Note to self : How to chat yourself in WhatsApp
You can chat with your self with 3 methods that are given below so follow all the steps to chat with yourself.

Method 1:-
Step 1:- You need to save your WhatsApp contact number in your android phone so save it.
Step 2 :- After saving it, you have to refresh your WhatsApp account and then close it.
Step 3 :- Now open the “Contacts” application in your android phone and then find your “contact number”
Note:- Remember that you have to close your “Contacts application” after saving your number and then open it again after refreshing your WhatsApp.
Step 4:- After finding it, click on your contact number and then you will see 3 options i.e. “message, video call, voice call” so click on the “message” option.
Step 5:- After clicking on it, you will be redirected to your WhatsApp account with chat screen of your account so you can send anything to your own number.
After performing all these steps you will be able to chat with yourself in WhatsApp or we can say that you will be able to use note to self feature in WhatsApp.
Method 2:-
This method is very common you have to follow some simple steps to chat with yourself in WhatsApp.
Step 1:- Open your WhatsApp application and click on “3 dots” to create a group and click on “new group”.
Step 2 :- Now add any one of your contact to your group or you can also add your other number so after selecting it and then type the name of your group according to you then create that group.
Step 3 :- After creating it, remove the other participant from your group and then you will be able to use it as “note to self” feature.
So that’s all about this method.
Method 3 :-
This is a long and time taking method so if 1st method doesn’t work for you only then follow this method otherwise it can take your more time.
So first of all try 1st method and then try this method if 1st will not work