diff --git a/pySim-read.py b/pySim-read.py
index a4f15f8..3e19a02 100755
--- a/pySim-read.py
+++ b/pySim-read.py
@@ -256,14 +256,20 @@
 				print("EHPLMN:\n%s" % (res))
 			else:
 				print("EHPLMN: Can't read, response code = %s" % (sw,))
+
 		# EF.UST
-		(res, sw) = card.read_binary(EF_USIM_ADF_map['UST'])
-		if sw == '9000':
-			print("USIM Service Table: %s" % res)
-			# Print those which are available
-			print("%s" % dec_st(res, table="usim"))
-		else:
-			print("USIM Service Table: Can't read, response code = %s" % (sw,))
+		try:
+			if card.file_exists(EF_USIM_ADF_map['UST']):
+				# res[0] - EF content of UST
+				# res[1] - Human readable format of services marked available in UST
+				(res, sw) = card.read_ust()
+				if sw == '9000':
+					print("USIM Service Table: %s" % res[0])
+					print("%s" % res[1])
+				else:
+					print("USIM Service Table: Can't read, response code = %s" % (sw,))
+		except Exception as e:
+			print("USIM Service Table: Can't read file -- " + str(e))
 
 		#EF.ePDGId - Home ePDG Identifier
 		try:
diff --git a/pySim/cards.py b/pySim/cards.py
index f2f79e4..a67540f 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -277,6 +277,14 @@
 						EF_USIM_ADF_map['ePDGId'], epdgid_tlv)
 		return sw
 
+	def read_ust(self):
+		(res, sw) = self._scc.read_binary(EF_USIM_ADF_map['UST'])
+		if sw == '9000':
+			# Print those which are available
+			return ([res, dec_st(res, table="usim")], sw)
+		else:
+			return ([None, None], sw)
+
 
 class _MagicSimBase(Card):
 	"""
@@ -772,7 +780,7 @@
 			data, sw = self._scc.update_record('6F40', 1, data, force_len=True)
 
 
-class FairwavesSIM(Card):
+class FairwavesSIM(UsimCard):
 	"""
 	FairwavesSIM
 
@@ -961,7 +969,7 @@
 		# write EF.IMSI
 		data, sw = self._scc.update_binary('6f07', enc_imsi(p['imsi']))
 
-class WavemobileSim(Card):
+class WavemobileSim(UsimCard):
 	"""
 	WavemobileSim