diff --git a/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst b/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst
index 4d81066e6c3a..4ec7de171670 100644
--- a/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst
+++ b/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst
@@ -455,6 +455,8 @@ Modem libraries
 
   * Added the :c:func:`pdn_dynamic_params_get_v6` function to get PDN parameters for IPv6-only.
 
+* Updated the :ref:`nrf_modem_lib_lte_net_if` to automatically set the actual link :term:`Maximum Transmission Unit (MTU)` on the network interface when PDN connectivity is gained.
+
 Multiprotocol Service Layer libraries
 -------------------------------------
 
diff --git a/lib/nrf_modem_lib/lte_net_if/lte_net_if.c b/lib/nrf_modem_lib/lte_net_if/lte_net_if.c
index 15476b1a400b..5ac78e85a6b3 100644
--- a/lib/nrf_modem_lib/lte_net_if/lte_net_if.c
+++ b/lib/nrf_modem_lib/lte_net_if/lte_net_if.c
@@ -60,13 +60,29 @@ void lte_net_if_modem_fault_handler(void)
 	net_if_dormant_on(iface_bound);
 }
 
+static uint16_t pdn_mtu(void)
+{
+	unsigned int mtu = 0;
+	int rc;
+
+	rc = pdn_dynamic_params_get(0, NULL, NULL, &mtu);
+	if ((rc != 0) || (mtu == 0)) {
+		LOG_WRN("MTU query failed, error: %d, MTU: %d", rc, mtu);
+		/* Fallback to the minimum value that IPv4 is required to support */
+		mtu = NET_IPV4_MTU;
+	}
+	LOG_DBG("Network MTU: %d", mtu);
+	return mtu;
+}
+
 /* Called when we detect LTE connectivity has been gained.
  *
- * Marks the iface as active and cancels any pending timeout.
+ * Queries the network MTU, marks the iface as active, and cancels any pending timeout.
  */
 static void become_active(void)
 {
 	LOG_DBG("Becoming active");
+	net_if_set_mtu(iface_bound, pdn_mtu());
 	net_if_dormant_off(iface_bound);
 	k_work_cancel_delayable(&connection_timeout_work);
 }
diff --git a/lib/nrf_modem_lib/nrf9x_sockets.c b/lib/nrf_modem_lib/nrf9x_sockets.c
index a593b22222f0..da8c84266366 100644
--- a/lib/nrf_modem_lib/nrf9x_sockets.c
+++ b/lib/nrf_modem_lib/nrf9x_sockets.c
@@ -1168,7 +1168,7 @@ static struct offloaded_if_api nrf9x_iface_offload_api = {
 	.enable = nrf9x_iface_enable,
 };
 
-/* TODO Get the actual MTU for the nRF9x LTE link. */
+/* Actual MTU for the nRF9x LTE link is handled by `lte_net_if.c` */
 NET_DEVICE_OFFLOAD_INIT(nrf9x_socket, "nrf9x_socket",
 			nrf9x_socket_offload_init,
 			NULL,