NRI Account which don't need to take delivery?!

Can Someone please guide me which NRI Trading Account allows you to buy/sell the shares same day?

So We don't have to take the delivery?

What I have found is let's say i buy reliance at 1000 today and if it plummets in next 3 days to 900. NRI trading account you can't sell it before 3 days.

Any suggestion/Advise?

Nobody knows!

P.I.S. Extension letter for NRI

can Anyone confirm that it allows to have two different brokers with only one PIS Account?

An NRI can have only one PIS account with any bank designated by RBI. If you already have an account with a broker, probably you can contact the other broker with whom you want open an account to enquire about such rules and regulations.