I am using Magento 1.9.0.1 . I have customer data for my site. Previously I was collecting 12 digit telephone/mobile number while registration i.e. 91xxxxxxxxxx
But because of some reason, from now, I will collect customer numbers only of 10 digits i.e. without 91
So I want to remove 91 from all customer's telephone number from database tables
I do not have any idea where customer telephone numbers are present in Magento database tables