If you change a telecom, you don’t have to change your number because if you have to change your number, new telecom would not be able to compete with old telecoms. When I was a child the ATMs only allow you to withdraw cash if you have a card from the same bank. Again, the new banks have no place to set up ATM until the government stepped in and say to foster competition, we actually need interbank protocol so that you can withdraw cash across the different banks.