yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] pndwal:
Many speeds and sizes in that article seem to be wrong. (SDHC up to 5 GB? No! Up to 32, and some hybrids are 64GB!. Speeds way off to!)

Our device / SOC supports SD 3.0 (UHS-I)

https://www.qualcomm.com/products/snapdragon-processors-410

https://kb.sandisk.com/app/answers/...c/sdxc-specifications-and-compatibility#speed

Sandisk Extreme A2 64Gb (don't know about Pro) is a UHS-I U3 (read higher speed bus architecture. U1 is the lower. There's no U2) SD card capable of 160MB/s read, and 60MB/s write speeds. However, we won't get these speeds on Y550.

This is because our 2014 phone / SOC only supports SD version 3.01, which was passed in 2010. The Application Performance Class specs for A1 and A2 were passed in 2016 with SD version 5.1.

https://www.pcworld.idg.com.au/article/657176/how-buy-best-sd-card-your-camera-phone-tablet/?pp=2

https://kb.sandisk.com/app/answers/detail/a_id/21206/~/sandisk-a2-microsd-cards

So while we don't get the enhanced A2 or even A1 speeds, we will get the native Ultra High Speed (UHS-I) bus data transfer rate of up to 104 MB/s. I guess that means we should get up to 104MB/s read, and 60MB/s write speeds with the Sandisk Extreme A2 64Gb. Still not bad! PW
[Android Q&A, Help & Troubleshooting] Saint_13:
one thing that i could mention is flashing any kind of GApps decrease performance very badly and phone will became laggy and sluggish. avoid GApps if you can.

and with that partiitoned adopted SD, some app's setting reset to default by turning phone off and on. in those case you must change their location to internal.

[MENTION=6951289]szty0pa[/MENTION]

I would like to do that, I'm also familiar with linux. can you provide some useful links. I searched for that but came up with nothing.
[Android Q&A, Help & Troubleshooting] fwiep:
7.1.2 update

Thanks to the LineageOS-developers and [MENTION=4479868]desalesouche[/MENTION], this is today's build containing the January-2020 security patches.

Recent changes: LineageOS 14.1

Kernel: https://github.com/HUAWEI-Y550-Y635/android_kernel_huawei_msm8916/commits/los-14.1

Update: download links have been removed. Please use the most recent ROM, see this link:

Unofficial LineageOS 14.1 (Android 7.1.2) ROM with June-2020 security patches

Known bugs:

- the WiFi MAC-address sometimes switches between a Huawei-prefix 68:a0:f6 and an Airgo-prefix 00:0a:f5 on reboot

Kind regards,

FWieP

---------- Post added at 21:46 ---------- Previous post was at 21:36 ----------

Thanks for the in-depth Linux advice. Leaving the GUI desktop and switching to the Ctrl+Alt+Fx text consoles is actually already part of my workflow. I discovered that my builds kept failing, even having closed all other applications but the graphical desktop itself. I'm a visually impaired screen-reader user, but even in a GUI - i LOVE the commandline. So, the TTY's are a welcome text-only advantage of any decent Linux.

I tried the suggestion of using Qemu and the underlying KVM. I didn't know my recent Linuxes already shipped a virtualization solution! I just always installed VirtualBox and got fed up with the awkward system integration, USB-passthrough and sound issues... That seems a bit better now. Will use them both until I make my choice. Thanks!

Kind regards,

FWieP
[Android Q&A, Help & Troubleshooting] pndwal:
Do you mean GApps generally? (or with Adopted Storage, or only with dual partitioned card?)

Also, any idea what GApps component slows things down? Thanks, PW
[Android Q&A, Help & Troubleshooting] bahram360:
Thanks [MENTION=7866480]fwiep[/MENTION] , and also we want miui 11 stable for Y550:cool:
[Android Q&A, Help & Troubleshooting] fwiep:
7.1.2 update

Thanks to the LineageOS-developers and @desalesouche, this is today's build containing the February-2020 security patches.

Recent changes: LineageOS 14.1

Kernel: https://github.com/HUAWEI-Y550-Y635/android_kernel_huawei_msm8916/commits/los-14.1

Update: download links have been removed. Please use the most recent ROM, see this link:

Unofficial LineageOS 14.1 (Android 7.1.2) ROM with June-2021 security patches

Known bugs:

- the WiFi MAC-address sometimes switches between a Huawei-prefix 68:a0:f6 and an Airgo-prefix 00:0a:f5 on reboot

Kind regards,

FWieP
[Android Q&A, Help & Troubleshooting] pndwal:
Heres something re. GApp's 'huge' impact, and good alternative method to run Google Apps. I wonder if MicroG method would be as effective for Y550?

https://xdaforums.com/xperia-sp/general/gapps-impact-rom-t3656685/post73780810 - PW
[Android Q&A, Help & Troubleshooting] Saint_13:
i tried several gapps and with all of them there is performance loss. i will try microG!
[Android Q&A, Help & Troubleshooting] pndwal:
Great! Look forward to hearing your results, and please post key methods if successful. :)

I'm wondering if this may also cure overheat issue, especially with Chrome. All best with it, PW.
[Android Q&A, Help & Troubleshooting] n1ckITA:
Corrupted internal storage

Hi guys, until yesterday I was an happy y550 user, thanks to fwiep, desalesouche and all LineageOS-developers, I had the latest LineageOS available for my phone. However now the internal storage get corrupted. I'm able to go in TWRP recovery but now there are this errors:

Failed to mount '/cache' (Invalid argument)
Failed to mount '/persist' (Invalid argument)
Failed to mount '/data' (Invalid argument)

I'm able to format the System partition but I'm not able to flash it.

If I try to flash an image or restore a TWRP backup, always end with an error, in fact I'm unable to flash anything except the boot partition.

I can use adb from recovery and go in edl mode with:

adb reboot edl

Otherwise if I try to go in bootloader the device will show as:

Product: QHSUSB__BULK
Manufacturer: Qualcomm CDMA Technologies MSM
05c6:9006 Qualcomm, Inc.

What do you think? Do you have any suggestions?

I think is better if i don't try to flash the original rom through EDL, because I'll lost TWRP.

Because I'm able to flash the boot partition, maybe is possible to flash a modified boot partition then install lineageOS on SD card.

PS: I already tried e2fsck but I had no luck.

Regards

Nick
[Android Q&A, Help & Troubleshooting] pndwal:
I'm afraid at first glance the prognosis for your phone is not good. Would be a bit better if you can confirm you were performing some kind of flash at the time problem began, or using any utilities that alter critical partitions in any way, or otherwise messing with or formatting such partitions. Please say if you did any of these things.

If you were just using the phone normally, it's likely you have simply suffered the inevitable effects of overheating, especially if you have noticed phone getting very hot. In your case apparently, this is emmc damage. This can't be fixed, but you may be able to test it with utilities like memory test in Huawei's HiSuite.

As noted previously:

Unfortunately, as [MENTION=6726815]Saint_13[/MENTION] has confirmed, "phone had overheating problem since it was new, especially using Chrome / Games, so I can say it's not because of custom ROMs, and with custom ROMs my phone runs much smoother and colder than stock ROM."

Seems other devices with SD410 suffer excessive heat, along with many SOCs from this generation.

Overheating has caused serious hardware damage on Y550 devices - phone no longer charges, USB mtp and tethering failure, emmc failure etc, so its a serious fault and should be avoided however possible.

Preventative measures:

- On recent ROMs, killing all apps when you don't use them (+ makes phone run smoother)

- Never charge, download and play at once

- Seems using MicroG and fake-GApps may fix heat problem, but I'm not sure why. Reading Page 644.

Hope this is helpful somehow. PW
[Android Q&A, Help & Troubleshooting] forjustin:
I have seen this before. Try to reinstall correct TWRP, then format data, reboot to recovery and flash rom.
[Android Q&A, Help & Troubleshooting] pndwal:
He has TWRP and previously flashed custom ROMs. - Do you think he now flashed the wrong one?...

He says nothing flashes from TWRP baring boot.img and he can't use Fastboot if PC only showing a QCom's QLoader (QPST / QFIL) diagnostic mode, which indicates critical partitions have been corrupted.

[MENTION=962426]n1ckITA[/MENTION] - I would however research and give DLoad recovery method a shot however... PW
[Android Q&A, Help & Troubleshooting] n1ckITA:
I was using the phone normally, and to be honest I don't upgrade often, usually every 4-5 mounths. About a mounth ago I had a bootloop on lineageos boot animation, at that time I just fhashed a backup of system and everything works until now.

I was using the phone normally, and my phone never get too hot. My use is very light and the battery lasted me two day.

I also think is the emmc, however I'd like to test. Do you know any linux tool? (I'm a linux user)

I don't think my phone was overheating, I used a Samsung S3 in past and I'm using it now... it's like a stove... the y550 is not.

However thank you, I'll try Huawei's HiSuite to test the memory and if I'm able to use it again, I won't use any gapps.

I used this phone for about 2 years... it's not the case. However thanks for the interest.

Thanks again.

In past, I had an another android phone that have limited storage, it was born with android 2.2 and at the end was able to flash cyanogenmod 11, but because of limited storage, the cyanogenmod's rom was too big for the internal storage, so the latest custom rom was installed on SD card. So it's technically possible to boot a custom rom from SD because I already tried, I'll research if I can boot lineageos from SD on y550.
[Android Q&A, Help & Troubleshooting] forjustin:
No.

And my response to n1ckiTA was not an attempt to undermine your apparent expertise.

Perhaps n1ckiTA has not tried to flash recovery, and perhaps the currnetly installed recovery has, for some reason, become corrupted. I have experienced this very scenario.
[Android Q&A, Help & Troubleshooting] pndwal:
Hey, sorry if my tone was at all harsh - didn't mean it to be - in fact I was just genuinely interested in you reasons / reasoning. We've all had different experiences of value with this tech, and everyone's help is appreciated here. (Probably should have waited for [MENTION=962426]n1ckITA[/MENTION] to respond, to be fair. Sorry mate.)

I'd be very interested if you actually had corrupted TWRP (memory) along with diagnostic mode showing on PC and were able to recover by reflashing TWRP and ROM. Please give details if that's possible.

Kind regards, PW.
[Android Q&A, Help & Troubleshooting] pndwal:
Still, phone is 6 years old, and 410 chipset is prone to this. Guess you could experience failure without excessive heat.

Sorry, only know of HiSuite mem test, but it's doubtful it will work with only QCom diagnostic connection.

I mentioned DLoad recovery because it does work with Y550, and has fixed bricked phones with no Recovery or FastBoot for some. It's a phone recovery protocol, and is not the same as installing ROM on SD. I have no experience with that, but what you say is interesting.

Check 'Y550 Development' thread, Post #2 maintained regularly by [MENTION=6726815]Saint_13[/MENTION] for all Y550 related files and tips:

https://xdaforums.com/android/development/huawei-y550-development-t3425524

See 'Ive Bricked My Phone' here for DLoad method.

Tip: view this post post in browser. XDA Labs app doesn't handle formatting properly, and makes it hard to navigate.

Nb. Dload or other methods (Qualcomm QDLoader, etc) should work as long as you use factory ROM compatible with your xloader.img version. (Ie. select same version as your last stock if possible).These ROMs can be obtained from official site: http://huawei-firmware.com/phone-list/huawei-ascend-y550

Nb. Some have permanently bricked their devices (no methods to restore work) after rolling back to a ROM with older xloader, or flashing a ROM with different xloader.

WARNING To Others who want to customise Y550:

It seems Huawei updated XLoader on B249 and later in a number of regions. Problems relate to xloader.img updates to bootloader from version 0 to version 1 or version 1 to version 2 which prevents rollback to earlier ROM's using lower xloader versions, and other patches that break root (though magisk now has a workaround requiring manual creation of boot.img), as well as problems using TWRP and custom ROMs (which have been made using lower XLoader), and unlocking bootloader with legacy (the only) methods.

Also, in case DLoad doesn't work, but you have somehow experienced an inexplicable EMMC corruption without permanent damage as [MENTION=6994081]forjustin[/MENTION] and I believe others have experienced, you can investigate rebuilding EMMC. Involves using QCom's flashing utilities, QFIL, QDLoader etc. Read Pages 610-612 here. [MENTION=9078544]x.ak****[/MENTION] gave advice on fixing SnapDragon 410 devices there. I think I found applicable firehose files and other relevant info too. May need to restore unique numbers like IMEI, SN, BT and WiFi MAC addresses also after successful EMMC rebuild. PW
[Android Q&A, Help & Troubleshooting] bahram360:
I transferred the installed applications to root/system , Now I have more free space
[Android Q&A, Help & Troubleshooting] pndwal:
Are you using adopted storage? Or do you mean system memory is full? PW
[Android Q&A, Help & Troubleshooting] bahram360:
Im using SD card as portable storage , yes
[Android Q&A, Help & Troubleshooting] pndwal:
Just reread your post. - I'd misread it - thought you meant you had run out of storage space :laugh:

Personally, I keep system just for system apps as it's limited in size anyway. Works well with Pico or nano GApps. I'd ensure you regularly integrate system updates (or flash latest GApps package) as these otherwise waste space on Internal, more over time. Also, enabling 'Force allow apps on external' in Developer Options makes any app eligible to be written to external adopted storage, regardless of Devs manifest values, and will free up much internal memory since many Devs don't enable this. Nb. you may need to move some apps back if they need root permission, associated widgets don't work, etc. See my tips in full at post #6342.

(Just realised you have long time experience with Y550, but this may help others.) PW
[Android Q&A, Help & Troubleshooting] itsmefarhan:
Hello. my stock y550 stuck at boot logo. I rebooted into recovery and tried to wipe data / factory reset, mount cache fail and mount data fail repeatedly appeared and then it says shutdown system now.

When i try to flash via sdcard (volume up, down and power), it doesnt start installation infact it takes me back to recovery mode again.

When i try volume down and power key, screen goes black and blue notification light starts blinking.

Is there any other way to flash rom?
[Android Q&A, Help & Troubleshooting] Wasil8888:
Hello guyz, I have to first unlock bootloader to flash any ROM for example LineageOS or Mokee? In Fastboot mode I have bootloader locked message. How to unlock it? Phone: G620S-L01.
[Android Q&A, Help & Troubleshooting] pndwal:
So you have TWRP recovery with stock ROM? Tried flashing a custom ROM from TWRP? PW

---------- Post added at 01:05 PM ---------- Previous post was at 01:04 PM ----------

Answered in correct thread. :)

https://xdaforums.com/honor-4x/development/rom-lineageos-14-1-huawei-g620s-honor-4-t3547682/page63 PW
[Android Q&A, Help & Troubleshooting] Wasil8888:
Can You help me to find the answer how to unlock it?
[Android Q&A, Help & Troubleshooting] pndwal:
Mate, I did! Please read the post I pointed to at the top of that page. Quite long, I realise, but you shouldn't contemplate modding phones without digesting such information. :) Also, unlocking solution is a bit more involved now than it used to be. PW
[Android Q&A, Help & Troubleshooting] Wasil8888:
Ahhh yes I found it Thank You. I already get bootloader code from DC-Unlocker but where I have to enter this code?
[Android Q&A, Help & Troubleshooting] itsmefarhan:
[MENTION=7550078]pndwal[/MENTION]

no, stock recovery, phone is not rooted.
[Android Q&A, Help & Troubleshooting] pndwal:
Well, sorry, but looks likely EMMC memory is damaged from overheating, which is common with Y550. See my post #6652.

Could try a DLoad flash in case EMMC memory somehow recovered (read my other posts on page 666), but this is highly unlikely. May be time for an upgrade. :( PW

---------- Post added at 09:17 PM ---------- Previous post was at 09:13 PM ----------

I understand you've now successfully entered code thru ADB and unlocked G620S. Well done! PW
[Android Q&A, Help & Troubleshooting] fwiep:
7.1.2 update

Thanks to the LineageOS-developers and @desalesouche, this is today's build containing the March-2020 security patches.

Recent changes: LineageOS 14.1

Kernel: https://github.com/HUAWEI-Y550-Y635/android_kernel_huawei_msm8916/commits/los-14.1

Update: download links have been removed. Please use the most recent ROM, see this link:

Unofficial LineageOS 14.1 (Android 7.1.2) ROM with June-2021 security patches

Known bugs:

- the WiFi MAC-address sometimes switches between a Huawei-prefix 68:a0:f6 and an Airgo-prefix 00:0a:f5 on reboot

My personal Y550's wifi has died, so I cannot test any wifi-related features.

There is a chance I'll get my secondary Y550 back, but that will take some time (months).

Kind regards,

FWieP
[Android Q&A, Help & Troubleshooting] GotoDengo:
Thanks again. Works like a charm :)
[Android Q&A, Help & Troubleshooting] bahram360:
Android 10 ?
[Android Q&A, Help & Troubleshooting] pndwal:
Please search for LOS 15.1 in this thread to understand progress to date, and problems getting O or P, let alone Q (10). Or start here:

https://xdaforums.com/android/help/to-root-huawei-y500-t2923318/post78135260

https://xdaforums.com/android/help/to-root-huawei-y500-t2923318/post79654753

https://xdaforums.com/android/help/to-root-huawei-y500-t2923318/post79982379 PW
[Android Q&A, Help & Troubleshooting] fwiep:
7.1.2 update

Thanks to the LineageOS-developers and @desalesouche, this is today's build containing the April-2020 security patches.

Recent changes: LineageOS 14.1

Kernel: https://github.com/HUAWEI-Y550-Y635/android_kernel_huawei_msm8916/commits/los-14.1

ZIP: lineage-14.1-20200428-UNOFFICIAL-y550.zip

MD5: lineage-14.1-20200428-UNOFFICIAL-y550.zip.md5

ASC: lineage-14.1-20200428-UNOFFICIAL-y550.zip.md5.asc

Known bugs:

- the WiFi MAC-address sometimes switches between a Huawei-prefix 68:a0:f6 and an Airgo-prefix 00:0a:f5 on reboot

My personal Y550's wifi has died, so I cannot test any wifi-related features.

There is a chance I'll get my secondary Y550 back, but that will take some time (many months).

Edit: Removed obsolete download links.

Kind regards,

FWieP
[Android Q&A, Help & Troubleshooting] bahram360:
My smart phone gets hot in the summer using Lineage os when work in charging mode
[Android Q&A, Help & Troubleshooting] pndwal:
https://xdaforums.com/android/help/to-root-huawei-y500-t2923318/post81957027 PW
[Android Q&A, Help & Troubleshooting] GotoDengo:
Thanks again for your work. You're keeping my Y550 going. :)
[Android Q&A, Help & Troubleshooting] bahram360:
What's link , i want one method for reduce battery charging ampere or voltage
[Android Q&A, Help & Troubleshooting] pndwal:
Sorry, I have no method other than those mentioned in linked post.

Kernel Adiutor mods / settings would have been nice, but these don't play nicely with our kernel and none seem to work. (We did have this ability with Nato's custom Soviet Kernels and OctOS ROMs, but these are comparatively old now, and out of date.) PW
[Android Q&A, Help & Troubleshooting] GotoDengo:
So wanting to try out a different SIM in my phone, I took off the back cover, removed the battery, swapped SIMs, replaced the battery and tried to get the back cover on but it wouldn't snap shut!?

It turned out that the battery had expanded to about twice it's thickness! It's the original battery that came with the phone.

Needless to say I dropped it into a battery recycling station and have ordered a 'genuine' replacement from AliExpress which I'm waiting for now.

So please check your batteries! ;)
[Android Q&A, Help & Troubleshooting] fwiep:
7.1.2. update

Thanks to the LineageOS-developers and @desalesouche, this is today's build containing the May-2020 security patches.

Recent changes: LineageOS 14.1

Kernel: https://github.com/HUAWEI-Y550-Y635/android_kernel_huawei_msm8916/commits/los-14.1

ZIP: lineage-14.1-20200606-UNOFFICIAL-y550.zip

MD5: lineage-14.1-20200606-UNOFFICIAL-y550.zip.md5

ASC: lineage-14.1-20200606-UNOFFICIAL-y550.zip.md5.asc

Known bugs:

- the WiFi MAC-address sometimes switches between a Huawei-prefix 68:a0:f6 and an Airgo-prefix 00:0a:f5 on reboot

My personal Y550's wifi has died, so I cannot test any wifi-related features.

There is a chance I'll get my secondary Y550 back, but that will take some time (many months).

Edit: Removed obsolete download links.

Kind regards,

FWieP
[Android Q&A, Help & Troubleshooting] fwiep:
7.1.2. update

Thanks to the (mighty quick!) LineageOS-developers this is today's build containing the June-2020 security patches.

Recent changes: LineageOS 14.1

Kernel: https://github.com/HUAWEI-Y550-Y635/android_kernel_huawei_msm8916/commits/los-14.1

ZIP: lineage-14.1-20200609-UNOFFICIAL-y550.zip

MD5: lineage-14.1-20200609-UNOFFICIAL-y550.zip.md5

ASC: lineage-14.1-20200609-UNOFFICIAL-y550.zip.md5.asc

Known bugs:

- the WiFi MAC-address sometimes switches between a Huawei-prefix 68:a0:f6 and an Airgo-prefix 00:0a:f5 on reboot

My personal Y550's wifi has died, so I cannot test any wifi-related features.

There is a chance I'll get my secondary Y550 back, but that will take some time (many months).

Edit: Removed obsolete download links.

Kind regards,

FWieP
[Android Q&A, Help & Troubleshooting] GotoDengo:
Thanks again for your efforts!
[Android Q&A, Help & Troubleshooting] fwiep:
Tutorial update

Hello all,

These days, I reinstalled my dualboot system of Debian (primary) and Ubuntu Studio (music production and Y550-building).

I followed my own tutorial, and found some small errors since the upgrade to v. 20.04 LTS.

To be specific:

- the package libncurses5 has to be installed (alongside or instead of libncurses5-dev, I don't know).

- the package libwxgtk3.0-dev is not (yet) available for Ubuntu 20.04. I removed it from the apt command and my subsequent build succeeded anyway.

I edited the mentioned tutorial accordingly.

Kind regards,

FWieP
[Android Q&A, Help & Troubleshooting] Saint_13:
thank you very much, in summer if i find some free time i will try your tutorial.
[Android Q&A, Help & Troubleshooting] SurvivorArk:
a stable rom for this phone?

i need a second phone so the only thing i wish is stability

which one do you recommend?

thanks