No Issues at all, just remember from next time, you dont need to change your esn, just change the registered esn of old phone and copy it in the new one and copy paste the MIN as well, just like Cut-Paste. You will never need to go to tata Hub for activation.
Also make sure to write down your current MIN and keep it handy as it doesnt change and OTAF wont update your MIN due to some technical issues with Tata OTA.
Check your mail as well.
@ Parin Bhai
Thanks, I have been helped by gurus millions, billions, zillion times, this is nothing that I am giving in return