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Check the file format of the application if it's compatible or not.
try to download here : http://phone.mobile9.com/i/sony+ericsson+k800/
If you still got error on installing the applications,try to reset the phone. Go to settings > Master reset and choose if you want to reset only the settings or the entire phone,if ask for a code,the default will be 0000,but if you change the code before,enter your desire code and after that the phone will restart and it will go back to its original settings.
Hello, when I want to start my games or applications folder on my Sony Ericsson K800i I get this mesage "Operation failed" can anyone please help me to solve this I want to play games & I want my phone full working.....help please
i could not open my game and application, it will display operation failed, and then i try to reformat it, but it is not work. please help my problem. games and applications are not open, if try to open that shown operation failed! how to solve this problem? please help vaen okay
Yeah I'm having the same porblem. When i try to start any applications or games menu i get a pop up saying application failed. I'v formatted both my memory card and phone memory and reset the phone but to no avail> ARGGGGHHHH!!!
Can someone please send me the solution and if it iis a recurring problem in many K800is will i get my money back?