yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] technetium99m:
...

The gmail app uses push email which is 'always-on' but doesn't actually sync unless you receive an email. Therefore, battery usage is more dependent on how often you receive email rather than the fact that is is 'always on'

See: h t t p://w w w.pushemail.co.uk/

for an overview of how push email works.
[Galaxy S II General] iwang:
My phone runs cooler without push mail, no master what the theory is. Sync every hour.
[Galaxy S II General] komarto:
this is a massive battery drain what kernel are you using?
[Galaxy S II General] DummyPLUG:
take a look at how Push mail work first. Anyway, believe what you want to believe.
[Galaxy S II General] iwang:
That is with screen on..I am pushing to get 4-5 hours screen on time with wifi and 3g on.

I am on speedmod t28, still conditioning battery.
[Galaxy S II General] komarto:
I am about to install T28 too, Ill check and report :D
[Nook Color Q&A, Help & Troubleshooting] doncaruana:
Was just looking at the b&n update(s) and trying to understand what it is that it does that removes root access? Is it simply the act of resetting the permissions on the superuser program (su.apk)? Or does it have anything to do with u-boot.bin/uImage/uRecImg/uRamdisk/uRecRam? Or both?

Does the same problem occur with regard to the google apps where the permissions get reset on those as well?
[Android] KnowledgeBroker:
I've seen threads about the prime where the question is "what do we know for SURE" and an obvious answer is nothing really. What about ics? Google searching really doesn't help since it is over posted with no concrete answers I can find.

So what are the main differences besides it being made tobwork on tablets or phones? I have a few answers that sound believable, but I would like to see some sources, not just rumors.

Oh, and trolls aren't needed, this should be a semi-serious topic, not just another wasted spot on the internet..
[Android] The Root:
One thing we've learned is it eliminates capacitive buttons. That's why the Prime's screen is so large. I think it does bridge the gap between tabs and phones. Downside is it may make it bad for updating current phones.

Sent from the American Dream.
[Android] BelowTheHeavens:
:D
[Android] BelowTheHeavens:
Blue Themed

Camera has built in panorama mode

Will launch with Google Shopper and NFC Enabled devices will be able to utilize those features

Gmail is all rethemed

Will be available for the Nexus S Nexus Prime gets it first (expected) then other devices will follow after

Not too many changes, just UI things, don't think requirements are set too high for year old devices to run it

The little icon in the bottom right, looks like a tray with multiple apps in it

Google search bar embedded on very top like Honeycomb Apps/Widgets launcher a lot like Honeycomb

This release is still very early, notice the theming of the power tray

Source: Rootzwiki
[Android] The Root:
Looks a lot like	Touchwiz. Can you confirm if it's involved?

Sent from the American Dream.
[Android] jonas2295:
Aren't there hardware keys?

Ice cream won't need hardware keys?!

Confusing :)

I think if the design is as good as my hd2 I will buy it and the display will be real hd! 720p.

1.5ghz dualcore processor.

Yes thats what I know for sure.
[Android] tt0204:
The phone in the pics are nexus s with test version.

And what you know for sure is nexus prime not ICS lol.

What I know: It will be and is intented to work on different device, from hero to gs2, and different screen sizes with an adaptive UI (not sure about this).

One more: it will be awsome!
[Android] jonas2295:
http://pocketnow.com/android/samsungs-legal-team-confirms-nexus-prime

Some sources :D

But it´s nearly sure that it will have ICS ;D
[Android] primetechv2:
I've heard the platform called "a marriage between TI and Android," and "a marriage of Gingerbread and Honeycomb." Also, "Honeycomb for phones."

Ice Cream Sandwich is a somewhat faraway version of Android that will look much more like the sexy Honeycomb we phone users have seen from afar (imagine that Android Marketplace look brought to other stock apps), and it might just have the Honeycomb bottom bar too. (Although personally, I'd rather it NOT be there if/when the phone was switched to landscape mode)...
[HTC EVO 3D] Motogeek:
Phone is rooted with s-off, Can we flash the clockwork recovery through rom manager? or is that for CDMA EVO 3d. I currently have the revolutionary modded CWM installed.
[HTC EVO 3D] Moonbloom:
No, you can't flash CWMR from within ROMManager if you flashed Revolutionary version of CWMR on the GSM version of HTC EVO 3D.

It will not function properly and can cause boot loops and so forth.
[HTC EVO 3D] FaithCry:
if you used revolutionary it should've flashe a custom recovery for you.

and just as a heads up, questions go in q&a or in the recovery thread, posting in development may result in getting banned. :p
[HTC EVO 3D] Flashmaniac:
Simply s-off via revolutionary tool and go here

It's really easy.
[Windows Phone 7 Q&A, Help & Troubleshooting] fahdriyami:
Okay, so ive looked around, havent found much on the matter so i wanted to ask if it is possible to mirror a Windows Phones display on an external display via the MicroUSB port? Similar to the way Microsoft does it in demos/presentations...

There have been reports of this being implemented by Microsoft late last year but i havent seen or heard anything yet...

Anyone have any info?
[Windows Phone 7 Q&A, Help & Troubleshooting] Dinchy87:
yeah that's sound good. I wish windows phone would evaluate more and with Nokia on board they could make something like on the Nokia E7 the USB port using. i dont know how the name for that is but they can use usb sticks from Nokia to transfer thing to PC without a phone later. something similar could WP do, with all data on the phone, like a backup stick. where all the save backups are. just in case of error or something to have it handy. and they could manufacture it and i would buy it. it helps a lot. like your tread about TV out. that are small things that help a lot.

But they are still young Mobile OS and there is more room to improve :)
[Windows Phone 7 Q&A, Help & Troubleshooting] backlashsid:
hope Tango brings this support !!

man...cant wait for Tango or Apollo !! hope they bring more cool and new features just as Mango did !!
[Windows Phone 7 Q&A, Help & Troubleshooting] NucleusMS:
MHL (Mobile High-definition Link) sounds promising. What about MicroUSB to RCA? Won't that work?
[Xperia Play Q&A, Help & Troubleshooting] IE-coRe:
I hope you all now the game becouse its epic. My problem is that it is not as smooth as it should be. In build phase it is perfect, high framrate, no lag....

But in combat phase when more than 10 enemys are on the screen than its getting laggy. It is playable but i just dont like it. How to solve it?

I have a 16GB Class 2 SD card. Would a qicker one solve this problem?
[Xperia Play Q&A, Help & Troubleshooting] Deoxlar:
The overall performance of my favorite class 4 sd card has been smoother then the class 2 but I'm not sure it will help the lag. How lggy is it? Is it unbearable because when I played it, it only lagged slightly..
[Xperia Play Q&A, Help & Troubleshooting] wired84:
I found this for a while too, I found the reason was the battery was overheating and even caused the game and sometimes my phone to crash! I solved it by getting a new (bigger) battery and by rooting and removing bloat - contacted the devs but they won't update the game till its fully released!
[Xperia Play Q&A, Help & Troubleshooting] brochador:
Guys, what's the file size of data file? I only have 700mb left on my sd card, and I'm planning to spare atleast 300mb on it..

Are there many players always online?
[Xperia Play Q&A, Help & Troubleshooting] hairdewx:
I've always had some slowdown while playing. They released one update that improved the slowdown a little bit, but it's still noticeable during game play.
[Galaxy S II Q&A, Help & Troubleshooting] mellll:
I had my S2 set to 1.6GHZ and noticed very little battery drop compared to 1.2ghz (stock) so now I am just wondering if it would help me save battery if I set it to 800mhz?

Anyone know if this will help?

And for some reason SETcpu only detects the S2 as 1 core. So hopefully thats just an error and I hope I really have a dual core phone.
[Galaxy S II Q&A, Help & Troubleshooting] bnbasarir:
Which kernel are you using?
[Galaxy S II Q&A, Help & Troubleshooting] mellll:
I am on Light'ning 6.1 (2.6.35.11 ninphetamine-2.0.5+)

XXKH3
[Galaxy S II Q&A, Help & Troubleshooting] darylimjz:
Changing CPU speeds will not help you save battery. Undervoltaging (UV) will, however. UV only works on certain kernels, and you MUST know what you're doing before attempting to overclock and undervoltage simultaneously. Read up OC/UV guides around the forum to know more and the recommended speed/voltage pairings.
[Galaxy S II Q&A, Help & Troubleshooting] mellll:
I'll be staying far away from that then. Thanks!
[Galaxy S II Q&A, Help & Troubleshooting] supermult:
of course underclocking will give you a bit more battery life. even if you don't undervolt.

underclocking it to 800 simply forbids the processor to go up to 1 or 1.2ghz and it doesn't need as much power as in the higher states.

a normal desktop cpu also gets hotter if its overclocked with its stock voltage. But if you crank up the voltage too, to keep it stable it will get even hotter.
[Galaxy S II Q&A, Help & Troubleshooting] raf2k:
Well, Nordic hardware has done some tests. Undervolting CPU and GPU will not save your batterylife significantly.

http://www.nordichardware.se/test-l...kt-pa-laengre-batteritid.html?start=3#content

The article is in Swedish, but all graphs are in English.
[Galaxy S II Q&A, Help & Troubleshooting] Cane Phoenix:
Actually it shouldn't. A faster speed allows the CPU to finish the task faster and then go to sleep...
[Galaxy S II Q&A, Help & Troubleshooting] NoOneCanHelpMe:
Yes, exactly!
[Galaxy S II Q&A, Help & Troubleshooting] Ace42:
That may be true, but higher frequencies have a higher power draw, the phone at lower speeds should be able to manage with whatever the task is, assuming it's not a extensive app. If you're not a power user you don't need the phone to be clocked at the max freq, you can lower it and you see minor changes in battery life. With dual cores task are handled must better so 1.2ghz+ shouldn't really be needed, TouchWiz can't be as bad as Sense, where you actually need it to be clocked higher.
[Galaxy S II Q&A, Help & Troubleshooting] ithehappy:
Oh man, Undervolting is OK but why would you Underclock a CPU? Now don't tell me it's too fast, don't need that speed in real world, you won't notice any difference and etc..If you are gonna Underclock it why did you purchase it on the first place?

Besides, that article said it all.

Regards.
[Galaxy S II Q&A, Help & Troubleshooting] MrPhilo:
For me I think underclocking + undervolting does indeed save battery life.

What I mean is that in my sig '1.6Ghz - 1325 mV' an at '800Mhz -950 mV' you see a difference of 375mV which I think can save your battery life for a couple of good minutes + 800Mhz is enough for my needs along with playing games (Only a tad slower at loading).
[Galaxy S II Q&A, Help & Troubleshooting] Sparksltd:
That's not necessary true. Yes at a higher frequency the task would complete faster but at the same time the processor with use more current and or increased voltage at the same time. That's why cpu's level up and down. Otherwise why not have the CPU set at 200Mhz-1200Mhz instead of 200-400-800-1000-1200Mhz.
[Galaxy S II Q&A, Help & Troubleshooting] seshmaru:
Please set your computer on fire and never return to the internet ever again so it doesn't have to be filled with your stupid statements.

Also yes underclocking saves battery, anyone who says it doesn't is dumb, you wanna see for yourself? set your phone to 1.6 GHz all the time, according to you people this wouldn't significantly drain the battery any more right?

Undervolting saves slightly more battery than underclocking.

Also why would you underclock + undervolt the phone? Because it saves battery and you won't find any noticeable performance gains between 800 MHz and 1.6 GHz.
[Galaxy S II Q&A, Help & Troubleshooting] Jigsy75:
underclock + undervolt = winning !
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
My phone is running at 751mv at 200mhz on tick-over and is ok. Lots of battery life!
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
Changing cpu speed upwards will use more battery life.
[Galaxy S II Q&A, Help & Troubleshooting] xdafun4all:
http://xdaforums.com/showthread.php?t=1239176

this is another topic discussing its effect on heat generation

so whats ur opinion ???
[Galaxy S II Q&A, Help & Troubleshooting] jody2k:
Damn right underclocking is saving battery, just doubled battery life with setcpu @ 500 max settings :) try it you will see
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
SetCPU to 500

:D
[Galaxy S II Q&A, Help & Troubleshooting] BrandoHD:
Can you point me to the empirical data you have to prove this theory, if I am to under-volt my CPU, I would like to have some concise evidence on the gains that should be achieved, as I am unwilling to under-volt based on gains that have been had, or not, by the members that are discussing the topic, as we all know the effects of under-volting that one may experience can be the result of the placebo effect.
[Galaxy S II Q&A, Help & Troubleshooting] ithehappy:
I really LOL to those comments which says, you won't find any noticeable difference between 800 MHz and 1600 MHz! That's absolute non sense.

There may be no apps or games which needs 1.6 GHz but that doesn't mean that there is NO difference. I crazily see a lot of users Underclock their CPU's to 800 MHz or something, but I really don't get the idea that why did they buy it on the first place?

Anyway, I will not even Undervolt the CPU, let alone Underclock, to have more juice, never.

Regards.
[Galaxy S II Q&A, Help & Troubleshooting] bnbasarir:
This "faster processing means less power" argument has ni ground. Its against the nature of physics!!

Example; according to this theory a Ferrari should consume less gas than a Toyota since it has a high capacity engine, it goes faster... or that if I drive a car on 7000rpm constantly it will use less gas since I'm using more power to get where I've to.

I guess you guys get the drill. Underclocking and undervolting helps a lot to save battery life on smartphones but can't be considered alone. There are many other op. environmental factors. Staring from your is and kernel going up to even temperature outside. I know you guys are probably smiling but if you dig a little bit you will see that batteries are effected by temperature and so other components.

My advice is try different rims and different kernels to find the most suitable one for your needs.
[Galaxy S II Q&A, Help & Troubleshooting] ChongoDroid:
You really need to read this article about the race to finish theory. Simply put, uc is pointless with CPU scaling as good as it is. Now obviously if we set our CPU to performance and had one at 800mhz and one at 1000mhz, the one running at 1GHz would chew more juice.

Now imagine a foot race of a 1000m and you have two athletes, now is it better for him to sprint to the finish and then as soon as he finishes he instantly gets to rest and drink water, etc. The other athlete has to jog, while not as fast he uses less energy but he also gets less rest time.

Now what were comparing is whether athlete A is more rested from having more rest time or whether athlete B has saved more energy from running with less exertion. Neither one is going to be leaps and bounds better then the next but according to that article (that I can't seem to find) underclocking does not save battery as it takes longer for the processor to complete the task.

Now I'm not 100% but at least I don't flame ppl when I could be wrong...
[Galaxy S II Q&A, Help & Troubleshooting] bnbasarir:
Probably underclocking while processing actively doesn't help but if you are using a rule like "while screen off" it saves you juice.

I'm not talking from articles but from personal experiences and I know that the response is not intended for me... I'm writing for the sake of discussion :)
[Galaxy S II Q&A, Help & Troubleshooting] devilkin:
I'm not basing this on any proven material but just my own logic. I think a big factor that you have to take into consideration is HOW the phone is used.

If you run a lot of apps that constantly require your CPU to run at the Max like some games then because of the fact that your CPU can't scale down to "finish the task quickly" because the time it takes to finish is up to user/gamer, then it's a definite case of under clocked should give better battery.

But for every day use with intelligent CPU scaling I doubt it's as clear cut as that and maybe for some people depending on their use they get better results with higher speeds.

Personally for me, if I wanted a 800MHz phone, I would have bought one. I bought the phone to be a smart phone and I run it with all its bells and whistles (and keep an emergency charger in the car :p )
[Galaxy S II Q&A, Help & Troubleshooting] ChongoDroid:
Yes absolutely, I also find that the higher frequencies (1400mhz, 1600mhz.) Have a much higher drain, personally I run mine at 2 settings

At home:

1200mhz screen on

1000mhz screen off

_

And out and about settings:

1000mhz screen on

800mhz screen off.

Works great for me, very fast, great battery (18 hours, 3-4 hours screen on time)
[Galaxy S II Q&A, Help & Troubleshooting] ChongoDroid:
+1 there is always a time and place for uc, I also love flying fast personally. I just had to correct that troll.
[Galaxy S II Q&A, Help & Troubleshooting] MrPhilo:
Underclocking will save battery. First of most games don't require 1.6Ghz to run smooth or 1.2Ghz although the CPU is at a solid 1.2/1.6Ghz while playing whatever game. If you underclock it to either 800Mhz or 1Ghz, you'll see a battery improvement in the long run as well as the game still being smooth as butter + along with undervolting like me, you'll achieve more battery.

Same principal for Browsing, Ebay, emailing, your CPU is bound to go pass 1Ghz at certain time which uses more power. So underclocking does indeed save battery but loses a little speed.

This is my theory or a somewhat fact (as it worked for me)

Thanks
[Galaxy S II Q&A, Help & Troubleshooting] inkyadrian:
Cost comes into this. They use the cheapest materials. If it heats up, it is not efficient, unless the components have to heat up to be efficient. So the most narrow wiring will be used which results in throttling/resistance and causes heat, which is a waste.

Can I put Mac 10.7.1 Lion , on my Galaxy?
[Galaxy S II Q&A, Help & Troubleshooting] veyka:
My cpu spy stats for the past 2hours ish

1200MHz 48s

1000MHz 21s

800MHz 5min 22s

500MHZ 1min 45s

200MHZ 1h 48min 17s

Deep Sleep 56Min 48s

So er, the Samsung power management and scaling does a good job of keeping the CPU in as low a freq as possible, this is with the default ondemand scaling.

Undervolting is good for battery life, we know this, but also samsung does some jiggery and automatically UV's some cpus, by 25mV+ (some have 1300mV @ 1200, others 1275mV etc)
[Galaxy S II Q&A, Help & Troubleshooting] AndreiLux:
What the ****? ....
[Galaxy S II Q&A, Help & Troubleshooting] ChongoDroid:
No reason to get agitated, I'm not speaking as an expert so no reason to get mad. I wish I had that article but I can't seem to find it. You clearly know more about transistors and the actual science behind this so I'm not discrediting you or disagreeing I'm simply repeating what I read.

All I'm saying is if one task takes say 2 seconds to process @ 1GHz and it takes 2.5 seconds @ 800mhz is it more efficient to run @ 1 GHz and have the extra .5 seconds to let the processor rest at 200mhz or whatever the resting CPU speed is.

My math is all hypothetical and really I'm just curious now.
[Galaxy S II Q&A, Help & Troubleshooting] nicregi:
For my experience, undervolting will reduce your battery usage while overclocking will not.

Just my 2 cents though :)
[Galaxy S II Q&A, Help & Troubleshooting] ChongoDroid:
When I had the atrix, UV was very unstable so I'm eager to see what this beast can run off.
[Galaxy S II Q&A, Help & Troubleshooting] AndreiLux:
Did you even read what I wrote? I spent half a page explaining from A to Z why thats wrong, and youre still coming with that nonsense theory...
[Galaxy S II Q&A, Help & Troubleshooting] drreality:
This is the most scientific explanation we got in here.

Thank u mate
[Galaxy S II Q&A, Help & Troubleshooting] ChongoDroid:
To be honest I didn't... Now that I'm at home I did read it and there are some things I don't understand, and some I do. Thanks for explaining that.
[Galaxy S II Q&A, Help & Troubleshooting] Sparksltd:
This thread makes me laugh.

Ok for the people that still can't understand that underclocking saves battery life.

Think about a toy radio control car (or a real car if you like). Imagine the car driving to a destination that's 2 miles away. If the car was to drive slowly it would consume x amount of fuel/power. If the car was to drive very fast it would consume much more. In fact your toy car might not make it.

:'(

This is common knowledge.

Anyway I'm not saying that your phone is the same. Since cars have wind resistance etc and electronic devices don't but have other affecting factors. But maybe this might help
[Galaxy S II Q&A, Help & Troubleshooting] ChongoDroid:
I understand that and I underclock/undervolt myself I was trying to remember an article from memory since I can't find it for the life of me and in the meantime I've been enlightened but thanks anyway for the analogy... It was better then mine lol.

Edit: I reread my post and I didn't mean to come off like I believed this theory. I should have been more clear that I was really asking and not stating.

Now we know, and knowing is half the battle :)
[Galaxy S II Q&A, Help & Troubleshooting] jimyeah:
Word
[Galaxy S II Q&A, Help & Troubleshooting] hermaniii:
I'm undervolting and underclocking and I notice a small difference in battery life and the telephone feals cooler.

I'm using 1000mhz because i think it was designed for that speed but was bumped up because of competition.
[Galaxy S II Q&A, Help & Troubleshooting] m4rshall:
i've found that underclocking doesn't really save me that much battery use. i leave mine set at 200/1200 except for screen off which is 200/500. with sync off i lose about 2% every 5-6 hours if the phone is doing nothing.

i'm currently testing it on hardcores kernel. ninphetamine does allow undervolting which will save you more.
[Galaxy S II Q&A, Help & Troubleshooting] Teio:
I was going to explain this but I couldn't have done better than you did.

Perfect Explanation, very throughly...

RESPECT
[Galaxy S II Q&A, Help & Troubleshooting] prinzhernan:
Thanks for this! Just got the SII two weeks ago, finally got a jig, flashed and was looking for info on undervolting.
[Galaxy S II Q&A, Help & Troubleshooting] ithehappy:
Huh, after testing with UV setting for about 36 hours the Real World effect is worse than a non UV kernel. Absolute non sense wasting time behind this UV config, in practical usage battery life has gotten shorter than a non UV kernel. Useless.

So forget about Underclocking or Undervolting, they basically DOES NOTHING to save juice from the battery. Whatever technical stats one may provide, I've known the truth.

Regards.