diff --git a/pySim/esim/saip/personalization.py b/pySim/esim/saip/personalization.py
index 23251577..8ad52312 100644
--- a/pySim/esim/saip/personalization.py
+++ b/pySim/esim/saip/personalization.py
@@ -115,6 +115,7 @@ class ConfigurableParameter:
     min_len = None
     max_len = None
     allow_len = None # a list of specific lengths
+    default_value = None
 
     def __init__(self, input_value=None):
         self.input_value = input_value # the raw input value as given by caller
@@ -316,6 +317,7 @@ class Iccid(DecimalParam):
     name = 'ICCID'
     min_len = 18
     max_len = 20
+    default_value = '0' * 18
 
     @classmethod
     def validate_val(cls, val):
@@ -336,6 +338,7 @@ class Imsi(DecimalParam):
     name = 'IMSI'
     min_len = 6
     max_len = 15
+    default_value = '00101' + ('0' * 10)
 
     @classmethod
     def apply_val(cls, pes: ProfileElementSequence, val):
@@ -495,6 +498,7 @@ class Puk(DecimalHexParam):
     allow_len = 8
     rpad = 16
     keyReference = None
+    default_value = '0' * allow_len
 
     @classmethod
     def apply_val(cls, pes: ProfileElementSequence, val):
@@ -521,6 +525,7 @@ class Pin(DecimalHexParam):
     rpad = 16
     min_len = 4
     max_len = 8
+    default_value = '0' * max_len
     keyReference = None
 
     @staticmethod
@@ -544,9 +549,10 @@ class Pin(DecimalHexParam):
 
 class Pin1(Pin):
     name = 'PIN1'
+    default_value = '0' * 4  # PIN are usually 4 digits
     keyReference = 0x01
 
-class Pin2(Pin):
+class Pin2(Pin1):
     name = 'PIN2'
     keyReference = 0x81
 
@@ -566,7 +572,7 @@ class Adm1(Pin):
     name = 'ADM1'
     keyReference = 0x0A
 
-class Adm2(Pin):
+class Adm2(Adm1):
     name = 'ADM2'
     keyReference = 0x0B
 
@@ -589,6 +595,7 @@ class AlgoConfig(ConfigurableParameter):
 class AlgorithmID(DecimalParam, AlgoConfig):
     algo_config_key = 'algorithmID'
     allow_len = 1
+    default_value = 1  # Milenage
 
     @classmethod
     def validate_val(cls, val):
@@ -604,6 +611,7 @@ class K(BinaryParam, AlgoConfig):
     name = 'K'
     algo_config_key = 'key'
     allow_len = 128 // 8 # length in bytes (from BinaryParam)
+    default_value = '00' * allow_len
 
 class Opc(K):
     name = 'OPc'
@@ -616,6 +624,7 @@ class MilenageRotationConstants(BinaryParam, AlgoConfig):
     name = 'MilenageRotation'
     algo_config_key = 'rotationConstants'
     allow_len = 5 # length in bytes (from BinaryParam)
+    default_value = '0a 0b 0c 0d 0e'
 
     @classmethod
     def validate_val(cls, val):
@@ -639,6 +648,7 @@ class MilenageXoringConstants(BinaryParam, AlgoConfig):
     name = 'MilenageXOR'
     algo_config_key = 'xoringConstants'
     allow_len = 80 # length in bytes (from BinaryParam)
+    default_value = ' '.join(('00' * 16,) * 5)
 
 class TuakNumberOfKeccak(IntegerParam, AlgoConfig):
     """Number of iterations of Keccak-f[1600] permutation as recomended by Section 7.2 of 3GPP TS 35.231"""
@@ -646,3 +656,4 @@ class TuakNumberOfKeccak(IntegerParam, AlgoConfig):
     algo_config_key = 'numberOfKeccak'
     min_val = 1
     max_val = 255
+    default_value = '1'