Please help. I find your site and this noob's thread is so informative but I couldn't find a way to fix my boot loop. The XDA is full of dev tech jargon, and felt exhausted that I seek help finally here.
My xperia tab z (sgp321 with LTE+WIFI, European version) got into bootloop after flashing CWM 22.214.171.124 (TabZ_DooMLoRD_AdvStkKernel_FW-253-v01.img). The flashing went fine I was able to boot into recovery mode and made a backup. But after the backup is over, and rebooting it prompted Reboot > root access is missing. Root? I selected 'YES' thinking I could root the device. Then bootloop started. I followed all the steps in your thread, Factory reset, Wipe cache, Delvik cache, fix permission etc but still into bootloop.
The device is boot-loader unlocked. It was running KK 4.4.2. Not rooted. I have CM-11-20140723-Nightly-pollux.zip in the external SD card of which I was planning to flash using CWM recovery.
1. What options remain for me to get the device back into original state ? back into 4.4.2.
2. I was able to pass ADB calls. But now since into bootloop, how can I make fastboot/ADB calls to device consistently to do anything realted to reset, recover?
3. In addition to ADB/fastboot, I have Flashtool 0.9.16 by Androxyde with SGP321_10.4.1.B.0.101_CE.ftf stock firmware. Can I flash this Stock ROM while in bootloop ? How can flashtool help in this situation ?
4. The Tablet Z battery is built-in. Does it charge while in bootloop? How can I power-down/shutdown the device without restarting using CWM (it has only reboot option), so that I could fully charge the device ?
Any helpful advise is very much appreciated.
Thank you very much for great work you are doing and the very purpose for XDA - Knowledge Sharing.
---------- Post added at 11:04 AM ---------- Previous post was at 10:41 AM ----------
Please, can you tell me what steps you made during recovery? My xperia tab z SGP321 (LTE+WIFI European version) is now into bootloop; it was unlocked but not rooted, has CWM 126.96.36.199 and I can boot into recovery mode. Please tell me where to start from ? Can I make ADB/fastboot calls without resolving bootloop or can I flash any stock ROMs using flash tool still with bootloop issue unfixed ? How Can I get the device back into work ?
Much appreciate your help. I have posted details in the same thread.
I still need to clarify few things as I'm still confused.
During flash, it shows the following info.
Model - SGP321
Application software - 10.1.1.A.1.253
File system - global-lte 10.5.A.0.230 (which is 4.4.2)
SIM - unlocked
But it downloaded and flashed 10.4.b.0.569 which is JB 4.3 (showed in the progress bar while downloading and flashing). It took nearly 1 hour to download the ROM (1 gb nearly) from Sony and flash it. Then I had 4.4.2. What exactly the tool has done here ? I guess its not the one I had as I had to OTA the default 4.4.2 apps kit and configure all the settings from scratch as soon as the device got booted up. Means flasher has actually flashed an 4.4.2 clean image. Or it had flashed 4.3 first then had 4.4 upgraded in one go. Can an expert kindly explain ?
If anyone needs help on EMMA, please post.
Many thanks XDA.