Change WhatsApp Account Phone Number

Please follow these steps to change account phone number in WhatsApp
Make sure new phone number can receive SMS or calls

Open WhatsApp
Press Menu Button

 

Press Settings

Press Account

Press Change number

Press NEXT

Enter old and new phone number along with country code and Press DONE 

Enter verification code received by SMS/call

You will get confirmation message, Press OK

Delete Telegram Contact

Open Telegram

Click Contacts and start chat whom you want to delete

Click contact profile picture

Click three dots on top right

Click Delete

Click OK