yashsingh1/xdaforums huggingface dataset:
[Galaxy S 4 i9505 Android Development] a103:
Got you, that's something only op can comment on [emoji3]
[Galaxy S 4 i9505 Android Development] sicHiRsch:
I am running a modified version of this kernel for the S4 Active (i9295). Since installing it I cannot connect to my university's wifi anymore, which uses PEAP MSCHAPv2 for authentication. My WPA wifi at home works without problems. Has anyone with a 'normal' S4 had any problems with wifi authentication?

Cheers
[Galaxy S 4 i9505 Android Development] slim80:
Imperium LL Kernel v2.5 online.

I suggest you to flash the cleaning kernel script before to install the new kernel.
[Galaxy S 4 i9505 Android Development] radz_:
Wow! Outstanding work [MENTION=4543502]slim80[/MENTION]

Salute!... this is a great update...

Edit... an hour after flash....

I must say, this update is tremendous!

Best kernel version.... excellent work slim80...
[Galaxy S 4 i9505 Android Development] slim80:
Thanks mate

:)
[Galaxy S 4 i9505 Android Development] epicboy:
I see this kernel says it's for 5.0.1 but it's included in albe rom 5.1.1. Is it safe to install on 5.1.1 or were changes made in order for it to be compatible?
[Galaxy S 4 i9505 Android Development] RayySP:
Albe rom is base on 5.0.1, he only change to 5.1.1 in build.prop.

Sent from my SM-G920F
[Galaxy S 4 i9505 Android Development] Gamer-king:
Now that version 2.5 is out here are my updated settings:

CPU

DEFAULT CPU GOVERNOR: Intelliactive or Interactive. For me Intelliactive is snappier.

VOLTAGES: -12500 or -1 step

HOTPLUG

HOTPLUG MECHANISM: MPDecision you can also try Intelli-Plug if you want to save more battery.

CPU MAX SCREEN OFF FREQ: 384000 If you are facing issues just use the next step until the issues are gone.

I/O

SCHEDULER INTERNAL AND EXTERNAL: sio you can also try FIOPS if you want to save more battery.

READ-AHEAD INTERNAL AND EXTERNAL: 2048 kB

MISC

DISABLE ANDROID LOGGER

ZRAM DISK SIZE: 1000 MB

SWAPPINESS: 90%

TCP CONGESTION CONTROL METHOD: westwood
[Galaxy S 4 i9505 Android Development] epicboy:
You're sure that the voltages are -125000?

And is there a quick way to subtract the voltages rather than manually doing every one?

Sorry I'm a noob when it comes to kernels
[Galaxy S 4 i9505 Android Development] kevinrubio1:
I tried to flash it and it gave me an error about opening up the zip file
[Galaxy S 4 i9505 Android Development] slim80:
I think that the file is broken. Did you check the md5sum?

So... you can download the latest version here:

https://www.dropbox.com/sh/96w5vb5m...Uf5a/Kernel/Imperium_LL_Kernel_v2.5a.zip?dl=0
[Galaxy S 4 i9505 Android Development] kevinrubio1:
thank you, that link worked perfectly!
[Galaxy S 4 i9505 Android Development] CrazyKarl12:
[MENTION=4543502]slim80[/MENTION] what cpu max screen off freq can you recommend on intelliplug?
[Galaxy S 4 i9505 Android Development] radz_:
[MENTION=4543502]slim80[/MENTION]

I just noticed something,

eversince i have been using Faux123 for Kernel Control... however with this version, if i reboot my phone.. my settings keep going back to default?

Any idea why?
[Galaxy S 4 i9505 Android Development] chashmaa:
Bro one stupid question which different between imperial LL kernel for s4 and imperial kernel for s4?
[Galaxy S 4 i9505 Android Development] radz_:
LL - Lollipop - 5.x

Imperium Kernel - KitKat 4.4.2
[Galaxy S 4 i9505 Android Development] chashmaa:
Bro now I have phoenix rom with imperial 2.4 kernel. For 2.5a need cleaning script or direct flashing?
[Galaxy S 4 i9505 Android Development] slim80:
Low freq for reduce battery drain.

Yes. Because STweaks set the parameters at the boot.

Yes.
[Galaxy S 4 i9505 Android Development] chashmaa:
Yes mean direct flash?
[Galaxy S 4 i9505 Android Development] slim80:
Kernel cleaning before to install the new kernel.
[Galaxy S 4 i9505 Android Development] moviecut:
If there is no negative impact, couldnt you just include thw kernel cleaning script before the kernel flash?

Gesendet von meinem GT-I9295 mit Tapatalk
[Galaxy S 4 i9505 Android Development] Gamer-king:
Oh that is a typo thanks for making me notice that mate. Unfortunately there is no way to lower every voltage with one click. You have to lower it manually one by one. My advice click on apply after you lowered one step.
[Galaxy S 4 i9505 Android Development] javitolopez69:
What recomend 2.5 or 2.5a.

??
[Galaxy S 4 i9505 Android Development] Gamer-king:
If you use powersaving mode 2.5a otherwise you can use 2.5
[Galaxy S 4 i9505 Android Development] javitolopez69:
2.5a is Best for battery ? Friend .

??
[Galaxy S 4 i9505 Android Development] Gamer-king:
Yes it is better for battery cause zen_desicion was good for performace but also had a little impact on battery. Version 2.5a has no zen_desicion. Use my settings I posted for 2.5 for good battery.
[Galaxy S 4 i9505 Android Development] javitolopez69:
Ok i test 2.5a for this Day .thanks

??
[Galaxy S 4 i9505 Android Development] radz_:
Hmm.. thanks for sharing mate.. i learned something from this post..

[MENTION=4543502]slim80[/MENTION] / anyone please share the link of 2.5...

I deleted it.. i have 2.5a now right now. But i dont use power saving.. so i think 2.5 is best for me..
[Galaxy S 4 i9505 Android Development] Gamer-king:
You are welcome mate. If you have version 2.5 running again can you do me a favor and test if the device really reboots when you enable powersavingmode and zen_decision is enabled?
[Galaxy S 4 i9505 Android Development] radz_:
I don't have version 2.5,.. do you have a link?

I don't use powersaving at all, so i want 2.5..

i can test it for you...
[Galaxy S 4 i9505 Android Development] Gamer-king:
Sry I don't have a link. Unfortunately I deleted version 2.5 from my device. Maybe anyone else still has the zip file.
[Galaxy S 4 i9505 Android Development] davy4475:
https://www.dropbox.com/s/lietkhrwo70b53j/Imperium_LL_Kernel_v2.5.zip?dl=0 try this guys [MENTION=5140419]radz.min[/MENTION]
[Galaxy S 4 i9505 Android Development] radz_:
Just flash 2.5 mate, and yes my phone rebooted when i enable powersaving..

PS: i cant confirm if its a kernel issue or ROM issue, for now im using Phoenix. I never use powersaving, its just my first time to enable it.. never tried to enable using 2.5a...

I forgot to test it before flashing 2.5.. stupid me!

Thanks mate... works fine..
[Galaxy S 4 i9505 Android Development] javitolopez69:
You test 2.5

I test 2.5a ???

What is the Best ........???

??
[Galaxy S 4 i9505 Android Development] radz_:
What ROM are you using bro?
[Galaxy S 4 i9505 Android Development] javitolopez69:
I use lollirom v5 .

No offense to others developers .

??
[Galaxy S 4 i9505 Android Development] radz_:
Just wanted to test powersaving on 2.5 and 2.5a if its really rebooting...

But we have a diff ROM... so never mind..lol
[Galaxy S 4 i9505 Android Development] Gamer-king:
Ok thx mate. Can you pls disable zen_decision in sTweaks reboot your device and enable powersaving mode and see if it happens again? TIA
[Galaxy S 4 i9505 Android Development] slim80:
Men, i think that's not a kernel issue. I tried with the stock kernel and i have force reboot too with Imperium v9.1. Please, confirm that with other ROM you don't have this problem.

I will check the issue in my ROM
[Galaxy S 4 i9505 Android Development] radz_:
+1

I think not a kernel issue as well...
[Galaxy S 4 i9505 Android Development] droidblitz:
Been using powersaving mode eversince i flashed imperium v9.1 with kernel v2.5

So far no random reboots.

Stweaks all default settings.
[Galaxy S 4 i9505 Android Development] rolandvrielink:
Is there an description of the powersaving mode?
[Galaxy S 4 i9505 Android Development] Gamer-king:
It is the samsung powersaving mode. When you enable it it reduces cpu freq and turns of cores and lower the brightness etc.
[Galaxy S 4 i9505 Android Development] rolandvrielink:
Thank you for your answer
[Galaxy S 4 i9505 Android Development] kevinrubio1:
what are the best settings (updated with the latest version) for performance and battery? I can never hit 3.5 hours of SOT :(
[Galaxy S 4 i9505 Android Development] awerqw22:
+1
[Galaxy S 4 i9505 Android Development] Redflea:
[MENTION=4543502]slim80[/MENTION], any comment?
[Galaxy S 4 i9505 Android Development] Gamer-king:
Here are my settings:

CPU

DEFAULT CPU GOVERNOR: Intelliactive or Interactive. For me Intelliactive is snappier. You can also try Intellidemand or Yankactive. You should test each of those governors for a week.

VOLTAGES: -1 step

HOTPLUG

HOTPLUG MECHANISM: MPDecision you can also try Intelli-Plug if you want to save more battery. I use Intelli-Plug now.

CPU MAX SCREEN OFF FREQ: 384000 If you are facing issues just use the next step until the issues are gone.

GPU

DEFAULT GPU GOVERNOR: simple

VOLTAGES: -1 step

I/O

SCHEDULER INTERNAL AND EXTERNAL: sio you can also try FIOPS if you want to save more battery. I use FIOPS now.

READ-AHEAD INTERNAL AND EXTERNAL: 2048 kB

MISC

DISABLE ANDROID LOGGER

ZRAM DISK SIZE: 1000 MB

SWAPPINESS: 90%

TCP CONGESTION CONTROL METHOD: westwood
[Galaxy S 4 i9505 Android Development] Leejay1953:
Sorry if I disagree. I tried these settings for a few days but noticed that my battery goes down much faster. I went back to Barry Allan governor and kept the other settings on default with the exception of Android logger and ZRAM both off. I also don't understand the rationale of such huge ZRAM of 1GB?! I am a moderate user, a few phone calls, WhatsApp, music streaming, mainly on WiFi. Never play games on my mobiles. LJ
[Galaxy S 4 i9505 Android Development] Gamer-king:
Can someone pls give me any further infos about the barry_allen governor and tell me why there is so much hype about it?
[Galaxy S 4 i9505 Android Development] Leejay1953:
Maybe it's the name ?[emoji3]

Somebody said that BA gov comes from S 6. According to my experience it's slightly better than all the rest I tried. Bottom line for me is, LL 5.0x is just inferior to KK in terms of battery life. You can tweak the kernel till you are blue in the face but you will never get to KK level. I hope 5.1 will bring some positive change. Till then ...cheers. LJ
[Galaxy S 4 i9505 Android Development] Gamer-king:
Did you try every single governor?
[Galaxy S 4 i9505 Android Development] esepedazogsi:
Sorry but this is what i see about it:

Barry-Allen

It's based on interactive. The governor is supposed to be more battery friendly and at the same have good performance.

Regards
[Galaxy S 4 i9505 Android Development] Gamer-king:
That is exactly the same info I found. Thx anyway.
[Galaxy S 4 i9505 Android Development] Leejay1953:
No. Mostly those and the settings that were recommended by others. LJ
[Galaxy S 4 i9505 Android Development] droidblitz:
Check this out

The first time I install Imperium Kernel with imperium Rom

All stock settings didnt touch anything just installed my main apps COC / Fb /Viber / Tapatalk / Chrome / Youtube

Use you Phone as normal let it calibrate or you can use a Battery Calibration app...

After a few day i did some tweaks to the kernel undervolt ( Less heat ) and underclock since im only using phone for playing COC

http://xdaforums.com/galaxy-s4/i9505-develop/rom-imperium-ll-v1-0-t3046889/page269 :D
[Galaxy S 4 i9505 Android Development] liddodragon:
Any mirror link for the kernel download? I keep getting an error. The cleaning kit downloads fine.
[Galaxy S 4 i9505 Android Development] esepedazogsi:
Hi,

I can download it from the post 1. Maybe you are using an adblock?

Regards
[Galaxy S 4 i9505 Android Development] moviecut:
Can the stagefright-bug be fixed in this kernel? Or is it a system-thing? www.androidauthority.com/how-is-goo...that-affects-95-of-all-android-phones-631560/

Gesendet von meinem GT-I9295 mit Tapatalk
[Galaxy S 4 i9505 Android Development] Hybridmax:
No this Security Bug can't be fixed with the Kernel...

The newest Smartphones like Galaxy S6 / S6 Edge will get this Security Patch very soon and i think the older Smartphones will follow soon.
[Galaxy S 4 i9505 Android Development] mariusbarosanul:
AFAIK, Google is trying to fix the Messaging app first hand, to prevent the flaw, so maybe slim can implement that fix in his ROM
[Galaxy S 4 i9505 Android Development] kfallz:
Depending on what sms app you're using it might already be fixed, I use chomp sms for example, they had a fix preventing stagefright recently.
[Galaxy S 4 i9505 Android Development] abescalamis:
Which settings will you recommend?
[Galaxy S 4 i9505 Android Development] Leejay1953:
If you are looking for recommendations do a search in this thread. LJ
[Galaxy S 4 i9505 Android Development] NeosHaruki:
Will this work with lollipop rom (non custom rom)
[Galaxy S 4 i9505 Android Development] radz_:
Yes.. as long as its a TW base lollipop
[Galaxy S 4 i9505 Android Development] kofe:
And as long as it`s rooted and has a custom recovery. :)
[Galaxy S 4 i9505 Android Development] abescalamis:
Not really, but you said that you did tried settings recommended by others and they didn't work, and I'm wondering what did work for you and maybe might also works for me.
[Galaxy S 4 i9505 Android Development] edzamber:
O.T :

I,'ve Build a Stagefright Fix for i9505 Lollipop Stock based Rom :)

http://xdaforums.com/showthread.php?p=62326930
[Galaxy S 4 i9505 Android Development] edzamber:
Damn !!!

New Stagefright Detector Update, New vulnerability...

So waiting for new Samsung Update...

http://xdaforums.com/showthread.php?p=62332530
[Galaxy S 4 i9505 Android Development] xell75:
I can confirm this, just flashed the fix and tested it on Albe95 S6 port. :(
[Galaxy S 4 i9505 Android Development] icedef:
Noob question! How do I know if I am on a TW version? :confused::D
[Galaxy S 4 i9505 Android Development] kevinrubio1:
I got 4/7 red ones :( should I flash it? I'm not sure what the red ones mean exactly, and how it affects my phone. Can someone help me understand and recommend if I should flash the fix or not?
[Galaxy S 4 i9505 Android Development] a103:
By looking at it [emoji12]
[Galaxy S 4 i9505 Android Development] xell75:
I don't know how they affect my phone too, but I would recommend to flash it, because as you see in my screenshot, only one vulnerability is left and I think it will reduce the risk, that anything can happen through the vulnerability. :)
[Galaxy S 4 i9505 Android Development] RayySP:
I follow the instructions on the blog which say to off auto retrieve mms. I hope it will help protect somehow.

Sent from my GT-I9505
[Galaxy S 4 i9505 Android Development] NeosHaruki:
What settings on stweaks would give me sufficient performance and battery? (stock touch wiz non custom rom)
[Galaxy S 4 i9505 Android Development] pattriccio:
Use

Impulse governor undervolt cpu by 50000 undervolt gpu by 75000 set max cpu to 130000 something.set gpu to max 320. Sio 1024 internal and external. Turn off android logger and vram. Xhange cubic to westwood in misc. I have 3hrs and 30min screen rime with wifi on data off. And still have 35 percent of juice.
[Galaxy S 4 i9505 Android Development] Buckycasuals:
Your device must be crawling with your settings considering everyone is trying to increase performance while having a battery life.
[Galaxy S 4 i9505 Android Development] pattriccio:
Nahhh i got 27 apps installed and greenify all of it. Facebook youtube messenger plants vs zombies2 and etc. And its still works fine. Btw im not a hardcore gamer like nba etc and im using the s6 rom.
[Galaxy S 4 i9505 Android Development] Lucius1972:
Thx slim80. This is a kick ass kernel.

CPU: arteractive

CPU undervolt -25.000

Intelliplug enabled

GPU governor: simple

GPU undervolt -25.000

I/O fiops

Read ahead internal: 512

External: 1024

Android logger, zram disabled

TCP congestion: Westwood
[Galaxy S 4 i9505 Android Development] jedi134:
Why no NTFS support? Would this be difficult to add to this kernel? I would fine this very useful..
[Galaxy S 4 i9505 Android Development] esepedazogsi:
Did you try to execute es file explore with the usb key plugged? I can read ntfs with es file explore. Try it

Regards
[Galaxy S 4 i9505 Android Development] Haxz0rz1337:
Can you change the boot logo to look like this?

I would need this for Albe95 ROM.

Thanks in advance mate.
[Galaxy S 4 i9505 Android Development] a103:
AFAIK the boot logo can't be changed.
[Galaxy S 4 i9505 Android Development] Haxz0rz1337:
Back when I was using Xperia Z Ultra there were a lot of kernels with changed logo so...but this is Samsung so maybe you are rirht.
[Galaxy S 4 i9505 Android Development] Lucius1972:
The best I can do [emoji6]
[Galaxy S 4 i9505 Android Development] jedi134:
Yep I've always used es file Explorer and it never shows NTFS formatted devices? I have 9.1 imperium rom installed and 2.5a imperium kernel,,, still no NTFS?

My note 10.8 reads NTFS on stock rooted rom... I don't think my s4 on any Rom has read NTFS?
[Galaxy S 4 i9505 Android Development] Ricardo_Is:
Very nice mate!

Can you tell me which rom and battery you have? 2600 mAh?

I never had 6 hours of SOT with Lollipop.
[Galaxy S 4 i9505 Android Development] Lucius1972:
I'm on Osiris 3 and have the stock battery.
[Galaxy S 4 i9505 Android Development] Bmsone:
Did you use flight mode on that? No signal and no mobile data for 71%? Awesome screen time anyway.

Skickat från min GT-I9505 via Tapatalk
[Galaxy S 4 i9505 Android Development] myawan:
Your stats show you were in the airplane mode most of the time......What about processor state? Can you share that as well?
[Galaxy S 4 i9505 Android Development] NeosHaruki:
I've been using this kernel for a couple of weeks and it was working fine. I went on stweaks and it showed 'No kernel support'

Restarted the phone but it kept showing it. Any solution?
[Galaxy S 4 i9505 Android Development] rolandvrielink:
Reflash the kernel should work
[Galaxy S 4 i9505 Android Development] subscope:
Nice! :D Can you share your settings please? :) thanks
[Galaxy S 4 i9505 Android Development] Lucius1972:
See post #697
[Galaxy S 4 i9505 Android Development] rolandvrielink:
Maybe a stupid question but at post #697 cpu underbody -25.000 -> you lowered all those values? ?
[Galaxy S 4 i9505 Android Development] Lucius1972:
Yes, all CPU and GPU frequancies
[Galaxy S 4 i9505 Android Development] rayman95:
Which program are you using to tweak it?? Thanks
[Galaxy S 4 i9505 Android Development] esepedazogsi:
Stweaks, when you flash the imperium kernel , stweaks will copy into priv app.

Regards
[Galaxy S 4 i9505 Android Development] lawyer_06:
Hi everybody!

I want to share my recent battery statistics that i have gotten with Imperium LL Kernel.. I shared it on the ROM thread that i am using, but i want to share also here so more people could benefit by it..

- 17 hours 30 min standby time,

- 6 hours 20 min screen on time (with 6+ hours active wi-fi usage),

** During these statistics, my Power Saving Mode (PSM) was

OFF

. I especially kept it off, because when it is being activated, as i noticed it restrics the maximum CPU frequency to 1350 MHz, and thus it could sometimes give the feel of as phone is laggy. The reason is; the CPU Governor that i choose (IntelliMM) also reduce the CPU usage by itself, so also activating PSM would mean restricting the CPU by two sides, so it could cause a laggy phone. Therefore, for a fluid and smooth phone usage i kept it off.

I got these statistics with Imperium LL Kernel

v1.9

. Yeah, v1.9, not the last version (v2.5a). :) I don't know what is the secret of version 1.9, but, between all Imperium LL Kernel versions, "with the same configuration" (setting the same CPU/GPU Governors and I/O Schedulers and the same configuration on all versions) that version always gave me the best battery statistics. Maybe it depends on my phone usage pattern, so i don't know if it will give the same battery friendly statistics to everyone. But i came to this conclusion by doing lots of tests till now. And i can say the second more battery friendly version is Imperium LL Kernel v2.3.

Beside these, between all CPU Governors, the "IntelliMM" CPU Governor always gave me the best Screen On Time. And i can say the minimum wakelocks. But i want to especially state that, just these choices in Kernel (i mean CPU/GPU Governors - I/O Schedulers) could not give a good battery life without using the tips in MY GUIDE. I got all these statistics by also applying the tips in my mentioned guide.) I think the trick of that Governor is most of the time running the CPUs on 384 MHz. Look at the marked last screenshot below, you will see what i mean. :)

Thanks to [MENTION=4543502]slim80[/MENTION] for such a good Kernel.. And i think slim80 could explain the reason of why the version 1.9 is more battery friendly. :) (Or maybe it is just battery friendly for me :D). I looked at the changelog of the Kernel versions that slim80 has released untill now and i tried to find the difference between Kernels, but there are some technical terms that should be explained, i think. That technical terms exceed the knowledge of an average member and it needs to be explained by an expert (and that expert is slim80).. :)
[Galaxy S 4 i9505 Android Development] kevinrubio1:
is there a way to download old versions of the kernel?
[Galaxy S 4 i9505 Android Development] jgchaval:
Where can I find your kernel settings for Imperium Kernel? I read yor guide and it's awesome, but I couldn't find the settings for CPU/GPU Governor, I/O Scheduler and all that stuff. Maybe I missed them, could you point me in the right direction so I can try them? :D

Thanks man, great guide BTW!
[Galaxy S 4 i9505 Android Development] lawyer_06:
I don't know if the old versions are available on @slim80's database. But if he doesn't have the former versions and if he gives the permission to share, i can upload and share with everyone.

Thanks for kind words.. :) Yes, i haven't updated my guide so you can't find the Kernel configuration of my this battery statistics on My Guide. You can find there my general tricks.. So i will share the settings of this statistics here:

My Kernel settings on Imperium LL Kernel v1.9:

CPU tab

:

* HOTPLUG MECHANISM: Intelli-Plug

* DEFAULT CPU GOVERNOR : Intellimm

* CPU MAX FREQUENCY: 1674 MHz

GPU tab:

* DEFAULT GPU GOVERNOR: Simple

* GPU MAX FREQUENCY: 320 Mhz

I/O tab:

* DEF. I/O SCHEDULER FOR INTERNAL STORAGE: sio

* INTERNAL STORAGE READ-AHEAD: 1024 kB

* DEF. I/O SCHEDULER FOR SD-CARD STORAGE: sio

* SD CARD READ-AHEAD: 1024 kB

MISC tab:

* ANDROID LOGGER;

- Enable Android Logger: OFF (DISABLED) (After you disable the Android Logger, if your Cat Log or any other apps for Logging don't work properly, then the culprit could be this setting, so to make it working just enable Android Logger again.)

* VIRTUAL MEMORY;

- zRAM: OFF (DISABLED)

* TCP CONGESTION CONTROL;

- Tcp Congestion Control Method: westwood

*** Except the configuration i have mentioned above, the remain settings under the other TABs and the CPU/GPU Min-Max Voltages are DEFAULT. But you can set the other settings under the other TABs due to your needs.

*** Before flashing the new Kernel, always flash the Kernel Cleaning Script first.

*** After you flash a new Kernel, i suggest to be patient and wait for the phone to settle down for getting the results and the effects of the new Kernel. I think you can get the healthy results of the new flashed Kernel after some days usage; e.g. for about 2-3 days.

I wish these infos to be useful for everyone..

Enjoy.. ;)
[Galaxy S 4 i9505 Android Development] kevinrubio1:
so far so good! one question : I assume intellimm isn't gaming friendly, correct? if so, do you know the best governor that balances battery and a little gaming (not heavy)?
[Galaxy S 4 i9505 Android Development] lawyer_06:
I think so.. Because IntelliMM uses the frequencies as minimum level as possible, so it couldn't be good for games that need much CPU performance. But i haven't tested it for gaming, so i am not 100 % sure about this point. You can test and share your knowledge with community.. ;)

I am not a gamer so i don't have an idea about the CPU Governor that could balance between battery and performance. You can test every CPU Governor one by one and see the results. And the "Ondemand" CPU Governor could be your first tester i think.. :) Or you can make a research on XDA about this subject.