Dear friends
i am using "sony ericsson vivaz"
first time i had install some "sys" files and "jar" files, but now i can't install sys files,now installing jar files and java files only,
getting tow type error messages, if the mobile date is correct "certificate expired" when i am changing time to back certificate may not yet be valid,is expired or the phone date set may be incorrect"
i am already done formating phone,memory card and updating.
How can i solve this problem?
