For a day now I've been trying to figure out the way around my problem and I couldn't. But I'm just a beginner, I hope you guys can help.
short version: After official OTA update my stock, unrooted GT-I9300 boots only until one of the logo screens. I want badly to keep apps data, especially sms'es and voice recorder files. Downloading the update via KIES in download mode repeats update procedure but then again the boot ends on samsung logo screen (the one with just 'samsung' letters if that matters).
longer version: I've been using stock ROM forever and lived happily with stock ROM on Android 4.3 (except for laaags) Yesterday I went to check if an update is available - it was, so I downloaded it. It was all fine, I got to 'optimizing app 222/222' screen then the phone rebooted. It went through GT-I9300 screen, carrier screen, and in the end it stuck on pulsing LED and letters on the screen: 'SAMSUNG'. And now it happens each time I turn the phone on. I can still go to download mode easily and to recovery mode too.
I've reinstalled the update used KIES (188.8.131.5244_14) with the phone in download mode but that gets me to the same place (optimizes all 222 aps, reboots and hangs up at the same sceen).
Is there a way to have this fixed while keeping apps data?
this thread gives me hope there is, since there are 'NO WIPE' files, but sadly this one is only for US Verizon, not international..
(as a newb I can't post links but it's there) - s3forums site, thread galaxy-s3-hacking-mods/3292-guide-unbrick-restore-your-galaxy-s3-back-100-stock
Samsung Galaxy S III GT-I9300 (International), carrier - Orange Poland
Android 4.3, no root, Stock ROM