My apple id and password both are correct even i can log in from another iphone but my iphone require activation and its showing this id nd password can not be used to activate this phone what can i do???

Are you the original owner of the iPhone? When it asks for the ID and password, this is the iCloud ID and password, which could be different than your Apple ID and password. If the ID that shows (partially) does not look familiar, then it is possible this is someone else's ID, especially if you are not the originl owner of the device. Did you purchase this device used?