Does Whatsapp require verification after Factory Reset? I recently had a problem with my Samsung S7 edge. It keeps on restarting and after removing cache, it still restarts after a few minutes. I found out that the most effective way to fix it is a factory reset. The problem is that, I am overseas and I could not receive any calls or text. Hence, I would not be able to verify my Whatsapp number. 

Does anyone know whether Whatsapp requires verification after factory reset or does anyone know how to fix the problem? 

Thank you!
Yes it will require verification, and you will need to be able to receive a text to verify your number with WhatsApp.  If your device/carrier has the ability to send/receive texts over wifi, that may be an option for you to verify your number.

Per WhatsApp's FAQ Page here:


  Requirements
  
  
  You can only verify a phone number you own.
  You must be able to receive phone calls and SMS to the phone number you are  trying to verify.
  You must have any call-blocking settings, apps or task killers disabled.
  You must have a working Internet connection through mobile data or Wi-Fi. If you are roaming or have a bad connection, verification may
  not work. Try opening www.whatsapp.com on your phone’s Internet
  browser to see if you are connected to the Internet.
  
  
  If you didn't receive the 6-digit code by SMS
  
  
  If the timer runs out before you receive the code, an option will appear to request a phone call. Choose the Call me option to request
  the call. When you answer the call, an automated voice should tell you
  the 6-digit code. Insert that to verify WhatsApp.