[Xperia Z1 Q&A, Help & Troubleshooting] siavo:
Hello!

I upgraded my z1 to 4.3 but while attempting to make a call my phone froze and after restarting i was stuck in a boot loop.

I've very carefully went through many threads and finally decided to post because after trying all the methods i'm still stuck at boot stall. (Sony logo)

I've used the flashtool ( Version 0.9.13.0 ) to flash the latest FTF (C6903 14.2.A.0.290 Central Europe 1276-4314_R1B) But to no avail. I've also tried resetting it through SUS (complete system format/factory reset) and its the same.

Also tried downgrading to .257 and i'm still stuck with the same bootloop.

Here are the logs from Flashtool, If this helps.

21/019/2013 19:19:07 - INFO - Selected C6903 / 14.2.A.0.290 / Generic Central Europe 1276-4314

21/019/2013 19:19:07 - INFO - Preparing files for flashing

21/019/2013 19:19:29 - INFO - Please connect your device into flashmode.

21/020/2013 19:20:29 - INFO - Device disconnected

21/020/2013 19:20:50 - INFO - Device connected in flash mode

21/020/2013 19:20:50 - INFO - Opening device for R/W

21/020/2013 19:20:51 - INFO - Reading device information

21/020/2013 19:20:51 - INFO - Phone ready for flashmode operations.

21/020/2013 19:20:51 - INFO - Current device : C6903 - BH9085PV06 - 1277-2882_R2B - 1272-6084_14.2.A.0.290 - GLOBAL-LTE_14.2.A.0.290

21/020/2013 19:20:51 - INFO - Start Flashing

21/020/2013 19:20:51 - INFO - Processing loader.sin

21/020/2013 19:20:51 - INFO - Checking header

21/020/2013 19:20:51 - INFO - Flashing data

21/020/2013 19:20:51 - INFO - Loader : S1_Root_6732 - Version : MSM8974_23 / Boot version : S1_Boot_MSM8974_LA1.04_15 / Bootloader status : NOT_ROOTABLE

21/020/2013 19:20:51 - INFO - Disabling final data verification check

21/020/2013 19:20:51 - INFO - Processing partition-image.sin

21/020/2013 19:20:51 - INFO - Checking header

21/020/2013 19:20:51 - INFO - Flashing data

21/020/2013 19:20:51 - INFO - Parsing boot delivery

21/020/2013 19:20:51 - INFO - Phone boot version : S1_Boot_MSM8974_LA1.04_15. Boot delivery version : S1_Boot_MSM8974_LA1.04_15

21/020/2013 19:20:51 - INFO - Boot delivery is up to date. Nothing done for boot bundle

21/020/2013 19:20:51 - INFO - Processing kernel.sin

21/020/2013 19:20:51 - INFO - Checking header

21/020/2013 19:20:51 - INFO - Flashing data

21/020/2013 19:20:52 - INFO - Processing rpm.sin

21/020/2013 19:20:52 - INFO - Checking header

21/020/2013 19:20:52 - INFO - Flashing data

21/020/2013 19:20:52 - INFO - Processing fotakernel.sin

21/020/2013 19:20:52 - INFO - Checking header

21/020/2013 19:20:52 - INFO - Flashing data

21/020/2013 19:20:53 - INFO - Processing amss_fs_2.sin

21/020/2013 19:20:53 - INFO - Checking header

21/020/2013 19:20:53 - INFO - Flashing data

21/020/2013 19:20:53 - INFO - Processing amss_fs_1.sin

21/020/2013 19:20:53 - INFO - Checking header

21/020/2013 19:20:53 - INFO - Flashing data

21/020/2013 19:20:53 - INFO - Processing amss_fsg.sin

21/020/2013 19:20:53 - INFO - Checking header

21/020/2013 19:20:53 - INFO - Flashing data

21/020/2013 19:20:53 - INFO - Processing apps_log.sin

21/020/2013 19:20:53 - INFO - Checking header

21/020/2013 19:20:53 - INFO - Flashing data

21/020/2013 19:20:53 - INFO - Processing cache.sin

21/020/2013 19:20:53 - INFO - Checking header

21/020/2013 19:20:53 - INFO - Flashing data

21/020/2013 19:20:54 - INFO - Processing system.sin

21/020/2013 19:20:54 - INFO - Checking header

21/020/2013 19:20:54 - INFO - Flashing data

21/022/2013 19:22:48 - INFO - Processing userdata.sin

21/022/2013 19:22:48 - INFO - Checking header

21/022/2013 19:22:48 - INFO - Flashing data

21/023/2013 19:23:03 - INFO - Processing elabel-C6903-row_201310221100.1_14.2.A.0.290.sin

21/023/2013 19:23:03 - INFO - Checking header

21/023/2013 19:23:03 - INFO - Flashing data

21/023/2013 19:23:05 - INFO - Flashing cust-reset.ta

21/023/2013 19:23:05 - INFO - Custumization reset is now based on UI choice

21/023/2013 19:23:05 - INFO - Ending flash session

21/023/2013 19:23:05 - INFO - Flashing finished.

21/023/2013 19:23:05 - INFO - Please unplug and start your phone

21/023/2013 19:23:05 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings

21/023/2013 19:23:05 - INFO - Device connected in flash mode

21/024/2013 19:24:43 - INFO - Device disconnected

Rebooting is fine it gives three vibrations and shuts down.

I havent rooted the device. This is the first update i've tried.

Trying to download C6903_14.1.G.2.257_GLOBAL-LTE (1277-1398).ftf to see if that would help but unfortunately, can't download, gets stuck , Temporary error, retrying.

Any help will be appreciated, i'm at my wits end trying to revive this phone but i just can't seem to understand where i'm going wrong. :(

Thanks in advance!