diff --git a/radio/1.1/IRadio.hal b/radio/1.1/IRadio.hal
index c2bfa53..44b08fe 100644
--- a/radio/1.1/IRadio.hal
+++ b/radio/1.1/IRadio.hal
@@ -51,4 +51,34 @@
      */
      oneway setCarrierInfoForImsiEncryption(int32_t serial, vec<uint8_t> carrierKey,
              string keyIdentifier);
+
+    /**
+     * Set SIM card power state.
+     * Request is equivalent to inserting or removing the card.
+     *
+     * The radio modem must generate IRadioIndication.simStatusChanged() as if the SIM had been
+     * inserted or removed.
+     *
+     * @param serial Serial number of request
+     * @param powerUp POWER_DOWN if powering down the SIM card,
+     *                POWER_UP if powering up the SIM card,
+     *                POWER_UP_PASS_THROUGH if powering up the SIM card in pass through mode.
+     * When SIM card is in POWER_UP_PASS_THROUGH, the modem does not send any command to it
+     * (for example SELECT of MF, or TERMINAL CAPABILITY), and the SIM card is controlled
+     * completely by Telephony sending APDUs directly. The SIM card state must be
+     * RIL_CARDSTATE_PRESENT and the number of card apps will be 0.
+     * No new error code is generated. Emergency calls are supported in the same way as if the
+     * SIM card is absent.
+     * POWER_UP_PASS_THROUGH mode is valid only for the specific card session where it is activated,
+     * and normal behavior occurs at the next SIM initialization, unless POWER_UP_PASS_THROUGH mode
+     * is requested again.
+     * The device is required to power down the SIM card before it can switch the mode between
+     * POWER_UP and POWER_UP_PASS_THROUGH.
+     * At device power up, the SIM interface is powered up automatically. Each subsequent request
+     * to this method is processed only after the completion of the previous one.
+     *
+     * Response callback is IRadioResponse.setSimCardPowerResponse_1_1()
+     */
+    oneway setSimCardPower_1_1(int32_t serial, CardPowerState powerUp);
+
 };