I'm planning to root my Sony Xperia P, but there's a complication. Due to issues with my telco, I currently don't have a plan - my phone is practically just a Wi-Fi device right now, and in addition I lost my phone number. I'm afraid that when I root my phone and reinstall WhatsApp, WhatsApp will not be able to verify my device, leaving me no other option than to create a new account. This is not an ideal situation because I will lose the access to my chat groups and I won't be able to use WhatsApp until I sign a new contract with a telco.
Is there a way to prevent this scenario from happening?
Sony Xperia P (LT22i) Android version 4.1.2 Build number 6.2.A.1.100