G900A Unrooted: Error -505 Downloading Facebook Messenger Fail

No matter what I seem to do, i cannot successfully install Messenger. It downloads perfectly fine, but then it fails and gives me error -505. Cant find anything about an error -505. Cleared data on google play, uninstalled its updates, cleared whole phones cache, uninstalled previous version of messenger, restarted phone, and nothing will allow me to install it. Have 3GB of free space internal.

(Excuse me for posting two different threads. Did not want either situation overlooked.)

S3 NAND Fail

Hi! My rooted S3 started to reboot randomly and suddenly one day stopped working. It's stuck on the "Samsung Galaxys3 GT-I9300" screen. I'm able to enter download mode and recovery mode. I can't use factory reset/wipe data because as soon as it starts the phone reboots.

I've tried several guides to no avail, I just can't get it to work. Kies can't see the phone, but Odin works. Even tried cleaning the power button just in case, but I think that only works for the samsung logo loop. Last thing I tried was a "GT-I9300XXEMG4_KOR_MULTI_FACTORY". This is what happens:

<ID:0/005> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> BOOTLOADER_I9300XXEMG4_1314436_REV00_user_low_ship .tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> CODE_I9300XXEMG4_1314436_REV00_user_low_ship.tar.m d5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> MODEM_I9300XXEMG4_1314436_REV00_user_low_ship.tar. md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> CSC_I9300OXAEMG4_KOR_FACTORY_user_low_ship.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/005> Odin engine v(ID:3.1005)..
<ID:0/005> File analysis..
<ID:0/005> SetupConnection..
<ID:0/005> Initialzation..
<ID:0/005> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> SingleDownload.
<ID:0/005> sboot.bin
<ID:0/005> NAND Write Start!!
<ID:0/005> FAIL!
<ID:0/005>
<ID:0/005> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
<ID:0/005> Removed!!


I'm at a loss. The phone worked flawlessly (rooted) for more than a year and suddenly this happens. Maybe when the random reboots started I could have done something, but what's done it's done. I've read that I could try changing the motherboard, but they are kinda expensive for something I don't know if it will even work. Tried different computers, USB cables, but it's always the same. I remember I had the avast anti theft app, but I don't know if this is what's preventing me from wiping the data or fixing the phone.