Firmware downgrades in to boot loop - Xperia Z5 Premium Q&A, Help & Troubleshooting

hey guys, i need a little help here, i am trying to downgrade my firmware to .200 but my z5p keeps getting stuck in a boot loop and i have no idea how to proceed. I saw another thread with another user having similar issue but the solution offered didnt work for me, any help is appreciated. scratch that something worked...
now im getting "command not allowed" when i try to unlock bootloader, any help is appreciated
scratch that too, i did nto turn on oem unlock

Related

[Q] Unable to re unlock the bootloader.. :(

Hello All,
I had previously unlocked my bootloader with the SE official method. Recently I had to submit my cell to the service center due some issue so I had relocked the bootloader using the Flashtool. Today I got my cell back and not I tried to unlock the bootloader again using the SE official method, it is not allowing me to do so.. It gives an error saying unlock device required.. Please help.. :crying:
Common issue, so you'll have to sit tight for a way to unlock those back from service, or give them a ring and try and find out what's causing the issue and report back here with something useful.
Sent from myushi

[Q] Help with FreeGee

Hey guys, sorry for my bad english.
Guys, could someone help me? I was following the procedures to install a custom ROM, and when I use to unlock the bootloader Freegee gave a message: "sorry your version is not currently supported software." Asked for upload the boot image and when did the problem persists. If there is someone with the same problem, please help me.
Remembering that not bricked my cell, not only completed the bootloader, which is essential for using the custom rom.
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# edit
Now the problem is another. When I tried to install the bootloader as I said above, I went with. Apk I saw a tutorial that passed me. It did not work as reported. Now tried with the PlayStore, busybox installed and executed normally. However, when I went to "unlock" there was no such option. Instead this was "re-lock", as if the bootloader was already unlocked, just not realized any unlock procedure. Could anyone help me with this problem? Appreciate.

[Q] Trying to unlock bootloader, fails (too many links) and stays locked.

As the title suggest, I'm trying to unlock my bootloader but every time it fails because I have too many links. No idea what that means, but the more severe problem is that with other users the phone will be unlocked, but mine is still locked.. What should I do? Thanks in advance.

lollipop OTA fail

Hi guys I got the lollipop OTA for my nexus ( completely stock), never tinkered with it and the OTA installed but now its stuck on "google" screen and constantly bootloops. I have done some reading and I tried to unlock bootloader via Wugfresh toolkit and normal fastboot oem method but no avail, it gets stuck on the "yes" option.
Basically I have a locked bootloader which fails to unlock, and nexus stuck in google logo, any guidance will be much appreciated. Plz point me towards the right direction. :crying:
Try to unlock the bootloader from adb with OEM unlock command. The steps are posted above the factory images on Google's dev site.
yeah I tried that and tablet gets stuck on the yes option at unlock bootloader screen and nothing happens for 20 minutes , i have to restart it. I've read around and it seems like my emmc might have corrupted. Any pointers?
Nxpx said:
yeah I tried that and tablet gets stuck on the yes option at unlock bootloader screen and nothing happens for 20 minutes , i have to restart it. I've read around and it seems like my emmc might have corrupted. Any pointers?
Click to expand...
Click to collapse
Well I can only think of one thing. Buy a new nexus. There aren't any listings for the Wi-Fi version and the LTE on Swappa. However there is some other devices on Swappa.

Nexus 5X bootloader locked, PIN locked, & bootloop

Hello,
I'm in a rather peculiar situation. I bought a Nexus 5X from eBay recently (I know) which was advertised as having the common bootloop issue, of which I saw there seems to be a fix for. After receiving the phone I found that not only does it bootloop, but the bootloader is still locked and the previous owner has set up the phone and used a PIN lock on the lockscreen, leaving me unable to get into the settings to enable Developer settings and unlock the bootloader. Does anyone know of any kind of fix for this? Just to reiterate, I cannot flash any stock rom, and there is no custom recovery on the device. I am not new to unlocking bootloaders and flashing custom firmware, and I have contacted the previous owner to no avail. Any help in this issue would be greatly appreciated.
I have searched the forums but as my situation is compounded of multiple problems (locked BL, no custom recovery and PIN lock) I feel like I have hit a dead end.
I am with ya
I have the exact situation i would love to know if you have figured it out. i have two of them as a package deal from ebay. Both 5x.
advertised as bootloop. wont go past the google screen.. one them i actually got to fire up but then ran into the pin thing...
Can you get in fastboot mode ? If so, you can try flashing a custom recovery

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