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I tried to flash my k800i and everything went ok it flashed ok when i switched my phone on and put my sim inside it said "insert correct sim" card so i tried to put another sim card in it still said the same i tried 3 different types of sim cards it is all the same
someone please help
Your phone was probably unlocked by MAIN patch and when you flashed MAIN you locked it back. You must unlock it: http://www.topsony.com/forum/showthread.php?t=6329
See "How to apply the generated patches to DB2020 CID52 phones"
Yeah applying the patch should fix your phone... :)