Related
hey guys,
after a long day og non-success i really need your help here.
i tried to do a factory image restore as described here: http://forum.xda-developers.com/showthread.php?t=1907796
Everything worked fine until it came to the point of flashing the image (fastboot -w update image-nakasi-jop40c.zip). as you can see on screenshot1 it stops working at step "sending system" (i´ve been waiting for 2 hours, nothing happened).
also tried the same procedure with nexus 7 toolkit and nexus root toolkit, but here the same problem mentioned above occurs when "sending bootloader" (see screenshot2).
all in all here is what i´ve got:
working unlocked bootloader (4.13), stock recovery and fastboot - but no system
i hope there´s all the information you need right now and anyone can help me out of this misery.
thanks!
Take a look at this video; it describes everything you need to learn how to use the Nexus 7 Root Toolkit: http://www.youtube.com/watch?v=sK9avekmA1c
Once you figure it out you will also be able to flash the stock ROM to your tablet.
boerni2k said:
hey guys,
after a long day og non-success i really need your help here.
i tried to do a factory image restore as described here: http://forum.xda-developers.com/showthread.php?t=1907796
Everything worked fine until it came to the point of flashing the image (fastboot -w update image-nakasi-jop40c.zip). as you can see on screenshot1 it stops working at step "sending system" (i´ve been waiting for 2 hours, nothing happened).
also tried the same procedure with nexus 7 toolkit and nexus root toolkit, but here the same problem mentioned above occurs when "sending bootloader" (see screenshot2).
all in all here is what i´ve got:
working unlocked bootloader (4.13), stock recovery and fastboot - but no system
i hope there´s all the information you need right now and anyone can help me out of this misery.
thanks!
Click to expand...
Click to collapse
thanks for your answer but this is not helpful. the problem is not that i dont know how to use the tools but somehow the flashing process stops at the points mentioned above and i cant explain why
Maybe your downloaded factory image is corrupted somehow? You could try re-downloading and/or flashing the system.img separately:
fastboot flash system system.img
i already tried that and also let the toolkits download the images themselves but still no success.
when flashing the system.img seperately it still just says sending system.img but nothing happens
trying to flash an older bootloader also failed due to the same problem
Try different cable/USB port/PC. Sounds unlikely but you'd be surprised.
Looks like the 4.13 bootloader has a serious issue with receiving and then flashing data, I keep reading about this....
dave_uk said:
Try different cable/USB port/PC. Sounds unlikely but you'd be surprised.
Click to expand...
Click to collapse
holy cow. it´s always the simple things in life that really matter right? although i already tried different usb ports, there were still others to try and finally it worked!
thanks man! problem solved
boerni2k said:
holy cow. it´s always the simple things in life that really matter right? although i already tried different usb ports, there were still others to try and finally it worked!
thanks man! problem solved
Click to expand...
Click to collapse
Had a very similar situation myself a couple of days where I thought I'd completely murdered by days-old Nexus 7 3G and switching flaming USB ports sorted it. Annoyance and relief in equal measure! Glad it worked for you.
D
Please help me... I have a Nexus 7 wifi edition (old version).
I installed wugfresh toolkit and tried to install factory 4.4
After about 15 minutes nothing was happening so I tried to reboot my Nexus 7. Now it is stuck in bootloader mode. It does not want to start. I tried reflashing stock again but it says USB debugging needs to be enabled, but I can't boot my device... how do I revive it please.. thank you
My device was already bootloader unlocked, and running 4.2 grouper JDQ39
Thank you
nm8 said:
Please help me... I have a Nexus 7 wifi edition (old version).
I installed wugfresh toolkit and tried to install factory 4.4
After about 15 minutes nothing was happening so I tried to reboot my Nexus 7. Now it is stuck in bootloader mode. It does not want to start. I tried reflashing stock again but it says USB debugging needs to be enabled, but I can't boot my device... how do I revive it please.. thank you
My device was already bootloader unlocked, and running 4.2 grouper JDQ39
Thank you
Click to expand...
Click to collapse
Did you tried flash stock+Unroot (Device is on/Normal ) mode ?
KrilanPL said:
Did you tried flash stock+Unroot (Device is on/Normal ) mode ?
Click to expand...
Click to collapse
yes, but it does not work because the software says it needs USB debugging enabled... but I can't boot to android
Hi try this i watched in you tube. Mine was stuck in bootlop after ota to 4.4. I hope this will help you and sorry if i am wrong about it. http://m.youtube.com/results?q=return to stock nexus 7&sm=3
Sent from my MB855 using xda premium
deny_kei said:
Hi try this i watched in you tube. Mine was stuck in bootlop after ota to 4.4. I hope this will help you and sorry if i am wrong about it. http://m.youtube.com/results?q=return to stock nexus 7&sm=3
Sent from my MB855 using xda premium
Click to expand...
Click to collapse
Hi
thanks for the link, good informations there, but I already solved the problem by using MSKIP's software.
Thanks for helping though...
nm8 said:
Please help me... I have a Nexus 7 wifi edition (old version).
I installed wugfresh toolkit and tried to install factory 4.4
After about 15 minutes nothing was happening so I tried to reboot my Nexus 7. Now it is stuck in bootloader mode. It does not want to start. I tried reflashing stock again but it says USB debugging needs to be enabled, but I can't boot my device... how do I revive it please.. thank you
My device was already bootloader unlocked, and running 4.2 grouper JDQ39
Thank you
Click to expand...
Click to collapse
Hi I recently bricked my nexus 7 too and unbricked it myself. there aren't a lot of people willing to help here as I know, and I know I can help you. First thing first, there is noway you can brick your nexus 7, no matter what you have done, so just clam down.
to unbrick your nexus 7, there is what I suggest you to try>
1, download fastboot, adb. make sure they are the newest version.
2, download recovery-clockwork-touch-6.0.4.3-grouper. this is a recovery img that you install into your nexus 7
3, get Google android USB driver!! uninstall every before you install this!!
4, put your neuxs 7 into boot loader mode by holding about 3 buttons.
5, connect your nexus 7 to your PC
6, If you are a windows using, using command prompt "fastboot.exe devices"
7, something should come up. then you are in the right track.
8, type fastboot.exe flash recovery recovery-clockwork-touch-6.0.4.3-grouper
9, you should get a message saying everything is install correctly.
10, using vol down to go the recovery mode on your device. The CWM should be installed!!!
11, Download any android ROM for nexus 7, and simply install it using CWM!!
12, Adb doesn't work on me because I can't get into USB debug mode. You have to use an OTG USB cable. Copy the ROM to an USB driver and connect that USB to your nexus using this OTG USB cable.
13, install!!! done!!!
nm8 said:
Hi
thanks for the link, good informations there, but I already solved the problem by using MSKIP's software.
Thanks for helping though...
Click to expand...
Click to collapse
Could you elaborate a little more on what step you picked from the main menu of that software? I'm not having any luck getting my Nexus fixed.
Posted my thread for help here http://forum.xda-developers.com/showthread.php?t=2560975
Guess I will try megapig's suggestions next. I've tried so many procedures and none of them are working.
EntityPacket said:
Could you elaborate a little more on what step you picked from the main menu of that software? I'm not having any luck getting my Nexus fixed.
Posted my thread for help here http://forum.xda-developers.com/showthread.php?t=2560975
Guess I will try megapig's suggestions next. I've tried so many procedures and none of them are working.
Click to expand...
Click to collapse
I just uninstalled all the crap that the other software installed, then on MSKIP's software, I chose no. 1, then after that, I installed stock, can't remember the number but it is there...
Thanks, I did manage to get it fixed last night. Posted update in my thread.
Whew
Could someone please offer some advice, i really am stumped on this one. I have a nexus 4 which is rooted has an unlocked bootloader and is running on the stock version of kitkat. Last week i changed network and as bizarre as it sounds when i got disconnected from three my phone bricked and got stuck on the boot logo.
Since then i went home and got the skipsoft toolkit up and running to essentially put a fresh rom on. Unfortunately no luck, i have gone into the bootloader and recovery,factory/wipe reset -- still no luck it's stuck on the boot logo. Now i realised that adb isn't working only fastboot which has also limited my options. i have tried multiple version of roms/recoverys etc.. they install which confirmed by the change of boot logo but that's it just hangs again.
Is there something else i can try? I would really appreciate some direction on it. Thanks very much in advanced.
airrunner said:
Could someone please offer some advice, i really am stumped on this one. I have a nexus 4 which is rooted has an unlocked bootloader and is running on the stock version of kitkat. Last week i changed network and as bizarre as it sounds when i got disconnected from three my phone bricked and got stuck on the boot logo.
Since then i went home and got the skipsoft toolkit up and running to essentially put a fresh rom on. Unfortunately no luck, i have gone into the bootloader and recovery,factory/wipe reset -- still no luck it's stuck on the boot logo. Now i realised that adb isn't working only fastboot which has also limited my options. i have tried multiple version of roms/recoverys etc.. they install which confirmed by the change of boot logo but that's it just hangs again.
Is there something else i can try? I would really appreciate some direction on it. Thanks very much in advanced.
Click to expand...
Click to collapse
What do you mean you changed network? What recovery are you using twrp or cwm hope it's twrp I think you need to search forums for wugfresh tool kit and start fresh which means going back to stock rom, recovery etc.. Wugfresh toolkit is the easiest method for you and even has videos on YouTube for step by step instructions you can't go wrong be patient and pay attention and you will be OK..www.wugfresh.com/youtube
---------- Post added at 09:58 PM ---------- Previous post was at 09:56 PM ----------
WelfareBaby said:
What do you mean you changed network? What recovery are you using twrp or cwm hope it's twrp I think you need to search forums for wugfresh tool kit and start fresh which means going back to stock rom, recovery etc.. Wugfresh toolkit is the easiest method for you and even has videos on YouTube for step by step instructions you can't go wrong be patient and pay attention and you will be OK..www.wugfresh.com/
Click to expand...
Click to collapse
[/COLOR]
WelfareBaby said:
What do you mean you changed network? What recovery are you using twrp or cwm hope it's twrp I think you need to search forums for wugfresh tool kit and start fresh which means going back to stock rom, recovery etc.. Wugfresh toolkit is the easiest method for you and even has videos on YouTube for step by step instructions you can't go wrong be patient and pay attention and you will be OK
Click to expand...
Click to collapse
I meant literally that i changed network from three to ee, which i also brought my original number over with it. The day my number transfered to ee my phone bricked and it's been stuck on boot loop since.
I have never used wugfresh before but i followed your instructions and spent sometime with it this morning. It's a very simple piece of software and i must admit i was feeling hopeful it might have fixed my boot-loop issue, but it hasn't. I have done factorywipes/wiped cache, flashed multiple version roms. As far as recovery i had TWRP running on my device, but for some reason i am no longer able to go into it only the bootloader. When i do click on recovery i got the android on its back with the exclamation mark, which obviously gives me the wipe options which i have done.
If there is anything else you can think of i would be greatly appreciative.
airrunner said:
[/COLOR]
I meant literally that i changed network from three to ee, which i also brought my original number over with it. The day my number transfered to ee my phone bricked and it's been stuck on boot loop since.
I have never used wugfresh before but i followed your instructions and spent sometime with it this morning. It's a very simple piece of software and i must admit i was feeling hopeful it might have fixed my boot-loop issue, but it hasn't. I have done factorywipes/wiped cache, flashed multiple version roms. As far as recovery i had TWRP running on my device, but for some reason i am no longer able to go into it only the bootloader. When i do click on recovery i got the android on its back with the exclamation mark, which obviously gives me the wipe options which i have done.
If there is anything else you can think of i would be greatly appreciative.
Click to expand...
Click to collapse
.
I really have no clue what changing network to ee is did you not create a backup if so you could restore it but since you can't once you get in bootloader and scroll to recovery you get dead android use to toolkit I told you and flash stock+unroot option it should work
---------- Post added at 12:57 AM ---------- Previous post was at 12:56 AM ----------
WelfareBaby said:
.
I really have no clue what changing network to ee is did you not create a backup if so you could restore it but since you can't once you get in bootloader and scroll to recovery you get dead android use to toolkit I told you and flash stock+unroot option it should work
Click to expand...
Click to collapse
If not pm me try to help you figure it out
I am very grateful you taking the time to help me with the boot issue. But i have actually just managed to sort it, finally!
It came down to me changing to an older radio version for 4.4.4., then i installed a 4.3 rom which it worked! I then upgraded to 5.01 and hey presto it's back to normal.
Thanks again nexus root tool-kit is definitely an essential
airrunner said:
I am very grateful you taking the time to help me with the boot issue. But i have actually just managed to sort it, finally!
It came down to me changing to an older radio version for 4.4.4., then i installed a 4.3 rom which it worked! I then upgraded to 5.01 and hey presto it's back to normal.
Thanks again nexus root tool-kit is definitely an essential
Click to expand...
Click to collapse
Your welcome glad I could help we all been in some situation before since you back up and running don't forget to make a backup of current rom always good idea to have that handy in case.. Cheers...
Hi
Since Friday my Nexus 6P freezes on boot animation logo.
I never tried to root my phone, neither force an updated on it (First time I went in recovery/fastboot mode was this weekend).
Friday morning I received a notification for an OTA update, so I clicked on it to install it and from this point my phone never started up again.
I tried many solutions but none of them worked, so I deciced to ask here finally as my last resort..
What I've tried :
Fastboot flash fails "device is locked" (and fastboot flashing unlock fails aswell because "oem unlock is not allowed" in dev options)
Recovery wipe data/factory reset works but my phone won't boot either (waited for ~1h)
Adb sideload OTA.zip (MMB29P → MMB29Q) fails "Verifying current system... System partition has unexpected content"
Nexus Root Toolkit (Flash Stock + Unroot with options Soft-Bricked/Bootloop) doesn't work
I run out of options, does anyone have another solution ?
Thank you
sorry I don't have ansewer except call google play support 855 836 3987
benrospars said:
Hi
Since Friday my Nexus 6P freezes on boot animation logo.
I never tried to root my phone, neither force an updated on it (First time I went in recovery/fastboot mode was this weekend).
Friday morning I received a notification for an OTA update, so I clicked on it to install it and from this point my phone never started up again.
I tried many solutions but none of them worked, so I deciced to ask here finally as my last resort..
What I've tried :
Fastboot flash fails "device is locked" (and fastboot flashing unlock fails aswell because "oem unlock is not allowed" in dev options)
Recovery wipe data/factory reset works but my phone won't boot either (waited for ~1h)
Adb sideload OTA.zip (MMB29P → MMB29Q) fails "Verifying current system... System partition has unexpected content"
Nexus Root Toolkit (Flash Stock + Unroot with options Soft-Bricked/Bootloop) doesn't work
I run out of options, does anyone have another solution ?
Thank you
Click to expand...
Click to collapse
Get to stock recovery using this guide, once there wipe cache partition then wipe data/factory reset. If that doesn't work call Google or RMA like error629 said.
http://www.androidexplained.com/nexus-6p-recovery-mode/
Read this thread. If I didn't know better, Id say it was yours.
http://forum.xda-developers.com/nexus-6p/help/command-t3308390
if your bootloader is locked and you didnt enable ADB in developer settings, you're out of luck
Contact google.
Soulfly3 said:
Read this thread. If I didn't know better, Id say it was yours.
http://forum.xda-developers.com/nexus-6p/help/command-t3308390
if your bootloader is locked and you didnt enable ADB in developer settings, you're out of luck
Contact google.
Click to expand...
Click to collapse
Yes exact same problem. I'll try to contact Google or Huawei then..
So I contacted Huawei Support (since I didn't buy it from the Google Store) and they told me to bring my phone to a PSM. PSM took my phone in charge and now I have to wait ~2 weeks (they send it back to Huawei). I'll update the thread when I get it back, this might be useful to somebody.
were on the same boat..
i remember a mate of mine uncheck the oem unlocking in the dev option.. then an OTA update came out and i updated it.. now the phone is stock only in bootloader. i wish i could enable the oem unlock.. but the problem is the phone wont boot normal.. pls help
im getting frustrated with my phone.. im thinking of overvolting the usb port with 12V so the dealership wont know about the reflashing
jeremmie said:
were on the same boat..
i remember a mate of mine uncheck the oem unlocking in the dev option.. then an OTA update came out and i updated it.. now the phone is stock only in bootloader. i wish i could enable the oem unlock.. but the problem is the phone wont boot normal.. pls help
im getting frustrated with my phone.. im thinking of overvolting the usb port with 12V so the dealership wont know about the reflashing
Click to expand...
Click to collapse
That would be fraud. Have you tried adb sideload?
No not yet.. i tried researching about sideload.. but i cant seem to understand it.. perhaps do you have any guide on how to do it? Would be really happy if someone post a guide.
---------- Post added at 08:29 AM ---------- Previous post was at 08:16 AM ----------
Also my nexus 6p wont enter recovery mode. It can only access the bootloader
So i cant make adb sideload to work because i cant access my recovery mode. It can only enter bootloader and barcodes and thats it.. pls help.. sigh..
jeremmie said:
No not yet.. i tried researching about sideload.. but i cant seem to understand it.. perhaps do you have any guide on how to do it? Would be really happy if someone post a guide.
---------- Post added at 08:29 AM ---------- Previous post was at 08:16 AM ----------
Also my nexus 6p wont enter recovery mode. It can only access the bootloader
So i cant make adb sideload to work because i cant access my recovery mode. It can only enter bootloader and barcodes and thats it.. pls help.. sigh..
Click to expand...
Click to collapse
If that's the case there's nothing anyone here can do or say to help you, your only option is sending it back for repair. Hopefully a lesson has been learned here.
Good morning
We should make group called nexus 6p bricked devices since we all got same problem .
I read in Google forum that March update released and some users got same problem after flashing it
So we have to make topic also called ( warning read before flash your ota ) at least to help new n6p users .
Ok so i got my phone fixed by my dealer.. So far so good. And they knew that i fcuked up my nexus so they've told me not to reflash the system again.
My nexus 6p is now bonestocked
Sent from my Nexus 6P using Tapatalk
jeremmie said:
Ok so i got my phone fixed by my dealer.. So far so good. And they knew that i fcuked up my nexus so they've told me not to reflash the system again.
My nexus 6p is now bonestocked
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
I am happy to hear that hope mine fixed too , I think first thing you have to do is to unlock your bootloader and that's enough ATM .
jeremmie said:
Ok so i got my phone fixed by my dealer.. So far so good. And they knew that i fcuked up my nexus so they've told me not to reflash the system again.
My nexus 6p is now bonestocked
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
atef79 said:
I am happy to hear that hope mine fixed too , I think first thing you have to do is to unlock your bootloader and that's enough ATM .
Click to expand...
Click to collapse
I agree with this. Having an unlocked bootloader is insurance in case anything goes wrong in future.
Hello all,
Anybody can help me, my problem is that my nexus 6p stuck on google screen (boot-loop), noting that unfortunately the boot-loader is locked . I've tried different solutions but non of the worked.
What to do please???
GlorySy said:
Hello all,
Anybody can help me, my problem is that my nexus 6p stuck on google screen (boot-loop), noting that unfortunately the boot-loader is locked . I've tried different solutions but non of the worked.
What to do please???
Click to expand...
Click to collapse
Install Wugfresh or any other toolkit of your choice to your PC, install drivers, install stock rom, follow onscreen instructions, done.
superviked said:
Install Wugfresh or any other toolkit of your choice to your PC, install drivers, install stock rom, follow onscreen instructions, done.
Click to expand...
Click to collapse
This won't work. The bootloader is locked and he has no way to unlock it.
GlorySy said:
Hello all,
Anybody can help me, my problem is that my nexus 6p stuck on google screen (boot-loop), noting that unfortunately the boot-loader is locked . I've tried different solutions but non of the worked.
What to do please???
Click to expand...
Click to collapse
Can you get into the stock recovery?
@GlorySy, you seem on the same issue as this. Please have a look and confirm it is what we got to worry. http://forum.xda-developers.com/nexus-6p/help/main-board-failure-story-t3409400
Not applicable
superviked said:
Install Wugfresh or any other toolkit of your choice to your PC, install drivers, install stock rom, follow onscreen instructions, done.
Click to expand...
Click to collapse
I cannot install any thing with locked boot loader :crying:
Yes
Heisenberg said:
Can you get into the stock recovery?
Click to expand...
Click to collapse
Yes I can, but can do nothing except for turn off the device. :crying:
GlorySy said:
Yes I can, but can do nothing except for turn off the device. :crying:
Click to expand...
Click to collapse
Go to my guide:
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928
Follow the instructions in section 13 to adb sideload one of the full OTA zips.
Heisenberg said:
Go to my guide:
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928
Follow the instructions in section 13 to adb sideload one of the full OTA zips.
Click to expand...
Click to collapse
I just started having this same issue.
I can't get into recovery from the bootloader in order to perform section 13. Once hit recovery, it's back to looping boot screen with white Google text.
Just got finished with Google phone support. They're sending me a new device. It must be a hardware failure.
Background: I got OTA notification on Friday night. I downloaded and hit install. Then after a while it said there was an upgrade error, and to please try again. But it was going to have to download the 1+ GB OTA file again, so I just said screw it, i'll do it later. Here am I 2 days later with a broken phone. Thinking this has to be related.
Stock phone, locked bootloader. Running 6.0.1
GlorySy said:
Hello all,
Anybody can help me, my problem is that my nexus 6p stuck on google screen (boot-loop), noting that unfortunately the boot-loader is locked . I've tried different solutions but non of the worked.
What to do please???
Click to expand...
Click to collapse
busbeepbeep said:
I just started having this same issue.
I can't get into recovery from the bootloader in order to perform section 13. Once hit recovery, it's back to looping boot screen with white Google text.
Click to expand...
Click to collapse
Please join this thread to help troubleshoot.
I am hoping to collect enough data to figure out a solution for all effected.
is your BL locked and device encrypted?
When you try to load recovery, does it ask for password?
try entering your last google account email password if so.
Help!! Stuck in Google screen
Heisenberg said:
Go to my guide:
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928
Follow the instructions in section 13 to adb sideload one of the full OTA zips.
Click to expand...
Click to collapse
Hi Heisenberg,
I ran into this problem today with my phone stuck on Google screen. I tried to use your guide and put my phone in recovery but it just goes back to rebooting and just shows the "Google" logo so if I can't get the phone into recovery then I won't be able to use your guide right? Is these any other way to solve this problem or am I screwed?
Also how can this problem be prevented in the future if I got new phone under warranty? Do I root and flash pure Nexus ROM and backup images?
Thanks,
Azeem00 said:
Hi Heisenberg,
I ran into this problem today with my phone stuck on Google screen. I tried to use your guide and put my phone in recovery but it just goes back to rebooting and just shows the "Google" logo so if I can't get the phone into recovery then I won't be able to use your guide right? Is these any other way to solve this problem or am I screwed?
Also how can this problem be prevented in the future if I got new phone under warranty? Do I root and flash pure Nexus ROM and backup images?
Thanks,
Click to expand...
Click to collapse
Hello... Try to look here:
https://forum.xda-developers.com/nexus-6p/help/boot-loop-death-nexus-6p-t3533528
For your second question, it's hard to tell... Making regular backups may help protecting your datas, but can't help your new phone to start acting crazy...
I have been doing weekly backups to my pc. I backup my TWRP, TBU, Super Backup, DCIM and download directories.
Sent from my Nexus 6P using XDA-Developers Legacy app
Heisenberg said:
Go to my guide:
http://forum.xda-developers.com/nexus-6p/general/guides-how-to-guides-beginners-t3206928
Follow the instructions in section 13 to adb sideload one of the full OTA zips.
Click to expand...
Click to collapse
Any ideas are any solution when I have custom rom?
EDIT: Not needed, seems that wife phone has motherboard problem because now it will stuck in TWRP screen.
I am pretty sure I had this problem before. Actually within hours of purchasing and rooting. Lol go into fastboot and install factory images. If you were able to get into recovery you could use adb to oem unlock.. but that doesn't sound like an option.
My phone died last night in a bootloop death. Thankfully here in the UK we have a 2 year warranty so Huawei are taking it back. I mentioned "bootloop issue" and the tech guy stopped asking the standard stuff and just sent me a returns bag.
Try this:
https://forum.xda-developers.com/nexus-6p/general/confirmed-hardware-defects-nexus-6p-t3610405
Quickly enable bootloader unlocking, then follow the tutorials already known for 4-core recovery
Well I've now got a different phone back from Huawei as they told me they no longer have replacement motherboards available.
Sent from my MHA-L29 using Tapatalk