[Samsung Galaxy A3, A5, A7 (2017) Questions & Answe] Flix24:
Hi everyone,

looks like my mobile remains in bootloop (Samsung Logo) and I can’t solve it since a few days. As I didn’t find the right solution in the forum I hope that somebody of you have a clever idea what I could test.

It started that the phone rebooted every few minutes (maybe an update was running) and I couldn’t do anything. After I wiped cache and data in the recovery mode (factory reset) the mobile worked for one day. As I needed to reboot the mobile I get stucked on the screen with the Samsung logo.

As I’m still able to access download and recovery mode I tried the same procedure as written above without success. I downloaded the latest firmware (A320FLXXS5CSK1 / DBT) with samfirm (V.0.5.0) and flashed it with Odin (V3.14.1). This was successful with Odin but I waited over an hour and the mobile didn’t pass over the Samsung screen. I tried to repeat the procedure and disabled autoboot – no success even after starting samsung recovery mode and wipe cache + data. (Odin successful – installing android on mobile after reboot remains on samsung logo)

In recovery mode I see the following failures but not sure if it indicates to the root cause as I tested the recovery mode with a working SMA320FL and saw the same failures.

#fail to open recovery_cause(No such file or directory)#

#Reboot Recovery Cause is [UNKNOWN]#

E:Failed to clear BCB message: failed to find /misc partition

I had an SD card in usage. I tried it with and without: No change.

I can’t install TWRP as the phone is FRP locked and as soon as I try to install TWRP it will be blocked. As I couldn’t find a combination file with the same binary I couldn’t try the described procedure by forens1c.

https://xdaforums.com/samsung-a-series-2017/how-to/a320fl-2017-unlock-solution-frp-update-t3884971

Downgrade as far I understood is not possible due to the latest version of bootloader.

Further information:

Android 8.0

SM-A320FL

Current binary:Samsung Official

System Status: Custom

FRP Lock: On

B:5 K:3 S:3

Odin Log as example:

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<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> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<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> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/006> Added!!

<ID:0/006> Odin engine v(ID:3.1401)..

<ID:0/006> File analysis..

<ID:0/006> skip file list for home binary

<ID:0/006> param.bin

<ID:0/006> userdata.img

<ID:0/006> modem_debug.bin

<ID:0/006> Home Binary Download

<ID:0/006> Total Binary size: 3864 M

<ID:0/006> SetupConnection..

<ID:0/006> Initialzation..

<ID:0/006> Get PIT for mapping..

<ID:0/006> Firmware update start..

<ID:0/006> NAND Write Start!!

<ID:0/006> SingleDownload.

<ID:0/006> sboot.bin

<ID:0/006> cm.bin

<ID:0/006> boot.img

<ID:0/006> recovery.img

<ID:0/006> system.img

<ID:0/006> modem.bin

<ID:0/006> cache.img

<ID:0/006> hidden.img

<ID:0/006> RQT_CLOSE !!

<ID:0/006> RES OK !!

<ID:0/006> Removed!!

<ID:0/006> Remain Port .... 0

<OSM> All threads completed. (succeed 1 / failed 0)

Would be good to have any advice what else could be tested.