I have purchased a cell phone of make 07W38, model K510iof sony ericsson on 23.11.2007 from a dealer of Bhubaneswar, Orissa. During opening the sealed packet it was noticed that the rear cover was not tightly fitted withe cabinet. Inspite of my discontentment the dealer compelled me to take the defective piece. then i rush to the local service centre of Sony Ericsson. They impressed me that, the rear cover is not covered under warrenty. then after 7 days I found that, some ringtones are noy playing. The service center reloaded the the soft ware, but again afer 12 days the same problem was noticed. Similar action was taken by the local service people, but they have mishandled the set and the power botton became in a pressed condition. I donot have faith on the local service people. Please address the problem with a senior Technical personnel and change the rear cover to fit fightly with the cabinet and ensure no such software problen in future.