A new firmware update has been certified for the Xperia Z1 series with build number 14.6.A.1.216. The update has been certified for all variants of the Xperia Z1 (C6902, C6903, C6943, C6906), Xperia Z Ultra (C6802, C6833 , C6843 , C6806) and Xperia Z1 Compact (D5503)
source http://www.xperiablog.net/2015/10/2...rtified-for-xperia-z1-z1-compact-and-z-ultra/
for c6902 https://www.ptcrb.com/vendor/complete/view_complete_request_guest.cfm?modelid=24327
update: now the update is rolling out
Hmm, bug fixes?
Sent from my C6903 using Tapatalk
This seems still far from Marshmellow...
Super nice! Impatient to see what's in there!
I believe no marshmallow.
Maybe a update to close the latest found stagefright.
Probably for the second Stagefright vulnerability and some other bugfixes. Considering it changes the second last number to "1" instead of just upping the last number suggest it is a bigger update.
I have flashed last rooted firmware from recovery, will i receive this update via OTA?
i am searching google to see the changelog without lack
The update isn't out yet
dario2510 said:
I have flashed last rooted firmware from recovery, will i receive this update via OTA?
Click to expand...
Click to collapse
if you flash you will probably loose your root. i suggest you wait a little till someone creates a stock. 216 prerroted firmware and flash it through recovery!
kos25k said:
if you flash you will probably loose your root. i suggest you wait a little till someone creates a stock. 216 prerroted firmware and flash it through recovery!
Click to expand...
Click to collapse
i was asking if i will receive the update via OTA.
dario2510 said:
i was asking if i will receive the update via OTA.
Click to expand...
Click to collapse
You will receive, why not. If you are on a branded firmware you probably have to wait a little longer till you get you ota update notification.
What can give you probably more problems is the rooted phone and custom recovery which could prevent a successful update.
motorazrv3 said:
You will receive, why not. If you are on a branded firmware you probably have to wait a little longer till you get you ota update notification.
What can give you probably more problems is the rooted phone and custom recovery which could prevent a successful update.
Click to expand...
Click to collapse
Ok, so i have to flash the new firmware via recovery again, right?
dario2510 said:
Ok, so i have to flash the new firmware via recovery again, right?
Click to expand...
Click to collapse
yes.When someone,(hope soon) make a prerooted flashable zip.Others flash it with full wipe,others with just cache and dalvick..I personally every time flash it with full wipe including format system.
kos25k said:
yes.When someone,(hope soon) make a prerooted flashable zip.Others flash it with full wipe,others with just cache and dalvick..I personally every time flash it with full wipe including format system.
Click to expand...
Click to collapse
It takes 5 minutes for making a prerooted zip if you have the firmware.
dario2510 said:
It takes 5 minutes for making a prerooted zip if you have the firmware.
Click to expand...
Click to collapse
very nice. i think i saw the link to do that. so now we just wait for the update and the changelog
Guys, your talkin bout prerootes fw, is it out?
Gamer4Life said:
Guys, your talkin bout prerootes fw, is it out?
Click to expand...
Click to collapse
Not yet my friend for now only certification. Now we should waiting 2-3 weeks, when lazy operators starts rolling out updates.
Cheers ?
News about the firmware say its available ota
Can someone confirm?
Gamer4Life said:
News about the firmware say its available ota
Can someone confirm?
Click to expand...
Click to collapse
Nothing on my phone here in Germany.
Related
O.K guys...
This is quite simple
Download generic 534 (I used for central Europe)
DOWNLOAD FTF
Flash it via Flashtool and root with Kingo or root this way :
tnx @schickel
This method works great. If you don't trust these tools(Kingo root), use Root MANY ANDROID from Bin4ry. I've used this tool without any problems on the downgraded firmware.
Click to expand...
Click to collapse
Then boot ROM (you will need to restart your device two times to root proper) and you'll get OTA warning you have 257 firmware ready for update.
Download update and let the device flash the update.
And that's it
Now you have newest firmware and you root is here as well...
See ya
Sent from my C6903 using Tapatalk
I'm not talking theoretically - I just did that
Sent from my C6903 using Tapatalk
Thanks.
Not everyone gets the OTA, some need to do it via pccompanion.
But its great news to know the OTA update keeps root.
gregbradley said:
Thanks.
Not everyone gets the OTA, some need to do it via pccompanion.
But its great news to know the OTA update keeps root.
Click to expand...
Click to collapse
That's the point of this thread.
You'll get OTA if you use generic or world FTF.
That's why I said - first flash central Europe (for EU countries) and you'll get OTA info about 257 firmware.
I couldn't update by OTA too, then I did all this and now I can use OTA.
I was receiving OTA info but couldn't update - so I know not everyone can update that way.
Sent from my C6903 using Tapatalk
funky0308 said:
That's the point of this thread.
You'll get OTA if you use generic or world FTF.
That's why I said - first flash central Europe (for EU countries) and you'll get OTA info about 257 firmware.
Sent from my C6903 using Tapatalk
Click to expand...
Click to collapse
Yes I agree with you. But some will want to stay with region specific or branded firmware. There are other methods for them, this is good for those people who will want to flash to central Europe first.
I good find and thanks for confirming OTA keeps root.
I agree, of course
Thanks @Toledo_JAB for moving thread to right place. :thumbup:
Sent from my C6903 using Tapatalk
funky0308 said:
That's the point of this thread.
You'll get OTA if you use generic or world FTF.
That's why I said - first flash central Europe (for EU countries) and you'll get OTA info about 257 firmware.
I couldn't update by OTA too, then I did all this and now I can use OTA.
I was receiving OTA info but couldn't update - so I know not everyone can update that way.
Sent from my C6903 using Tapatalk
Click to expand...
Click to collapse
What for other methods do we have without unlocking bootloader and flashing other ftf?
Sent from my C6903 using xda app-developers app
So will this require wiping or can I install generic ROM over branded ROM?
EDIT: ROOT IS STILL HERE! WOOHOO!!!
OTA on phone preserves root, no matter which .534 firmware u have.
If u update from phone it preserves root
Make sure to switch to SuperSU app before u update, from any other superuser, works best
stealthj said:
EDIT: ROOT IS STILL HERE! WOOHOO!!!
OTA on phone preserves root, no matter which .534 firmware u have.
If u update from phone it preserves root
Make sure to switch to SuperSU app before u update, from any other superuser, works best
Click to expand...
Click to collapse
how do you force OTA though? I can't get it on Generic UK firmware...
Sean473 said:
how do you force OTA though? I can't get it on Generic UK firmware...
Click to expand...
Click to collapse
I didn't force it. I was running the .534 DK firmware and the update notification has always been there through the sony software update app. I chose the DK firmware over the hong kong firmware because I didin't like the NFC logo always on there and I'd rather my phone say 4G instead of LTE.
You may have to wait for the OTA! Not sure if there is a way to force it on the phone unless someone gets the update.zip after they download it and you flash it in stock recovery? not sure as I've never entered stock recovery yet. my BL still locked.
Damn it I want a nexus 5... but I'm afraid I'll get drunk or something and accidentally wash it like i do the Z1 all the time
masterv1 said:
What for other methods do we have without unlocking bootloader and flashing other ftf?
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
read the development thread, there are roms there that will help you
Sean473 said:
how do you force OTA though? I can't get it on Generic UK firmware...
Click to expand...
Click to collapse
you cant.
yo either do it manually or flash a ftf from cntral Europe to force it
gregbradley said:
read the development thread, there are roms there that will help you
you cant.
yo either do it manually or flash a ftf from cntral Europe to force it
Click to expand...
Click to collapse
How do you manually OTA? I only have the ftf file!
Sean473 said:
How do you manually OTA? I only have the ftf file!
Click to expand...
Click to collapse
unless you see it in your software update in phone settings you cant.
or you do what you quoted me as saying..flash a central eurpean ftf and then you will get an ota
I got the update pushed on OTA today (I have root) unfortunately it fails updating, no specified reason. Not looking forward to wiping phone and retrying it.
madlive said:
I got the update pushed on OTA today (I have root) unfortunately it fails updating, no specified reason. Not looking forward to wiping phone and retrying it.
Click to expand...
Click to collapse
Same here. I just tried the OTA update and got the update failed after the reboot.
EDIT:
Maybe because I rooted with using Vroot. From what I've read, people had success using Kingo root. I tried the update 4x so far after Vroot. I'll edit this post again after rooting using Kingo root and see if the update will go through or not.
funky0308 said:
O.K guys...
This is quite simple
Download generic 534 (I used for central Europe)
http://forum.xda-developers.com/showthread.php?t=2469191
Flash it via Flashtool and root with Kingo.
Click to expand...
Click to collapse
Hi Funky,
thanks for that tipp, will try out asap. But exactly which FTF you choosed, this one:
C6903 14.1.G.1.534 Central Europe1276-4314_R2A
Cheers
Yes, that's the firmware I have used.
As I said, I used that firmware just because my original firmware couldn't update via OTA.
I got info about new firmware but couldn't update until I first flashed that unbranded firmware.
Sent from my C6903 using Tapatalk
Can I flash the central Europe firmware without wiping data? If yes, then how to do it?
Sent from my C6903 using Tapatalk 2
Works like charm. OTA update is my favourite "root method".
Today, the long-awaited update Android 4.4.4 for Sony Xperia™ Z2 is released.
Rejoice!
But, installing this update will overrun the root access. Root access will be gone. So, how to root 23.0.1.A.0.167 FW on Sony Xperia™ Z2?
I'm gonna try the same old "Easy Root Tool" and see what happens. Any ideas would be good!
-EDIT-
Do you want to update your Sony Xperia™ Z2 to 4.4.4 but don't want to lose root? Don't worry, you won't! Click "here"
Credits to @niaboc79
Also, thanks to @funky0308 and @Envious_Data for their work
-EDIT 2-
I got root on 4.4.4 on my own, using this guide, credits @norti
@niaboc79 's pre-rooted ROM was based on Generic RU and the NC feature wasn't working on it. So I wanted to download a brand new FTF with my customization number and followed the steps on the guide.
ZBAM!
Got my own .167 (4.4.4) ROM (Generic DE) with root on my Sony Xperia™ Z2.
we will find a way...
but you should definitely put question mark in title...
we are lucky to have older fw (I'm talking for LB, z3 can't be downgrade and they will have problems to root 4.4.4. I believe we could use older fw to root fw and to upgrade keeping root...
I'll upgrade later today and will try few things...
In the title a statement and not a question !! WTF
I thought u achieved root, wtf
Jiyeon90 said:
I thought u achieved root, wtf
Click to expand...
Click to collapse
Haha I agree
What if we...
- backup TA
- unlock bootloader and root (how?)
- relock bootloader by restoring TA
???
epr said:
What if we...
- backup TA
- unlock bootloader and root (how?)
- relock bootloader by restoring TA
???
Click to expand...
Click to collapse
you can, yeah...as soon as Doom or NUT build/patch new kernel...
BTW @[NUT] will you work on this one?
tnx
does other rooting method on locked bootloader works?
Does this works? On locked bootloader? Android 4.4.4 (23.0.1.A.0.167)
http://forum.xda-developers.com/xperia-z2/general/how-to-root-firmware-314-t2821619
tazoman said:
Does this works? On locked bootloader? Android 4.4.4 (23.0.1.A.0.167)
http://forum.xda-developers.com/xperia-z2/general/how-to-root-firmware-314-t2821619
Click to expand...
Click to collapse
I doubt...
Sony patched all those security holes and all those methods should be updated.
Of course, someone should try...
Can anyone confirm he upgraded D6503 to 4.4.4?
Wouldn't downloading the update through PC companion and making an ftf/downloading an ftf and then pre-rooting the firmware work? We have recovery for the phone so a pre-rooted flashable firmware should work without working exploits right?
funky0308 said:
I doubt...
Sony patched all those security holes and all those methods should be updated.
Of course, someone should try...
Can anyone confirm he upgraded D6503 to 4.4.4?
Click to expand...
Click to collapse
In 30 minutes, I will. The update is downloading now. It's around 1.2GB.
Mod edit
As a few members noticed, the thread title was a little misleading, as it seemed like there already was a way to root the new firmware.
I changed the thread title to one that shouldn't mislead people.
OP, if you have any problems with this, or prefer a different title, please send me a private message or quote this reply.
Thread title changed
V4LKyR said:
In 30 minutes, I will. The update is downloading now. It's around 1.2GB.
Click to expand...
Click to collapse
4.4.4 for D6503 isn't out yet.
Don't bother to download that, it'll say it's 167 but you'll download 314 and flashing will stop immediately after downloading fw.
gamer649 said:
Wouldn't downloading the update through PC companion and making an ftf/downloading an ftf and then pre-rooting the firmware work? We have recovery for the phone so a pre-rooted flashable firmware should work without working exploits right?
Click to expand...
Click to collapse
Yes, that should work.
That's why I said, we are lucky to have older fws to downgrade and keep the root using prerooted fws...
we'll see once fw is available...
funky0308 said:
4.4.4 for D6503 isn't out yet.
Don't bother to download that, it'll say it's 167 but you'll download 314 and flashing will stop immediately after downloading fw.
Yes, that should work.
That's why I said, we are lucky to have older fws to downgrade and keep the root using prerooted fws...
we'll see once fw is available...
Click to expand...
Click to collapse
Uh-oh... Well, I guess you're right, what you said exactly happened. This is interesting.
funky0308 said:
4.4.4 for D6503 isn't out yet.
Don't bother to download that, it'll say it's 167 but you'll download 314 and flashing will stop immediately after downloading fw.
Yes, that should work.
That's why I said, we are lucky to have older fws to downgrade and keep the root using prerooted fws...
we'll see once fw is available...
Click to expand...
Click to collapse
I didn't actually read any of the other replies to the thread. Mainly cause the main post was all about how could we root it.
It is possible to install the lockeddualrecovery from NUT? If yes we can use it for root
Sent from my D6503 using XDA Premium 4 mobile app
i guess this will be the option for now. Root .314 firmware, backup TA then flash 4.4.4 ftf. Plug the device to flashtool and unlock the BL, install Doomkernel (for recovery), flash supersu.zip, plug phone again to flashtool reflash stock kernel, boot the phone and it should be rooted then restore TA Backup.
dyepnoodle said:
i guess this will be the option for now. Root .314 firmware, backup TA then flash 4.4.4 ftf. Plug the device to flashtool and unlock the BL, install Doomkernel (for recovery), flash supersu.zip, plug phone again to flashtool reflash stock kernel, boot the phone and it should be rooted then restore TA Backup.
Click to expand...
Click to collapse
Thats correct, but too long way to install .167
anyone is working on prerooted rom?
I'm starting so if anyone is already on it I don't want to lose time on that....
TheFerhatKing said:
It is possible to install the lockeddualrecovery from NUT? If yes we can use it for root
Sent from my D6503 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
It is possible to install it on a rooted firmware, you wouldn't be able to install it on the new firmware without root.
dyepnoodle said:
i guess this will be the option for now. Root .314 firmware, backup TA then flash 4.4.4 ftf. Plug the device to flashtool and unlock the BL, install Doomkernel (for recovery), flash supersu.zip, plug phone again to flashtool reflash stock kernel, boot the phone and it should be rooted then restore TA Backup.
Click to expand...
Click to collapse
You wouldn't even need to do that.
1) Root .314 firmware.
2) Install locked bootloader recovery.
3) Make a pre-rooted firmware of the 4.4.4 build.
4) Install the firmware through recovery.
---------- Post added at 07:06 PM ---------- Previous post was at 07:03 PM ----------
funky0308 said:
anyone is working on prerooted rom?
I'm starting so if anyone is already on it I don't want to lose time on that....
Click to expand...
Click to collapse
Is it for the D6502 or D6503? If I was able to update my D6503 to 4.4.4 I would have done it but I have been plagued with the same problem as all the other D6503 owners. I'm just going to wait for a UK unbranded pre-rooted firmware (or a UK unbranded ftf, whatever comes first).
No update via OTA or Sony PCC yet.
:highfive:
waw, nice info,
first comment :good:
Same here.. I almost rushed to my PC to check the PCC.. but there's no update available yet. :3
That's probably coming today or tomorrow! Nice!
Ratha ITC said:
No update via OTA or Sony PCC yet.
:highfive:
Click to expand...
Click to collapse
Ok mate waiting for u to create pre root on Customized SG.Tnx on ur 242 pre root SG been using it till now without any issue.Tnx and keep up the good work.
I have downloaded 270 firmware, create ftf, and re-upload in google drive. But its for C6906.
Alvian_P said:
I have downloaded 270 firmware, create ftf, and re-upload in google drive. But its for C6906.
Click to expand...
Click to collapse
where did you download? I do not see the xperifirm.
Alvian_P said:
I have downloaded 270 firmware, create ftf, and re-upload in google drive. But its for C6906.
Click to expand...
Click to collapse
Kindly post about phone screen if updated
I am on the .242 and got the email too. Checking tonight.
Vatron11 said:
where did you download? I do not see the xperifirm.
Click to expand...
Click to collapse
select z1 c6906
I've already updated my phone. I think 270 is now available for every Z1. Enjoy the update guys!
Check my pre-rooted 270 if you guys interested!
ImAnurag said:
Kindly post about phone screen if updated
Click to expand...
Click to collapse
xperiafirm says that its already available. how about the OTA? did you guys update it via OTA or flashtool?
yoorie016 said:
xperiafirm says that its already available. how about the OTA? did you guys update it via OTA or flashtool?
Click to expand...
Click to collapse
XperiFirm and flashtool
A few days more, there'll be update via OTA or PCC.
Ratha ITC said:
XperiFirm and flashtool
A few days more, there'll be update via OTA or PCC.
Click to expand...
Click to collapse
Thanks! i think i'll just download it via xperiafirm, can't wait for that update.
New update 2.20.40.184 released.
A small update, about 21MB.
Yup just now
Maybe to make the phone ready for the big one.
Can anyone post link for ota?
Can not find anything on official website yet.
Pls give link.
148 > 149 for ze550ml
fota.asus.com/delta_package/phone/WW_Z008/formal/WW_2.20.40.148_20160422_7279_user_rel-user-WW_Z008-WW_2.20.40.149_20160504_4052_user_rel-user-WW_Z008-20160504/WW_Z008-20160422-20160504-20160504.zip
Chancelog on the notification said
Update BLE FW
Fix APP2SD issue
183 > 184 for ze551ml
http://fota.asus.com/delta_package/...160504/WW_Z00A-20160421-20160504-20160504.zip
Chancelog on the notification said
Update BLE FW
Fix APP2SD issue
kirkoff said:
183 > 184 for ze551ml
http://fota.asus.com/delta_package/...160504/WW_Z00A-20160421-20160504-20160504.zip
Chancelog on the notification said
Update BLE FW
Fix APP2SD issue
Click to expand...
Click to collapse
Acca85 said:
148 > 149 for ze550ml
http://fota.asus.com/delta_package/...160504/WW_Z008-20160422-20160504-20160504.zip
Chancelog on the notification said
Update BLE FW
Fix APP2SD issue
Click to expand...
Click to collapse
Thanks for the links. You got it first before I posted.
I'm gonna wait the full firmware again. Let's see how long it take.
Can confirm, just received .149 on my 550. No problem applying with root (method 3).
Sent from my ASUS_Z008D using XDA-Developers mobile app
kirkoff said:
183 > 184 for ze551ml
http://fota.asus.com/delta_package/...160504/WW_Z00A-20160421-20160504-20160504.zip
Chancelog on the notification said
Update BLE FW
Fix APP2SD issue
Click to expand...
Click to collapse
Thanks bro
details of update
mickey36736 said:
Thanks for the links. You got it first before I posted.
I'm gonna wait the full firmware again. Let's see how long it take.
Click to expand...
Click to collapse
I think with complete FW tomorrow
I think the FW complete will be released tomorrow.
The link should be this:
http://dlcdnet.asus.com/pub/ASUS/ZenFone/ZE551ML/UL-Z00A-WW-2.20.40.184-user.zip
is it okay to apply fota via system update with unofficial bootloader unlocked
Sent from my ASUS_Z00AD using Tapatalk
iqbal_mahmuda said:
is it okay to apply fota via system update with unofficial bootloader unlocked
Sent from my ASUS_Z00AD using Tapatalk
Click to expand...
Click to collapse
If you didn't change Recovery - shouldn't be a problem. I've done this with previous updates before.
BobboVilla said:
If you didn't change Recovery - shouldn't be a problem. I've done this with previous updates before.
Click to expand...
Click to collapse
thanks! and is it relock bootloader?
Sent from my ASUS_Z00AD using Tapatalk
iqbal_mahmuda said:
thanks! and is it relock bootloader?
Sent from my ASUS_Z00AD using Tapatalk
Click to expand...
Click to collapse
no it isn't. your bootloader will remain unlocked.
Help pls
Im on .183 firmware but my recovery is on .164 (I just came back from CM13 but things are not going good at the rom so I flashed latest firmware but I cant find .183 recovery)
I tried updating into .184 update (latest) but error come by.
Can someone provide me a .183 recovery image? Or can somebody teach me how to flash the update using out-dated recovery.
Thank you (sorry for bad english)
Why still LP. And release 183,awhile later 184. Crap
jasxyhen said:
Im on .183 firmware but my recovery is on .164 (I just came back from CM13 but things are not going good at the rom so I flashed latest firmware but I cant find .183 recovery)
I tried updating into .184 update (latest) but error come by.
Can someone provide me a .183 recovery image? Or can somebody teach me how to flash the update using out-dated recovery.
Thank you (sorry for bad english)
Click to expand...
Click to collapse
Go to the pre-rooted rom thread in developement. You can download the boot, droidboot and recovery images as well as the pre-rooted roms. Flash with fastboot.
Just download what you need, if you have an old recovery you will probably need to flash all three files above...
good afternoon, I have the version .83, with Xposed and SuperSU, I have to do to install the update .84? Thank you.
As of 3:45 a.m. this morning I couldn't believe what I was seeing thanks Verizon it's about time still messing around with it (7.1.1.) I'll let you know how it goes like it so far oh yeah I'm on the east coast S.C. THANKS AGAIN AND GOD BLESS EVERYONE!!!
Downloading right now.
Mike
I'm in the United States and I got 7.1.1 last night ?
got it today also
Yep, it's finally here, downloading.
Update 7.1.1 is here on RETEU
Just got the 7.1.1 OTA for the Moto Z Play on RETEU
Will keep you posted as soon as installed and tested
Just downloading 7.1.1. in Germany
I'm doing the 7.1.1 update in France
I'm here on April patch RETEU, but I'm rooted, with custom kernel and modified system.
What is the safe way to install the 7.1 OTA? I've already been notified about it.
Safe way is to flash everything from bootloader with a full package... OTA is to be avoided if you modified system and recovery.
GalaxyDrei said:
I'm here on April patch RETEU, but I'm rooted, with custom kernel and modified system.
What is the safe way to install the 7.1 OTA? I've already been notified about it.
Click to expand...
Click to collapse
Safest way is to flash my 7.1.1 stock rom, if you decide you don't like 7.1.1 you can safely move back or forth to any rom. Taking the OTA means you can't or should downgrade or you could end up hard bricked.
karendar said:
Safe way is to flash everything from bootloader with a full package... OTA is to be avoided if you modified system and recovery.
Click to expand...
Click to collapse
Yeah, I see. But the latest avaible full RETEU firmware is NPN25.137-24-1 and flashing this is not safe. Can I flash RETAIL april patch instead?
Got the update too but is your home button with Google animation? Mine turned into pixel home button 2 hours after the update
GalaxyDrei said:
I'm here on April patch RETEU, but I'm rooted, with custom kernel and modified system.
What is the safe way to install the 7.1 OTA? I've already been notified about it.
Click to expand...
Click to collapse
What did you use to root the Verizon model? I thought it can't be done.
Installation ok (Spain)
It was a long wait but i got it over here ( netherlands ) also.
No issues so far.
karendar said:
Safe way is to flash everything from bootloader with a full package... OTA is to be avoided if you modified system and recovery.
Click to expand...
Click to collapse
how to do that plz ? can i start the OTA and when downloaded i stop the update process, boot twrp, and flash the downloaded ota file ?
Or the only way is to download the from somebody on xda ?
shicomm said:
It was a long wait but i got it over here ( netherlands ) also.
No issues so far.
Click to expand...
Click to collapse
Here is one issue on reteu. Audio FX is not working.
flashallthetime said:
Safest way is to flash my 7.1.1 stock rom, if you decide you don't like 7.1.1 you can safely move back or forth to any rom. Taking the OTA means you can't or should downgrade or you could end up hard bricked.
Click to expand...
Click to collapse
Didn't want to risk anything, so I flashed your ROM
Indeed, getting around the globe reached retus. Now is question, should I accept or not?
Sent from my XT1635-02 using Tapatalk