yashsingh1/xdaforums huggingface dataset:
[Galaxy 3 Android Development] cfrek:
can some one tell me what undervolting means and what advantage does it give to me
[Galaxy 3 Android Development] (•.•):
@dharamg3

G3MODv2 should have some good governon, for battery saving..

This is a huge misconception to load your battery only when its done.. because on the litium-ion batterys there isn't a memory effect like in the old times, but when you let it go down to 0% it can damage the battery the most, because it can lose some of its capacity.

just load it when its under 30% but don't let go under 5% and the battery will have a good life.. ;)
[Galaxy 3 Android Development] hillbeast:
Undervolting means running a part at a lower voltage than what it is rated for. It can reduce power consumption by a little bit as there is not as much current needed to power the device.

Lowering it too far however will cause the phone to become unstable so you have to sit down and test it.
[Galaxy 3 Android Development] cfrek:
Does the.processing speed.remain thesame if I find a suitable combination of undervolting
[Galaxy 3 Android Development] hillbeast:
As long as the CPU frequency is the same, the performance will not decrease.
[Galaxy 3 Android Development] radek.god:
Dharam,

what about kernel development ?

It is normal linux with some samsung specific changes ?

Then You normally compile kernel like at linux side, yeah ?

I am asking because I wanna know why there ase still no FM /bluetooth working on CM6.2 /CM7 and what could happen If your kernel is wrong ?

I mean if FM/bluetooth does not work because of bad kernel implementation or because of 2.3.5 /2.2.1 bad support or incorrect settings etc.

I know at PC I can see "kernel panic", but what about phone ?

Should I brick my phone permanently when ANY of files I am uploading via ODIN is bad or wrongly compiled or not ?

I mean If I will NOT flash SBL and BOOT files , but I will flash my own kernel or flash 2.3.5 with wrong changes, I cant brick my phone, yeah ?I will be still able go to download mode via button press combination and flash succesfully JPS for example ? ...

I know my question should be delivered to Marcell likely, but You have to have a lot of knowledge too if you had to flash so many times at day :D

I dont expect You and Marcel have some HW to be able recovery bricked phone when some flash makes phone REALY unusable or Am I wrong ?...
[Galaxy 3 Android Development] debaj:
A kernel is one thing, a hardware driver is another. FM and bluetooth does not work because of the drivers.

You are right, as long as the bootloader is intact, you can not hardbrick the phone. The bootloader is a program which is independent of the other parts of the phone, like for example the BIOS on your desktop. It starts the kernel itself during boot, so the faulty kernel should not affect it.
[Galaxy 3 Android Development] toppertighe:
If the phones average lifespan is about 3 years or more running standard but its out dated and most of us change our phones on an average of 9 months. What difference does it make if we reduce the lifespan. And isnt this forum about a little risky buisness with our phones. I cant remember how many times i have flashed different roms and kernals. If we were that worried about damaging our phones we would have left them factory fresh

sent from modded samsung gt-i5800 using xda app
[Galaxy 3 Android Development] fuxmen:
Yea it's good talking here xD

On my desktop computer i have for 2years from 2.5 to 4ghz overlocked cpu and i dont give a damn about itd :) it broke I buy new :) Same here, i rather sell out this phone then its gonna broke :)
[Galaxy 3 Android Development] debaj:
What difference does it make if you KNOW about reducing your phone's lifespan? ;-)
[Galaxy 3 Android Development] haree:
hi

very nice info thanks for taking the time for the same

i have never OC beyond 800Mhz and truly feel that if the phone is 667mhz then that is what it is made for so i usually keep it at that or max 10% oc :)

but the sad part is i got my self a new phone and given mine to my wife and she wont let me do anything other than making calls:(

so u might not see me around much guys:( just FYI:)
[Galaxy 3 Android Development] unreal3000:
yeah....are phone ddnt realy cost the earth and most of us will probably only change our phones in about 1-2 years so id say GO OC!

but still i only use it for gaming...
[Galaxy 3 Android Development] radek.god:
I had same opinion like You so I used Fugumod at 1366 MHz as DAILY use + I had phone permanently at charger ...

... Until my battery life was limited to 20-120 mins as max possible usage time, even fully charged.Now I had to buy new one - no Samsung battery brand (50% thiefing price less) , but I do not wanna buy new battery every 3-6 months :(

I have to say I mostly replace my PC HW than buying new phone, so I rather set SETCPU profile rules and disabled live wallpaper as it tooks so many CPU time and decrease battery life and performance.

And I dont think our phone is so ****ty to be replaced :D, yeah Samsung IS SO ****TY :mad: company because of GAY policy (no Gingerbread ... )

I just saw CM7 oficially for HTC DESIRE or WILFIRE, but only few Samsung phones, mostly High end ...
[Galaxy 3 Android Development] hillbeast:
Because some of us live in poor countries with a destroyed economy where stuff is very expensive and we like for our stuff to last as long as possible before letting it just die. My last phone I kept for 5 years before replacing because it was too expensive to upgrade.

That is a desktop computer. Overclocking them is safer as they have a giant cooler strapped to the CPU.

Even if you replace it 1-2 years, the man quoted below managed to break his battery in 8 months by having this opinion. I'm not telling people overclocking is banned or you should never do it, I'm just warning people that it is dangerous. If you wish to go on overclocking then fine, but when it does die, please note that we did warn you. If you aren't worried then fine, get another phone, but don't cry about it here.

Our phone actually has very good hardware in it. Everyone is just convinced its crap because they don't understand the true potential.

As I have only just woken up, I won't go into detail.
[Galaxy 3 Android Development] fuxmen:
If i use stock cooler, and have 65-70C on summer in Stress? :D I don't dissagre with everything U wrote, just have diff aproach to this :) Cheers
[Galaxy 3 Android Development] unreal3000:
u guys ddnt get me.... basicaly im not scared of using oc even at 1.4ghz

BUT i ONLY USE IT FOR GAMES OR WHEN NEEDED....

PERMANENT OC TO 1.4 IS SUICIDE :D

otherwise i just keep it at 700-800mhz
[Galaxy 3 Android Development] hillbeast:
Yes, I have a huge cooler on my CPU. As I mentioned in the OP, I overclock ym main computer no problem. I just like to be a little careful with something with no cooling on it.

Again, not saying overclocking shouldn't be done, it should just be done with this in mind.

I'm not trying to scare people, just inform them of the potential risks from running a 1.4GHz OC on a cellphone.
[Galaxy S II Q&A, Help & Troubleshooting] mali019:
Is anyone else having issues with this phone loosing around 20% to 30 % after a restart. It doesn't happen everytime but sometimes when the phone is turned off and on the battery drops from, for example , 50% to 30%. I had this issue with official roms and unofficial roms.
[Galaxy S II Q&A, Help & Troubleshooting] yeewensmc:
Hi mali019, this happen to me as well, i'm not sure this is cause by the battery itself or the phone itself. My phone will auto restart when the battery usage is @ 4x percent. After itself restarting. The battery will drop to 33 percent every time. I'm swapping a battery with a fren of mine and started testing today. I'm using KG6 roms.
[Galaxy S II Q&A, Help & Troubleshooting] stefan_minkin:
never had that problem...
[Galaxy S II Q&A, Help & Troubleshooting] dandroid13:
Do you guys quit apps or just press the home button? Use the in-built task manager, it's good.
[Galaxy S II Q&A, Help & Troubleshooting] mali019:
I don't use taskmanagers. Only use the one that comes with the phone. This problem happend on every rom i tried. From 2.3.3 to 2.3.4 . I'm gonna buy the new 2000mah and see if it happens again.

Just now i pulled out the battery without turning the phone off and battery percentage dropped from 41% to 22% . Currently I'm using KG6
[Galaxy S II Q&A, Help & Troubleshooting] dandroid13:
Isn't that what I've said? :p

Anyway, you can try installing Watchdog from Market to see if you have apps misbehaving and what is using you cpu.
[Galaxy S II Q&A, Help & Troubleshooting] mali019:
The problem is not an app using the battery. The problem is the phone loosing 20-30 % percent battery after a restart. The phone is not displaying the correct battery percentage.

I even had the battery percentage increasing after a restart without being pluged in to a power point. For example I'll restart the phone for any reason with a battery percentage off 50%. After the restart the battery percentage will show 23%. Sometimes the percentage will increase like its on charge. It will go up to 30%.
[Galaxy S II Q&A, Help & Troubleshooting] anshmiester78900:
Never had this problem better get checked the battery in Samsung service center
[Galaxy S II Q&A, Help & Troubleshooting] dandroid13:
Said that because it happened to me that if the phone gets hot, percentage drops. Later, it returns to a higher percentage.
[Galaxy S II Q&A, Help & Troubleshooting] 11768:
I was experiencing the auto restart and instant battery drain issue while using ninphetamine 2.1.x

After changing to other kernel. No more auto restart nor instant battery drain issue.
[Galaxy S II Q&A, Help & Troubleshooting] tytnguy:
You might need to a battery calibration.
[Galaxy S II Q&A, Help & Troubleshooting] mali019:
I got a new battery ( Perks of working at a phone shop ) hopefully it will fix the issue
[Galaxy S II Q&A, Help & Troubleshooting] Nurra:
I also notice that it takes quit some% after each restart but not 20%. Actually the battery was good when I first got this phone. But after 175 apps installed, battery isn't good anymore.
[Galaxy S II Q&A, Help & Troubleshooting] ScorpioGeek:
Today I left my phone in my room and after an hour I wanted to check my emails before going to bed the screen did not turn on so even after a long press on the power button, so I removed the battery (it was ice cold) after replugging it booted and voila there was a huge drop 50 percent perhaps? So I said to myself, I think I left a resource intensive app running and forgot about it and went to bed without plugging the charger, 3 hours later I wake up thinking it would give me a critical or charge your phone dialog, but instead I have a battery that charges itself :P...

Now in reality that would be cool but i think there is a problem. Using the ninphetamine 2.0.4 kernel for a few days for bln but it was disabled, stock rom.

I have attached two screenshots one taken right after and the other one 3 hours or so after.

I don't think that I would need a recalibration after a few charges the phone is not a week old.
[Galaxy S II Q&A, Help & Troubleshooting] Hellerox:
Hi, I have this exact problem with cognition+ Siyah kernel, how can I fix it??
[Galaxy S II Q&A, Help & Troubleshooting] Hellerox:
So I changed the kernel and everything seems ok now, my problem was with Siyah Kernel.
[Galaxy S II Q&A, Help & Troubleshooting] tryout1:
yeah had this problem with Siyah Kernel too but shouldn't bother me anymore i'm back to CM7 :P
[Galaxy S II Q&A, Help & Troubleshooting] daniel137:
Stock Galaxy S2 instant discharge

I experienced same problem - I was browsing, then phone restarts itself and the battery is instantly on 18% (from 50%).

And then started to recharge itself.

Stock 2.3.4 ROM (version XWKH4), running the same configuration for nearly two months now, with only few restarts (once in 20 days), no new app installed recently.

Maybe some glitch in internal electronic?
[Galaxy S II Q&A, Help & Troubleshooting] likwidsage:
Same problem, just a bit more drastic. My phone seems to freeze, in which I have to manually restart it. And then I see the battery falls sharply. This is on stock Firmware (unrooted) too.
[Motorola Droid Bionic] TauntingBull:
Who here has bought the extended battery but not using it?

Not even once....
[Motorola Droid Bionic] cdf3:
I used it once. Stock battery has been getting me through the day just fine. I'm glad I have it though. It will come in handy for those times when I know I will be out and about, using it heavy, and won't be able to charge it.
[Motorola Droid Bionic] superbalde:
Well, I've charged it but never brought it down past 80%. I just don't like that there's no case other than the shell/holster that fits the extended battery. I really like having a case (especially the TPU ones) so I won't use the extended until I have a case OTHER than the shell/holster.
[Motorola Droid Bionic] Dakota0206:
I was going to get the extended battery but then my first full normal use day went like this.... took off charger at 8:00am. The next time it saw a charger was 1:00am. It had 30% battery.

After having the Thunderbolt I have been amazed with the battery life.
[Motorola Droid Bionic] eakrish:
It is not needed, I've been getting 30+ hrs with light to normal use and about 20 hrs with moderate use.
[Motorola Droid Bionic] dadsterflip:
I love my extended battery. Web/text/downloads last me all day long and a half. Light use maybe two days

At first I charged it all night and it stayed at 30% . Then later on I unplug it plug it then unplug and plug it. Then it started charging.

Anyways im very please with it and I know others are also.
[Motorola Droid Bionic] neckbonest:
i love my extended batt. i got bought a extra regular batt when i got my phone. i went through 3 batts that day and everyday after that. i am a heavy user of my phones. i can at least make it through the day now with the extended batt. i also like the fact that all the accesories fit with the case holster and the extended batt.
[Motorola Droid Bionic] BrianMigs:
I agree 100%. I'm very careful with my phone, but since I have the extended battery and no proper case for it, there's no way I'm gonna be using it while I'm out and about. I'd rather worry about my next charge as opposed to possibly scratching my $589 retail priced phone...
[Galaxy S I9000 Android Development] awesomeandroid:
Question

I guess this is safe too on a deodexed ROM, too freeze those bloatwares u listed?
[Galaxy S I9000 Android Development] awesomeandroid:
Helpful!

oh ok, now I understand, thanks for this thread, very helpful indeed :D.
[Galaxy S I9000 Android Development] SkinBobUk:
Awesome post thanks!

Not only for the tips but for teaching me a lot too!

Sent From My Android Shizzle!
[Galaxy S I9000 Android Development] midikarma:
thx dude!! awesomely useful!! :D
[Galaxy S I9000 Android Development] ajazz:
Great information thanks

Can you please include GPS tweaks as well?
[Galaxy S I9000 Android Development] pikachu01:
Thank you for reading it. :)

It was my hope that it will give knowledge so that people could pass it on to more people :)

Thank you :)

Thank you for reading it :) What kind of GPS tweaks? There are a few notable ones. The most useful ones are disabling AGPS as well as updating the gps.conf. Do you mean that?
[Galaxy S I9000 Android Development] demonstone:
Oh man... Thx for your work... This thread is very useful.

I take my hat off.

Sent from nobody knows where
[Galaxy S I9000 Android Development] ZioGTS:
Wonderful job, pikachu01! A new user will need weeks, maybe months to gather all the bits of info you put here, served on a silver platter! Thank you veeeery much.

Mods, this should be stickied!
[Galaxy S I9000 Android Development] pikachu01:
Thank you :)

Thank you Zio :) I forgot to add a few more posts to reserve. I guess I will add links if I do have any other things to add :P
[Galaxy S I9000 Android Development] haloimplant:
Indeed lots of good info here for people just starting out, and some for people like me who've been around the block once or twice too!

I figured out how to do the CSC change myself, I just put the BMC folder from stock ROM into /system/csc and used one off the CSC selector apps from the market. Is this much different from the instructions here?

Since this has brought up the topic of freezing apps I will ask a question here if I may: Is there a way to keep apps from starting services, without getting rid of them? For example I use Skype and Facebook but I don't want their services running all of the time sucking up memory. Also I notice now that I game I installed recently (E Warriors) is running a service! WTF this is out of control. Any ideas?
[Galaxy S I9000 Android Development] pikachu01:
Yes, the CSC instruction does the same thing. I'm just a bit thorough sometimes :)

You could use System Tuner or Titanium Backup Pro to freeze the app and then unfreeze it when you want to use it. Freezing is actually just doing a PM disable. PM disable basically makes Android think that the app is gone when it's actually still there. Unfreezing an app is basically just 1 click, hence its hassle free.
[Galaxy S I9000 Android Development] alferret:
Agreed +1

Excellent & informative :)
[Galaxy S I9000 Android Development] hackeron:
Awsome post pika.. Great work.. thx
[Galaxy S I9000 Android Development] wonsky21:
Very nice tutorial. Should be pinned :)
[Galaxy S I9000 Android Development] Mr Woolf:
Sticky please (with sgs chlorine).

Great work, much appreciated.
[Galaxy S I9000 Android Development] ajazz:
I have tried lot of Roms and none gave me satisfactory GPS performance except InnOvaTioN v2 by bezke,this Rom gave me almost instantaneous gps lock , when under partial cover it took a minute or so !

Then i moved on to v3 and was back to square one!

unfortunately v2 is no longer available for download.

I have tried Faster Fix, Gps Aids, tried changing setting through sgs tools but no go.

even tried different modems.
[Galaxy S I9000 Android Development] zacharias.maladroit:
well, then open a thread on general, Q&A, etc.

and let someone upload it

hopefully there are still copys of it out there

so there's a way to analyze and understand what was done to get those great results

@pikachu01:

great work on collecting all of this information & putting it in a central place ! :)

*subscribes*

+1 for sticky
[Galaxy S I9000 Android Development] SDeba:
Very nice guide. It'll be very helpful for begginers. +1 for the idea to stick it ;)
[Optimus One, P500, V General] dhruv.always:
I have the LG Stock 2.3.3 and I'm a little bored of the home launcher. Please suggest home replacement applications.
[Optimus One, P500, V General] terratrix:
For performance - launcherpro and zeam

For customization - adw launcher, go launcher and qqlauncher

Sent from my LG-P500
[Optimus One, P500, V General] IamIrene:
go launcher ex
[Optimus One, P500, V General] bluizzo:
Agree with XeactorZ and terratrix go launcher is awesome and that's what I'm using now. And zeam is also great, used to use it on my G1

Sent from my CM7 Nightly HTC Desire HD
[Optimus One, P500, V General] Jrhodes85:
launcher pro,pandahome, go launcher ex,adw,zeam, regina launcher, nemus launcher,windows 7
[Optimus One, P500, V General] rchile:
go for launcher pro mate you will feel the smoothness in ui i am currently using it in stock 2.3.3
[Optimus One, P500, V General] scout1089:
launcher pro :D you can hide your apps and go launcher
[Optimus One, P500, V General] Gremaldin:
I've tried almost every free home replacement, and I liked go launcher ex the best. It has superb features and transitions, very customizable and always gets new features.

I've also tried SPB shell which has superb transitions and is the best home screen if you like to show off your phone, but I feel go launcher has better utility, and while SPB shell offers timescape like widgets, we get tired of them very quickly, and its very overpriced.
[Samsung Epic 4G Touch] iamtimmah:
Is there a way? At least so i can restore my backups . :)
[Samsung Epic 4G Touch] deano0714:
There is a rooted .tar on the acs site :)
[Samsung Epic 4G Touch] comeatmebro:
It's not there atm.
[Samsung Epic 4G Touch] DanCandy:
I haven't seen anything yet.

Though Samsung did release the source code on the launch day so I'd give it another week or so and we should have full root.
[Samsung Epic 4G Touch] sk63:
i bet that we have cwm before the end of sunday
[Samsung Epic 4G Touch] iamtimmah:
Not quite, file didn't work I guess. Patience is a virtue lol
[Galaxy S II General] Igotsanevo4g:
So i was checking out the Sprint GSII today in the sprint store and it had a screen lock password on it so i figured some punk put a password on there. I proceeded to go into the stock recovery to do a data wipe and get rid of the screen lock too check out the phone. I navigated too the wipe function, confirmed it then... IT ASKED ME TO ENTER IN THE PASSWORD WHILE IN RECOVERY! The a keyboard came up and everything IN RECOVERY O_o

This must mean you can run apks while in recovery? Can someone confirm the same thing on other GS2 versions by creating a screen lock password and trying to wipe cache or data on the stock recovery?

Maybe other devices can do this too, but ive NEVER noticed it. Does this make GUI's for recoveries possible with touch enabled to eliminate volume button abuse? If someone can figure out how sammy is doing it, that is. Because as far as i know, running an apk in recovery just flat out isn't possible.

^ Teamwin stole my idea, which I am perfectly okay with ;) :D
[Galaxy S II General] scottishlad80:
If you have an screen lock password set then you need to enter it when using the recovery option.
[Galaxy S II General] dan@msx:
so let me get you right here.... you went in to the sprint store and tried to hack the display model??? only to be asked for a password.... :eek::D
[Galaxy S II General] Igotsanevo4g:
Yes, but this is the first time a phone has ever done that too me. How is a ime.apk running while in recovery?

In so many words, yep. :p
[Galaxy S II General] scottishlad80:
My S2 does it so did my galaxy s. Samsung have designed it that way.
[Galaxy S II General] Igotsanevo4g:
I've only ever had HTC phones til this nexus, HTC phones don't do it :p

Why hasn't a dev ever picked up the idea for a recovery GUI if you can run have touch enabled in recovery?
[Galaxy S II General] drreality:
I tried to put password on my device, the international galaxy s2

., went to the recovery without any verification passwords?

By the I'm using custom kernal
[Galaxy S II General] BrandoHD:
I think it's good if your phone has a password and it was stolen, then the thief can't just wipe the phone, but if you ever forget that shyt, stresssss
[Galaxy S II General] Igotsanevo4g:
You have a custom recovery, I'm assuming so it wouldn't have a lock.

Even if the thief couldn't wipe it from recovery, Odin would anyways. So I think its sorta pointless.
[Galaxy S II General] Intratech:
Even flashing a wipe firmware with repartition will not get rid of the password prompt.
[Galaxy S II General] drreality:
could be, im on ninphetamin latest
[Galaxy S II General] Intratech:
Use the pin unlock screen and set a unlock pin. After try to flash a new firmware or wipe the device from recovery.
[Galaxy S II General] Igotsanevo4g:
Wow. Samsung security ain't no joke
[Galaxy S II General] Intratech:
They did say enterprise class. :)
[Galaxy S II General] drreality:
Ive done so m8, still no luck

I entered a pin ----> recovery---->install zip from sdcard----> a new kernel is installed without any verification :confused::confused::confused:
[Galaxy S II General] Igotsanevo4g:
Dude you're using a custom recovery. It only works with the stock one.
[Galaxy S II General] jzmtl:
Would be nice if the PIN is only needed power on, then it would be a nice security feature. But having to enter it everytime I use the phone is kinda annoying.
[Galaxy S II General] Igotsanevo4g:
Of course, i use pattern lock if anything. Less annoying.

But the main point im trying to make, is that if a keyboard can run, why cant there be touch enabled GUIs for recovery?
[Galaxy S II General] Intratech:
Kernel is not a firmware.:rolleyes:
[Galaxy S II General] Edwrib:
Pattern lock work too?