Telephone XC 90

good day dear volvofriends, I have been the owner of an xc 90 d 5 premium since March 04. I can’t complain about anything. however, the phone makes me worry about big. the software störtz regularly off. the phone won’t be able to turn on anymore. my dealer has already made two attempts to repair the software update. but without success. after a few days the phone was broken again. I’m very desperate. maybe you have similar experiences. ngen made and can give tips to fix. many thanks to alexander