diff --git a/src/features/authentication/components/AuthenticationSteps/CompleteSignUp.tsx b/src/features/authentication/components/AuthenticationSteps/CompleteSignUp.tsx
index 6b63783..69a6e97 100644
--- a/src/features/authentication/components/AuthenticationSteps/CompleteSignUp.tsx
+++ b/src/features/authentication/components/AuthenticationSteps/CompleteSignUp.tsx
@@ -67,6 +67,15 @@ export const CompleteSignUp = ({
     }
   };
 
+  const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    let newValue = e.target.value;
+    if (newValue.startsWith('09')) {
+      newValue = newValue.substring(1);
+    }
+
+    setValue(newValue);
+  };
+
   return (
     <AuthenticationCard>
       <Typography variant="h5" sx={{ mb: 0.5 }}>
@@ -85,7 +94,7 @@ export const CompleteSignUp = ({
         inputRef={inputRef}
         label={t('completeSignUp.phoneNumber')}
         value={value}
-        onChange={(e) => setValue(e.target.value)}
+        onChange={handleChange}
         onBlur={handleBlur}
         error={inputError}
         helperText={inputError ? error : ''}
diff --git a/src/features/authentication/components/AuthenticationSteps/LoginRegiserForm.tsx b/src/features/authentication/components/AuthenticationSteps/LoginRegiserForm.tsx
index dceb8b5..0cb6978 100644
--- a/src/features/authentication/components/AuthenticationSteps/LoginRegiserForm.tsx
+++ b/src/features/authentication/components/AuthenticationSteps/LoginRegiserForm.tsx
@@ -53,7 +53,11 @@ export function LoginRegisterForm({
   );
 
   const handleInputChange = (event: React.ChangeEvent<HTMLInputElement>) => {
-    const newValue = event.target.value;
+    let newValue = event.target.value;
+    if (newValue.startsWith('09')) {
+      newValue = newValue.substring(1);
+    }
+
     setLoginRegisterValue(newValue);
 
     // If the new value contains only digits (or is empty), it's a phone number
diff --git a/src/features/authentication/components/ForgetPassword/ForgettedPasswordInfo.tsx b/src/features/authentication/components/ForgetPassword/ForgettedPasswordInfo.tsx
index 6000dd8..0ab10ab 100644
--- a/src/features/authentication/components/ForgetPassword/ForgettedPasswordInfo.tsx
+++ b/src/features/authentication/components/ForgetPassword/ForgettedPasswordInfo.tsx
@@ -45,7 +45,10 @@ export function ForgettedPasswordInfo({
   } = useApi(sendForgetPassCode);
 
   const handleInputChange = (event: React.ChangeEvent<HTMLInputElement>) => {
-    const newValue = event.target.value;
+    let newValue = event.target.value;
+    if (newValue.startsWith('09')) {
+      newValue = newValue.substring(1);
+    }
     setForgettedPasswordInfo(newValue);
 
     // If the new value contains only digits (or is empty), it's a phone number