "true" when a doze component has been specified
+         to maximize power savings but not all devices support it.
+
+         Refer to autosuspend.h for details.
+    -->
+    <bool name="config_powerDecoupleAutoSuspendModeFromDisplay">true</bool>
+
+    <!-- Power Management: Specifies whether to decouple the interactive state of the
+         device from the display on/off state.
+         When false, setInteractive(..., true) will be called before the display is turned on
+         and setInteractive(..., false) will be called after the display is turned off.
+         This mode provides best compatibility for devices that expect the interactive
+         state to be tied to the display state.
+         When true, setInteractive(...) will be called independently of whether the display
+         is being turned on or off.  This mode enables the power manager to reduce
+         clocks and disable the touch controller while the display is on.
+         This resource should be set to "true" when a doze component has been specified
+         to maximize power savings but not all devices support it.
+         Refer to power.h for details.
+    -->
+    <bool name="config_powerDecoupleInteractiveModeFromDisplay">true</bool>
+
+    <!-- Configure mobile tcp buffer sizes in the form:
+         rat-name:rmem_min,rmem_def,rmem_max,wmem_min,wmem_def,wmem_max
+         If no value is found for the rat-name in use, the system default will be applied.
+    -->
+    <string-array name="config_mobile_tcp_buffers">
+        <item>5gnr:2097152,6291456,16777216,512000,2097152,8388608</item>
+        <item>lte:2097152,4194304,8388608,262144,524288,1048576</item>
+        <item>lte_ca:4096,6291456,12582912,4096,1048576,2097152</item>
+        <item>umts:4094,87380,1220608,4096,16384,1220608</item>
+        <item>hspa:4094,87380,1220608,4096,16384,1220608</item>
+        <item>hsupa:4094,87380,1220608,4096,16384,1220608</item>
+        <item>hsdpa:4094,87380,1220608,4096,16384,1220608</item>
+        <item>hspap:4094,87380,1220608,4096,16384,1220608</item>
+        <item>edge:4093,26280,35040,4096,16384,35040</item>
+        <item>gprs:4092,8760,11680,4096,8760,11680</item>
+        <item>evdo:4094,87380,524288,4096,16384,262144</item>
+    </string-array>
+
+    <!-- Flag specifying whether VoLTE is available on device -->
+    <bool name="config_device_volte_available">true</bool>
+
+    <!-- Flag specifying whether VT is available on device -->
+    <bool name="config_device_vt_available">true</bool>
+
+    <!-- Flag specifying whether WFC over IMS is available on device -->
+    <bool name="config_device_wfc_ims_available">true</bool>
+
+    <!-- IWLAN network service package name to bind to by default. If none is specified in an overlay, an
+         empty string is passed in -->
+    <string name="config_wlan_network_service_package">vendor.qti.iwlan</string>
+
+    <!-- Telephony qualified networks service package name to bind to by default. -->
+    <string name="config_qualified_networks_service_package">vendor.qti.iwlan</string>
+
+    <!-- Flag specifying whether or not IMS will use the ImsResolver dynamically -->
+    <bool name="config_dynamic_bind_ims">true</bool>
+
+    <!-- Config determines whether to update phone object when voice registration
+         state changes. Voice radio tech change will always trigger an update of
+         phone object irrespective of this config -->
+    <bool name="config_switch_phone_on_voice_reg_state_change">false</bool>
+
+    <!-- Boolean indicating if current platform supports BLE peripheral mode -->
+    <bool name="config_bluetooth_le_peripheral_mode_supported">true</bool>
+
+    <!-- Boolean indicating if current platform supports HFP inband ringing -->
+    <bool name="config_bluetooth_hfp_inband_ringing_support">true</bool>
+
+    <!-- Flag indicating if the speed up audio on mt call code should be executed -->
+    <bool name="config_speed_up_audio_on_mt_calls">true</bool>
+
+    <!-- Shutdown if the battery temperature exceeds (this value * 0.1) Celsius. -->
+    <integer name="config_shutdownBatteryTemperature">600</integer>
+
+    <!-- Operating volatage for bluetooth controller. 0 by default-->
+    <integer name="config_bluetooth_operating_voltage_mv">3300</integer>
+
+    <!-- Vibrator pattern for feedback about a long screen/key press -->
+    <integer-array name="config_longPressVibePattern">
+        <item>0</item>
+        <item>1</item>
+        <item>20</item>
+        <item>21</item>
+    </integer-array>
+
+    <!-- Vibrator pattern for feedback about touching a virtual key -->
+    <integer-array name="config_virtualKeyVibePattern">
+        <item>0</item>
+        <item>10</item>
+        <item>20</item>
+        <item>30</item>
+    </integer-array>
+
+    <!-- Vibrator pattern for a very short but reliable vibration for soft keyboard tap -->
+    <integer-array name="config_keyboardTapVibePattern">
+        <item>40</item>
+    </integer-array>
+
+    <!-- Default list of files pinned by the Pinner Service -->
+    <string-array translatable="false" name="config_defaultPinnerServiceFiles">
+        <item>"/system/framework/arm64/boot-framework.oat"</item>
+        <item>"/system/framework/framework.jar"</item>
+        <item>"/system/framework/oat/arm64/services.odex"</item>
+        <item>"/system/framework/services.jar"</item>
+        <item>"/apex/com.android.art/javalib/core-oj.jar"</item>
+        <item>"/apex/com.android.art/javalib/core-libart.jar"</item>
+        <item>"/apex/com.android.media/javalib/updatable-media.jar"</item>
+        <item>"/system_ext/priv-app/SystemUI/SystemUI.apk"</item>
+        <item>"/system_ext/priv-app/SystemUI/oat/arm64/SystemUI.odex"</item>
+        <item>"/system/lib64/libsurfaceflinger.so"</item>
+    </string-array>
+
+    <!-- Should the pinner service pin the Camera application? -->
+    <bool name="config_pinnerCameraApp">true</bool>
+
+    <!-- Should the pinner service pin the Home application? -->
+    <bool name="config_pinnerHomeApp">true</bool>
+
+    <!-- List of files pinned by the Pinner Service with the JIT Zygote boot image b/119800099 -->
+    <string-array translatable="false" name="config_jitzygoteBootImagePinnerServiceFiles">
+        <item>"/system/framework/framework.jar"</item>
+        <item>"/system/framework/services.jar"</item>
+        <item>"/apex/com.android.art/javalib/core-oj.jar"</item>
+        <item>"/apex/com.android.art/javalib/core-libart.jar"</item>
+        <item>"/apex/com.android.media/javalib/updatable-media.jar"</item>
+        <item>"/system_ext/priv-app/SystemUI/SystemUI.apk"</item>
+        <item>"/system/lib64/libsurfaceflinger.so"</item>
+    </string-array>
+
+    <!-- Whether a software navigation bar should be shown. NOTE: in the future this may be
+         autodetected from the Configuration. -->
+    <bool name="config_showNavigationBar">true</bool>
+
+    <!-- When true use the linux /dev/input/event subsystem to detect the switch changes
+         on the headphone/microphone jack. When false use the older uevent framework. -->
+    <bool name="config_useDevInputEventForAudioJack">true</bool>
+
+    <!-- Is the notification LED intrusive? Used to decide if there should be a disable option -->
+    <bool name="config_intrusiveNotificationLed">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>
+
+    <!-- Is the device capable of hot swapping an ICC Card -->
+    <bool name="config_hotswapCapable">true</bool>
+
+    <!-- Whether the Unprocessed audio source supports the required frequency range and level -->
+    <bool name="config_supportAudioSourceUnprocessed">true</bool>
+
+    <!-- True if the device supports Sustained Performance Mode-->
+    <bool name="config_sustainedPerformanceModeSupported">true</bool>
+
+    <!-- Whether device supports double tap to wake -->
+    <bool name="config_supportDoubleTapWake">true</bool>
+
+    <!-- Boolean indicating whether the HWC setColorTransform function can be performed efficiently
+         in hardware. -->
+    <bool name="config_setColorTransformAccelerated">true</bool>
+
+    <!-- List of biometric sensors on the device, in decreasing strength. Consumed by AuthService
+         when registering authenticators with BiometricService. Format must be ID:Modality:Strength,
+         where: IDs are unique per device, Modality as defined in BiometricAuthenticator.java,
+         and Strength as defined in Authenticators.java -->
+    <string-array name="config_biometric_sensors" translatable="false" >
+        <item>0:2:15</item> <!-- ID0:Fingerprint:Strong -->
+    </string-array>
+</resources>
diff --git a/overlay/packages/services/Telephony/res/values/config.xml b/overlay/packages/services/Telephony/res/values/config.xml
new file mode 100644
index 0000000..7a10cc8
--- /dev/null
+++ b/overlay/packages/services/Telephony/res/values/config.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2009 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<!-- NOTE: Many variables that used to be in this file have been migrated to
+     CarrierConfigManager.java. Please consider whether new variables belong
+     there before adding to this file. Variables here should be more closely
+     related to devices than to networks. -->
+
+<!-- Phone app resources that may need to be customized
+     for different hardware or product builds. -->
+<resources>
+    <!-- Flag indicating if hac is enabled -->
+    <bool name="hac_enabled">true</bool>
+
+    <!-- Show enabled lte option for lte device -->
+    <bool name="config_enabled_lte" translatable="false">true</bool>
+
+    <!-- String indicating the package name of the device ImsService implementation for MMTEL. -->
+    <string name="config_ims_mmtel_package" translatable="false">org.codeaurora.ims</string>
+
+    <!-- String indicating the package name of the device ImsService implementation for RCS. -->
+    <string name="config_ims_rcs_package" translatable="false">org.codeaurora.ims</string>
+</resources>