diff --git a/pySim/ts_31_102.py b/pySim/ts_31_102.py
index cefc9d4..267008d 100644
--- a/pySim/ts_31_102.py
+++ b/pySim/ts_31_102.py
@@ -270,7 +270,7 @@
 
 from pySim.filesystem import *
 from pySim.ts_51_011 import EF_IMSI, EF_xPLMNwAcT, EF_SPN, EF_CBMI, EF_ACC, EF_PLMNsel, EF_AD
-from pySim.ts_51_011 import EF_CBMID, EF_ECC, EF_CBMIR
+from pySim.ts_51_011 import EF_CBMID, EF_CBMIR
 
 import pySim.ts_102_221
 
@@ -460,6 +460,12 @@
             """Deactivate a service within EF.UST"""
             self._cmd.card.update_ust(int(arg), 0)
 
+# TS 31.103 Section 4.2.7 - *not* the same as DF.GSM/EF.ECC!
+class EF_ECC(LinFixedEF):
+    def __init__(self, fid='6fb7', sfid=0x01, name='EF.ECC',
+                 desc='Emergency Call Codes'):
+        super().__init__(fid, sfid=sfid, name=name, desc=desc, rec_len={4,20})
+
 class DF_USIM_5GS(CardDF):
     def __init__(self, fid='5FC0', name='DF.5GS', desc='5GS related files'):
         super().__init__(fid=fid, name=name, desc=desc)
@@ -472,7 +478,7 @@
           TransparentEF('4F05', None, 'EF.5GAUTHKEYS', '5G authentication keys', size={68, None}),
           TransparentEF('4F06', None, 'EF.UAC_AIC', 'UAC Access Identities Configuration', size={4, 4}),
           EF_SUCI_Calc_Info(), #TransparentEF('4F07', None, 'EF.SUCI_Calc_Info', 'SUCI Calculation Information', size={2, None}),
-          TransparentEF('4F08', None, 'EF.OPL5G', '5GS Operator PLMN List', size={10, None}),
+          LinFixedEF('4F08', None, 'EF.OPL5G', '5GS Operator PLMN List', rec_len={10, None}),
           # TransparentEF('4F09', None, 'EF.NSI', 'Network Specific Identifier'), # FFS
           TransparentEF('4F0A', None, 'EF.Routing_Indicator', 'Routing Indicator', size={4,4}),
         ]
@@ -505,7 +511,7 @@
           TransparentEF('6f7e', 0x0b, 'EF.LOCI', 'Locationn information', size={11,11}),
           EF_AD(sfid=0x03),
           EF_CBMID(sfid=0x0e),
-          EF_ECC(sfid=0x01),
+          EF_ECC(),
           EF_CBMIR(),
           DF_USIM_5GS(),
           ]
diff --git a/pySim/ts_31_103.py b/pySim/ts_31_103.py
index 0b0a4f1..8209845 100644
--- a/pySim/ts_31_103.py
+++ b/pySim/ts_31_103.py
@@ -124,7 +124,7 @@
         return enc_addr_tlv(json_in)
 
 # TS 31.103 Section 4.2.9
-class EF_GBABP(LinFixedEF):
+class EF_GBABP(TransparentEF):
     def __init__(self, fid='6fd5', sfid=None, name='EF.GBABP', desc='GBA Bootstrappng'):
         super().__init__(fid=fid, sfid=sfid, name=name, desc=desc)
 
diff --git a/pySim/ts_51_011.py b/pySim/ts_51_011.py
index e4a26a3..1455d8f 100644
--- a/pySim/ts_51_011.py
+++ b/pySim/ts_51_011.py
@@ -484,10 +484,11 @@
                  desc='Cell Broadcast Message Identifier for Data Download'):
         super().__init__(fid, sfid=sfid, name=name, desc=desc, size=size, rec_len=rec_len)
 
-# TS 51.011 Section 10.3.26
-class EF_ECC(LinFixedEF):
-    def __init__(self, fid='6fb7', sfid=None, name='EF.ECC', desc='Emergency Call Codes'):
-        super().__init__(fid, sfid=sfid, name=name, desc=desc, rec_len={4, 20})
+# TS 51.011 Section 10.3.27
+class EF_ECC(TransRecEF):
+    def __init__(self, fid='6fb7', sfid=None, name='EF.ECC', size={3,15}, rec_len=3,
+                 desc='Emergency Call Codes'):
+        super().__init__(fid, sfid=sfid, name=name, desc=desc, size=size, rec_len=rec_len)
 
 # TS 51.011 Section 10.3.28
 class EF_CBMIR(TransRecEF):