diff --git a/pySim/ts_31_102.py b/pySim/ts_31_102.py
index f347f67a..faf0f38d 100644
--- a/pySim/ts_31_102.py
+++ b/pySim/ts_31_102.py
@@ -1089,6 +1089,20 @@ class ADF_USIM(CardADF):
             (data, sw) = self._cmd.card._scc.terminal_profile(arg)
             self._cmd.poutput('SW: %s, data: %s' % (sw, data))
 
+        def do_envelope(self, arg):
+            """Send an ENVELOPE command to the card."""
+            (data, sw) = self._cmd.card._scc.envelope(arg)
+            self._cmd.poutput('SW: %s, data: %s' % (sw, data))
+
+        def do_envelope_sms(self, arg):
+            """Send an ENVELOPE command to the card."""
+            tpdu_ie = SMS_TPDU()
+            tpdu_ie.from_bytes(h2b(arg))
+            dev_ids = DeviceIdentities(decoded={'source_dev_id':'network','dest_dev_id':'uicc'})
+            sms_dl = SMSPPDownload(children=[dev_ids, tpdu_ie])
+            (data, sw) = self._cmd.card._scc.envelope(b2h(sms_dl.to_tlv()))
+            self._cmd.poutput('SW: %s, data: %s' % (sw, data))
+
 
 # TS 31.102 Section 7.3
 sw_usim = {