cell-force.in operates via www.ebay.in as a seller for Blackberry phones. He claims to provide unlocked Blackberry phones from Sprint. BEWARE...these phones comes with an ancient software on which basic GPRS will work but BB services will not, when you will upgrade the software the phone will be hard-locked and will become a basic phone only and Internet services will stop completely forever.
When you go back to him for a replacement/refund, he will say that phone stopped to work as you did something in that. Even Ebay doesnt seems to be towards the Buyer's side.
People BEWARE of this seller.
He did the same with me and is still selling more phones on Ebay.in

I am waiting for a resolution from Ebay, else will be filing a case in court.

He will also provide an invoice that will be just half of the amount that he charge in actual. That makes him a guilty for sales tax team as well.

I am holding my horses for sometime, he will reap the results soon.