diff --git a/pySim/utils.py b/pySim/utils.py
index c0983847..51f29541 100644
--- a/pySim/utils.py
+++ b/pySim/utils.py
@@ -325,3 +325,25 @@ def enc_msisdn(msisdn, npi=0x01, ton=0x03):
 	bcd = rpad(swap_nibbles(msisdn), 10 * 2) # pad to 10 octets
 
 	return ('%02x' % bcd_len) + ('%02x' % npi_ton) + bcd
+
+def parse_st(st):
+	"""
+	Parses the EF S/U/IST and returns available/supported services
+	"""
+	st_bytes = [st[i:i+2] for i in range(0, len(st), 2) ]
+	avail_srvc = []
+	# Get each byte and check for available services
+	for i in range(0, len(st_bytes)):
+		# Byte i contains info about Services num (8i+1) to num (8i+8)
+		byte = int(st_bytes[i], 16)
+		# Services in each byte are in order MSB to LSB
+		# MSB - Service (8i+8)
+		# LSB - Service (8i+1)
+		for j in range(1, 9):
+			if byte&0x01 == 0x01:
+				# Byte X contains info about Services num (8X-7) to num (8X)
+				# bit = 1: service available
+				# bit = 0: service not available
+				avail_srvc.append((8*i) + j)
+			byte = byte >> 1
+	return avail_srvc