diff --git a/src/main/java/com/safeqr/app/qrcode/entity/PhoneEntity.java b/src/main/java/com/safeqr/app/qrcode/entity/PhoneEntity.java
index 863f24b..d240895 100644
--- a/src/main/java/com/safeqr/app/qrcode/entity/PhoneEntity.java
+++ b/src/main/java/com/safeqr/app/qrcode/entity/PhoneEntity.java
@@ -2,6 +2,7 @@ package com.safeqr.app.qrcode.entity;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import jakarta.persistence.*;
 import lombok.AllArgsConstructor;
 import lombok.Data;
@@ -30,4 +31,8 @@ public class PhoneEntity {
     private UUID qrCodeId;
 
     private String phone;
+
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
+    @Column(name = "remarks")
+    private String remarks;
 }
diff --git a/src/main/java/com/safeqr/app/qrcode/model/PhoneModel.java b/src/main/java/com/safeqr/app/qrcode/model/PhoneModel.java
index 9d59c50..c939703 100644
--- a/src/main/java/com/safeqr/app/qrcode/model/PhoneModel.java
+++ b/src/main/java/com/safeqr/app/qrcode/model/PhoneModel.java
@@ -38,6 +38,6 @@ public final class PhoneModel extends QRCodeModel<PhoneEntity> {
     }
     @Override
     public String retrieveClassification() {
-        return "";
+        return phoneVerificationService.checkPhoneNumber(details);
     }
 }
\ No newline at end of file
diff --git a/src/main/java/com/safeqr/app/qrcode/service/PhoneVerificationService.java b/src/main/java/com/safeqr/app/qrcode/service/PhoneVerificationService.java
index e20fa59..5d28967 100644
--- a/src/main/java/com/safeqr/app/qrcode/service/PhoneVerificationService.java
+++ b/src/main/java/com/safeqr/app/qrcode/service/PhoneVerificationService.java
@@ -11,6 +11,8 @@ import org.springframework.stereotype.Service;
 
 import java.util.UUID;
 
+import static com.safeqr.app.constants.CommonConstants.*;
+
 @Service
 public class PhoneVerificationService {
     private final PhoneRepository phoneRepository;
@@ -48,4 +50,30 @@ public class PhoneVerificationService {
 
     }
 
+    public String checkPhoneNumber(PhoneEntity phoneEntity) {
+        // Remove any spaces, dashes, parentheses, and trim the ends
+        String phoneNumber = phoneEntity.getPhone().replaceAll("[\\s\\-()]", "").trim();
+
+        // Check if the number starts with +65 or just 65
+        if (phoneNumber.startsWith("+65")) {
+            phoneNumber = phoneNumber.substring(3);  // Remove the "+65"
+        } else if (phoneNumber.startsWith("65")) {
+            phoneNumber = phoneNumber.substring(2);  // Remove the "65"
+        }
+
+        // Check if it's a valid Singapore mobile or landline number
+        if (phoneNumber.matches("^[689]\\d{7}$")) {
+            if (phoneNumber.startsWith("8") || phoneNumber.startsWith("9")) {
+                phoneEntity.setRemarks("Singapore mobile number - This number has not been scanned for scam. Please do not divulge your personal information.");
+            } else if (phoneNumber.startsWith("6")) {
+                phoneEntity.setRemarks("Singapore landline number - This phone number has not been scanned for scam. Please do not divulge your personal information.");
+            }
+            return CLASSIFY_UNKNOWN;
+        }
+
+        // If it doesn't match mobile or landline pattern
+        phoneEntity.setRemarks("Warning: This is either an overseas number or an invalid Singapore number. Please exercise caution.");
+        return CLASSIFY_WARNING;
+    }
+
 }
\ No newline at end of file
diff --git a/src/main/java/com/safeqr/app/qrcode/service/SMSVerificationService.java b/src/main/java/com/safeqr/app/qrcode/service/SMSVerificationService.java
index 3e72015..606f671 100644
--- a/src/main/java/com/safeqr/app/qrcode/service/SMSVerificationService.java
+++ b/src/main/java/com/safeqr/app/qrcode/service/SMSVerificationService.java
@@ -2,6 +2,7 @@ package com.safeqr.app.qrcode.service;
 
 import com.safeqr.app.exceptions.InvalidFormatExceptions;
 import com.safeqr.app.exceptions.ResourceNotFoundExceptions;
+import com.safeqr.app.qrcode.entity.PhoneEntity;
 import com.safeqr.app.qrcode.entity.SMSEntity;
 import com.safeqr.app.qrcode.repository.SMSRepository;
 import org.slf4j.Logger;
@@ -12,8 +13,7 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.util.*;
 
-import static com.safeqr.app.constants.CommonConstants.CLASSIFY_SAFE;
-import static com.safeqr.app.constants.CommonConstants.CLASSIFY_WARNING;
+import static com.safeqr.app.constants.CommonConstants.*;
 
 @Service
 public class SMSVerificationService {
@@ -84,7 +84,6 @@ public class SMSVerificationService {
             throw new InvalidFormatExceptions("Invalid SMSTO format. Expected format: SMSTO:<phone>:<message>");
         }
     }
-    @Transactional
     public String getClassification (SMSEntity smsEntity) {
 
         String lowerCaseSms = smsEntity.getMessage().toLowerCase();
@@ -105,8 +104,28 @@ public class SMSVerificationService {
             }
         }
 
-        // If no phishing keywords are found
-        return CLASSIFY_SAFE;
+        // If no phishing keywords are found, sent for local phone number checks
+        return checkPhoneNumber(smsEntity.getPhone());
+    }
+
+    private String checkPhoneNumber(String  phoneNumber) {
+        // Remove any spaces, dashes, parentheses, and trim the ends
+        phoneNumber = phoneNumber.replaceAll("[\\s\\-()]", "").trim();
+
+        // Check if the number starts with +65 or just 65
+        if (phoneNumber.startsWith("+65")) {
+            phoneNumber = phoneNumber.substring(3);  // Remove the "+65"
+        } else if (phoneNumber.startsWith("65")) {
+            phoneNumber = phoneNumber.substring(2);  // Remove the "65"
+        }
+
+        // Check if it's a valid Singapore mobile or landline number
+        if (phoneNumber.matches("^[689]\\d{7}$") && (phoneNumber.startsWith("8") || phoneNumber.startsWith("9"))) {
+                return CLASSIFY_SAFE;
+        }
+
+        // If it doesn't match mobile
+        return CLASSIFY_UNSAFE;
     }
 
 }
\ No newline at end of file