HDFC earlier it was 24 hours.Now its 12 hours.HDFC, I believe, has a 1 day restriction. Banks like ICICI do not have any restriction. You can add a beneficiary and then transfer immediately.
I guess thats enough.2-3 times one get sms of this addition and is sure account is not hacked with this restriction stuff.5 Days is too much.
ICICI doing it immediate is good but its just like debit card ,if you loose password you are gone immediately.Though for a wise trouble maker its not a big deal too do the same with HDFC also(Changing mobile number)