my device was rooted i have unrooted it and i want to update it but my tablet samsung galaxy tab 3 SM-T211 7.0 inch is telling again and again when i click to software update it shows the message. Your device have been modified in unauthories way and when in tried with samsung kies and kies 3 on pc it failed and it have told that it will update from smart switch when i tried to update it failed and told that image error . please as possible as reply it fast