diff --git a/src/seedu/addressbook/Main.java b/src/seedu/addressbook/Main.java
index bc18bed7e..3ddd2b64a 100644
--- a/src/seedu/addressbook/Main.java
+++ b/src/seedu/addressbook/Main.java
@@ -126,6 +126,10 @@ private StorageFile initializeStorage(String[] launchArgs) throws InvalidStorage
         boolean isStorageFileSpecifiedByUser = launchArgs.length > 0;
         return isStorageFileSpecifiedByUser ? new StorageFile(launchArgs[0]) : new StorageFile();
     }
+    private  static void helloworld()
+    {
+        System.out.print("helloworld");
+    }
 
 
 }
diff --git a/src/seedu/addressbook/commands/FindByPhone.java b/src/seedu/addressbook/commands/FindByPhone.java
new file mode 100644
index 000000000..03136e8a1
--- /dev/null
+++ b/src/seedu/addressbook/commands/FindByPhone.java
@@ -0,0 +1,47 @@
+package seedu.addressbook.commands;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import seedu.addressbook.data.person.ReadOnlyPerson;
+
+public class FindByPhone extends Command
+{
+    public static final String COMMAND_WORD = "find by phone number";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + "Finds all persons whose phone number is" + "the specified keywords (case-sensitive) and displays them as a list with index numbers.\n"+ "Parameters: KEYWORD [MORE_KEYWORDS]...\n"+ "Example" + COMMAND_WORD + "alice";
+
+    private final Set<String> keywords;
+
+    public FindByPhone(Set<String> keywords)
+    {
+        this.keywords = keywords;
+    }
+
+    public Set<String> getKeywords()
+    {
+        return new HashSet<>(keywords);
+    }
+
+    public CommandResult execute()
+    {
+        final List<ReadOnlyPerson> personsFound = getPersonsWithNameContainingAnyKeyword(keywords);
+        return new CommandResult(getMessageForPersonListShownSummary(personsFound), personsFound);
+    }
+
+    private List<ReadOnlyPerson> getPersonsWithNameContainingAnyKeyword(Set<String> keywords)
+    {
+        final List<ReadOnlyPerson> matchedPersons = new ArrayList<>();
+        for (ReadOnlyPerson person : addressBook.getAllPersons()) {
+            final Set<String> PhoneNumber = new HashSet<>(person.getPhone().getPhone());
+            if (!Collections.disjoint(PhoneNumber, keywords)) {
+                matchedPersons.add(person);
+            }
+        }
+        return matchedPersons;
+    }
+
+}
diff --git a/src/seedu/addressbook/data/AddressBook.java b/src/seedu/addressbook/data/AddressBook.java
index 537d35c89..a87489ef7 100644
--- a/src/seedu/addressbook/data/AddressBook.java
+++ b/src/seedu/addressbook/data/AddressBook.java
@@ -74,4 +74,8 @@ public boolean equals(Object other) {
                 || (other instanceof AddressBook // instanceof handles nulls
                         && this.allPersons.equals(((AddressBook) other).allPersons));
     }
+    private  static void helloworld()
+    {
+        System.out.print("helloworld");
+    }
 }
diff --git a/src/seedu/addressbook/data/person/Person.java b/src/seedu/addressbook/data/person/Person.java
index 64551c7fe..6af906ba2 100644
--- a/src/seedu/addressbook/data/person/Person.java
+++ b/src/seedu/addressbook/data/person/Person.java
@@ -61,6 +61,7 @@ public Address getAddress() {
     public Set<Tag> getTags() {
         return new HashSet<>(tags);
     }
+    
 
     /**
      * Replaces this person's tags with the tags in the argument tag set.
diff --git a/src/seedu/addressbook/data/person/Phone.java b/src/seedu/addressbook/data/person/Phone.java
index 431a7a882..75fd1bcd7 100644
--- a/src/seedu/addressbook/data/person/Phone.java
+++ b/src/seedu/addressbook/data/person/Phone.java
@@ -2,6 +2,9 @@
 
 import seedu.addressbook.data.exception.IllegalValueException;
 
+import java.util.Arrays;
+import java.util.List;
+
 /**
  * Represents a Person's phone number in the address book.
  * Guarantees: immutable; is valid as declared in {@link #isValidPhone(String)}
@@ -35,6 +38,9 @@ public Phone(String phone, boolean isPrivate) throws IllegalValueException {
     public static boolean isValidPhone(String test) {
         return test.matches(PHONE_VALIDATION_REGEX);
     }
+    public List<String> getPhone() {
+        return Arrays.asList(value.split("\\s+"));
+    }
 
     @Override
     public String toString() {