My phone suffered problems while installing the update. On automatic booting after update installation started, there was some issue, all sms messages and call histroy disappeared. The phone suggested that there was a serious error me to do a factory reset to recover from the error. After doing factory reset and restoring latest Google backup, sms messages are still lost. Rest of data is ok.
When I factory reset my device was on April patch....When I factory reset and install everything like contact image and all . I checked for update then I again downloaded may patch and then tap on restart...this time it installed.
My phone did not update to may security update eventually. I had to do a factory reset and restore. I am planning to wait for few more days before attempting to update again. I can even opt not to update may security patch and directly jump to June security patch that will be released next month.