yashsingh1/xdaforums huggingface dataset:
[G Tablet General] yelrx8:
More details (might work)

As a note to this, I think there is an internal voltage regulator inside the Gtab to bring the 12.0v power from the AC adapter down to ~8.6v to charge the 7.4v battery pack.

With that said, the 5v USB source only needs a step-up circuit to get ~8.6v or enough to charge the battery.

Working the numbers from the other way, the "ipad2-type" USB charge ports can only output ~10-12W, so stepping up to ~8.6V gives (12/8.6) ---> ~1.4A, but at about 85% conversion efficiency, the max charge rate from a "ipad2-type" USB charge port is 1.2A.

If we assume the Gtab battery pack is ~27W, @ 1.2A will take ~2.6hours. I think that is reasonable.

The question for those who have opened up a Gtab, is there a 12v step-down regulator inside? I have a feeling that this step-down circuitry is buried within the main board and will not be easy identify.

This helps me answer the same question for my other thread:

http://xdaforums.com/showthread.php?p=15895169#post15895169

Another thing to think about is that besides the ~27W-h 5v to ~8.6v step-up regulator, a battery charger circuit needs to be incorporated so it will shut off the charge when the battery is full. LM3420 might be a good one to look at.

edit:

Okay, ipad2 uses a 3.8v 6930mah battery pack:

http://forums.appleinsider.com/showthread.php?t=120464

So they just use a step-down (custom) regulator for the main system. The ipad2 does not need to provide for a pesky USB port!
[HTC EVO 3D] mevensen:
I've looked a bit, but haven't found any pictures of the EVO3D laying flat. Obviously, there was an issue with the EVO4G allowing contact with the camera glass when layed flat.

Any idea if this is still an issue with the 3D?
[HTC EVO 3D] xeper:
Probably not the answer you're looking for, but I leave my EVO on its back on all kinds of surfaces. I'm pretty picky about scratching glass/lenses/etc with my hardware, and I've never had a single issue with the EVO getting scuffed, scratched, etc.

I do however notice that others with EVOs put cases on them and lay them on the face, which I think has a lot more potential for damage, case or no case. I think people are just paranoid since it sticks out.

Unless you're laying your Evo's lens on gravel or sandpaper, why really worry?
[HTC EVO 3D] mevensen:
You're probably right, but I can't help but be a bit paranoid about scratching it.

It's funny, because I don't even use a case. I have one of those plastic rings to raise the back a bit.
[HTC EVO 3D] daneurysm:
No way op, no problems ever .... And I haven't been terribly careful

At all. My phone is usually out of the case, always camera side down at work and home on my desks....and at first I was paranoid. About scratches...but after a while a came to the conclusion that HTC probably thought about that for me....

Sent from my PG86100
[Galaxy S II General] matanc1:
Since I got the Samsung Galaxy S 2 it kept rebooting itself every once in a while.

This seemed to happen only after doing something.

For example:

After opening an app.

It even happened once when I got a phone call.

I've reformatted the device the 2nd day I got it (for another reason) and it still happens.

Does this happen to anyone else?

What can I do?
[Galaxy S II General] ryn888:
What is the your device?
[Galaxy S II General] matanc1:
Galaxy S 2.... Thought it was pretty obvious since I posted in the GS2 thread :P

I'll update it though
[Galaxy S II General] MaBlo:
If it still happens after the update I'd return it. Mine have been rock steady since day one, had it for 10 days now.
[Galaxy S II General] JJEgan:
Not always .

But i would install latest firmware first .

Either via official Kies update or unofficial Odin method .

Or return it to seller .

http://xdaforums.com/showthread.php?t=1075278

jje
[Galaxy S II General] maddoguk:
I had random rebooting after moving apps to SD. Dolphin HD seemed to be the main offender.

I moved all the apps back to phone and then, just for good measure, formatted my internal storage & SD card (after backing them up). All seems happy again now.
[Galaxy S II General] BarryH_GEG:
Do this and then a hard reset. If it's still rebooting exchange the phone.
[Galaxy S II General] maddoguk:
No, I didn't need to hard reset but it is worth a try. Mine has now settled down again.

What version of the software are you on? If you still get problems then get it exchanged.
[Galaxy S II General] matanc1:
I'm on the 2.3.3 version Kernel 2.6.35.7.

When I go to Setting> About> Software update it says that there are none.

What do you mean by hard reset?

In the Settings> Privacy there is a Factory Data Reset option. Is that what you mean?
[Galaxy S II General] matanc1:
The build number is

Gingerbread.XWKDC

Also, in the Kies software it says that this version of the device cannot be upgraded. Why is that?

So should I reformatt the device again? How can I back everything up including my contacts and the way I synced them with facebook etc? Can I also back up widgets?

Edit: When I try to use the Backup option in Kies, it keeps showing 0% and doesn't change.

What can I do?
[Galaxy S II General] JJEgan:
Also, in the Kies software it says that this version of the device cannot be upgraded. Why is that?

Because their is no update supplied by the phone supplier to Kies .

XWKDC old firmware .

How can I back everything up including my contacts and the way I synced them with facebook etc?

KIES or and back up contacts to Sim Card or Google mail

Can I also back up widgets?

Yes Titanium pro from the market .

A factory reset and wipe all data.

Or return to seller /service centre .

Or use unofficial method and upgrade firmware yourself but that wont fix hardware fault .

jje
[Galaxy S II General] Flowlance:
Factory reset doesn't wipe the SD card, I believe. Hard reset wipes everything including SD card. Type *2767*3855# on the dial pad to do this
[Galaxy S II General] sgtdag:
Happened to me, same instances; could be micro SDHC compatibility problem. Seems that the Apacer 16GB micro SDHC I was using was causing the reboot. Formatting the micro SDHC on the phone doesn't help. Popped another Transcend 32GB micro SDHC into it and the rebooting just went away, didn't happen no more.
[Galaxy S II General] matanc1:
If XWKDC is old firmware, and Kies won't let me upgrade it, how do I upgrade it?

When you say phone supplier you mean my carrier? Because the SGS2 isn't out yet where I come from. I got it from the UK.

When you say unofficial methods, what does that mean? Does that require rooting?
[Galaxy S II General] stBlueJay:
I'm having a similar problem when i connect to pc with USB, after disconnecting the phone and usb cable the media scanner starts, completes and then phone reboots? :confused:

Anyone else experienced this?
[Galaxy S II General] matanc1:
So just to make it clear:

I've got an old software version and I need to upgrade it and it might solve my rebooting problem?
[Galaxy S II General] relikade:
I have the same problem. At least 10 reboots a day. Have now removed the sd card and it's run 2 days so far without problems
[Galaxy S II General] stBlueJay:
so will removing my sd card sort it out? Do i have to take it out permanently? i've only just got it :(
[Galaxy S II General] sgtdag:
You could try popping in a different brand/capacity card, see if the issue resurfaces. Certain cards/brands are simply incompatible. The big picture here is that you get to enjoy your new phone.
[Galaxy S II General] relikade:
I just formatted in pc popped it back in and its been ok
[HTC Sensation] crazy cat:
Hi all, i got my (developer) Sensation today and want dump the firmware. Any ideas how?

Oh! And it should be WITHOUT my personal data ;)
[HTC Sensation] xtcislove:
Wait for 8 June ;-) There all the People without Vodafone will get a device ;-)

Edit: Wo hast du das eigtl her? :D Ist es ohne Branding? S-Off? Gib mir infos :P
[HTC Sensation] qarclub:
dsixda_Android_Kitchen OK
[HTC Sensation] p0xer:
????????????? S-Off? sadwdsd efrefefeedefdSdasdfsafdsafdassf???

dude, READ THE RULES.
[HTC Sensation] crazy cat:
Got mine from my own sources....

http://www.gizmodo.de/2011/05/30/review-htc-sensation-eine-echte-sensation-fur-die-hosentasche.html
[HTC Sensation] Tamen:
I don't know but am interested - btw what is a developer version of the phone? who gets them and why? What's different about them? sorry for being nooby :P

I know it should be English but calm down, it's hardly difficult to work out what it means (I don't speak any dutch) - just read it out loud. I would guess at:

What have you done to get it? :D Is there any branding? s-off? Give more info! :P
[HTC Sensation] dcwiker05:
More importantly how did you get a developers version and you don't know how to do a system dump...?
[HTC Sensation] crazy cat:
I got it for writing a review. For be clear: i THINK it is a developer device, cause i have the "HTC Function Test Program 1.00g" pre-installed. If it is casual, i´m sorry and a mod shuld just close this thread.
[HTC Sensation] MiKA7:
I have that program aswell, and I have a retail unit..
[HTC Sensation] justadude:
There are plenty of dev units w/ pre-rooted firmware and s-off floating around, many folks with them won't know how to dump the system from it, this isn't a standard day-to-day task for a lot of devs or even non-devs with these units.

If someone provides instructions on this they'd have a decent shot at getting a dump and be able to find someone who may be willing to help poke 'n prod at things to try and help defeat the bootloader w/ an s-off device.
[HTC Sensation] zorbakun:
You can Dump the system using the below guide:

1) Install Android SDK or simply adb

2) Download busybox for Android & copy it to the folder where ADB is located

3) Launch Windows console (cmd) and go to the directory where busybox is with the "cd path/to/the/file" command.

4) "adb devices" <- Is your device detected ? If not, install HTC Sync // Of course, before you have to plug your device in... (Sync mode I guess)

5) "adb push busybox /data/local/busybox

6) "adb shell"

7) "cd /sdcard/"

8) "chmod 755 /data/local/busybox" (something like that)

9) "/data/local/busybox tar cvf dump.tar /system"

10) When it's finished, you will have a normal error like 'tar: error exit delayed from previous errors'.

11) Finally check the root of your SD card, you will find a dump.tar file, Here you go :)
[HTC Sensation] Tamen:
What does busybox actually do and why does it come pre-installed on so many custom roms (at least for the DHD)?

And do you need it? Can't you just do adb pull /system, /data, etc?
[Desire HD Q&A, Help & Troubleshooting] scotia_rfc:
When I set my Date & Time to Automatic from the network provider, it seems to jump ahead by 10 mins every now and again.

If I uncheck the the Automatic option and the recheck it, the time corrects itself but will them jump by 10 mins after a while.

I have only noticed this since upgrading to 2.3.3.

I am on the Orange network and have an unbranded handset.

Has anyone else noticed this issue? I'm not sure if it is network or 2.3.3 related so would appreciate any info from
[Desire HD Q&A, Help & Troubleshooting] RED_:
It will fix itself eventually. I fixed it by having the wifi on for a while. Turning it off, waiting and then turning it back on again. Seems like a local server issue so just wait it out and keep it connected to wifi for a while and see what happens.
[Desire HD Q&A, Help & Troubleshooting] scotia_rfc:
I will give it a try. I usually have my wifi on all the time when i am in the house. I'll monitor it over the next few days and see how it goes.
[Desire HD Q&A, Help & Troubleshooting] tiger zero:
I have had the same problem since the gingerbread update on my Vodafone Desire HD. I have Wi-fi on all day at home and work and only thing that corrects the time is turning the automatic setting off and on again. Definitely a bug in there somewhere.
[Desire HD Q&A, Help & Troubleshooting] scotia_rfc:
That's good to know. Looks like it may not be a network issue then.

Do you have an unbranded handset?
[Desire HD Q&A, Help & Troubleshooting] olivierlee:
Same here in Australia, but only started to happen last night. I can trigger it by going to the weather app and manually updating the weather. Updating again restores the time to normal.
[Desire HD Q&A, Help & Troubleshooting] scotia_rfc:
I have sent a email off to HTC about the issue. Lets see what they say about it.

They seem to be quite active on Facebook these days so I think I'll leave a comment on their page also.

Hopefully will get a reply soon to say it's a bug or that they are investigating it. With past experience in contacting their customer service dept, I'm not holding my breath.
[Desire HD Q&A, Help & Troubleshooting] scotia_rfc:
OK people it looks like it's a known issue and HTC are currently working on it. They sent me the following reply on Facebook :
[Desire HD Q&A, Help & Troubleshooting] ozaghloul:
I haven't had this issue. My phone alarm is what gets me up for work, so that would be a big problem.
[Desire HD Q&A, Help & Troubleshooting] mhbr12742:
I have had the same issue since updating to 2.3.3
[Desire HD Q&A, Help & Troubleshooting] crazeecharlee:
Definitely seems like it is update related to me - I have a couple of phones synced to an Exchange server so I would have noticed before the update if the clocks were out of sync by 10 minutes as the alarms and reminders would have been going off at different times on the two phones, but since I updated yesterday they go off at different times. If you turn off the automatic update, correct the time and re-enable automatic update then it will sometimes roll on an extra 10 minutes within a few minutes. Seems to roll on more rapidly when moving about so perhaps related to cellular location updates?

Phones are HTC Incredible S (unbranded, s710e from Taiwan), Nokia E5 (not my choice - work phone!)
[Desire HD Q&A, Help & Troubleshooting] Rhodius77:
This may be just a little problem waiting for a fix. I only noticed today that it shows me weird time, but it was automatically updated after a few minutes.
[Desire HD Q&A, Help & Troubleshooting] ToneyEricsson:
Same here and I'm on o2-UK. I have also found by having WiFi on it corrects itself but surely there is a proper fix ?
[Desire HD Q&A, Help & Troubleshooting] Andy:
If your rooted I'd recommend ClockSync. It works wonders for me. Keeps my time synced with 0.uk.pool.npt.org . You can use any timeserver local to you using http://www.pool.ntp.org/ . Be sure to turn off Automatic in "Time & Date".
[Desire HD Q&A, Help & Troubleshooting] acflorea:
Same problem here: Vodafone RO, unbranded DHD on stock 2.3. Strange thing though is that I've only noticed it after rooting my phone a couple of days ago. I don't remember having this issue before rooting.
[Desire HD Q&A, Help & Troubleshooting] targett:
I found this today! Thought I was going to be late but turned out I was on time but my time was over 20 min ahead of it's self!!!

Un-checking and then checking the automatic time update sorted it out :D
[Desire HD Q&A, Help & Troubleshooting] jkoljo:
Global NTP servers are out of sync, so HTC cannot fix that. It will get fixed in no time.
[Desire HD Q&A, Help & Troubleshooting] gxapplications:
Same, but worse

I have the same issue, so deactivate the automatic update.

But since I upgraded to 2.3.3, I loose both Wifi and phone networks (3G/edge/simple phone) if the device has not been used for about 2 hours. I must switch off "Data" and "Wifi", and switch on again.

Has anyone the same problem ?
[Desire HD Q&A, Help & Troubleshooting] Diffler:
Hm. Then why does unticking and reticking the automatic sync fix this problem? I mean, it always gets the time right when doing this, doesn't it mean the servers are fine?
[Desire HD Q&A, Help & Troubleshooting] jasopan:
I think i had this problem before i updated.

NOw it asks if i want to automatically update time everytime i reboot
[Desire HD Q&A, Help & Troubleshooting] :
Also having this problem :)

Even stranger, my HTC Clock widget is set an hour behind when set to "Current location". All other clocks are fine.
[Galaxy S II Q&A, Help & Troubleshooting] Mr Brainz:
Heya,

I saw talk of KE2, KE7 and other firmwares and automatically assumed these were rooted firmwares as every time I've checked for an OTA update it says that there isn't one.

Now I'm gathering that the afore mentioned firmwares are official updates that you have to do with Kies (sigh, I'll have to turn on my Windows machine).

I'm not that bothered with Root and CFW as I love the performance of the stock firmware out of the box right now. But I'd be interested in upgrading to newer stock firmware if it is out there.

So my questions are: Are my n00bish assumptions above correct (RE new stock FW updatable via Kies) and why are these not coming over OTA?

Was this the same with the GS1? I came over from a HTC Desire and endless firmware changes for little reason.
[Galaxy S II Q&A, Help & Troubleshooting] JJEgan:
Samsung no OTA in progress its never worked .

jje
[Galaxy S II Q&A, Help & Troubleshooting] CEPi:
Rarely works with their own KIES, let alone over OTA. Odin good for now.
[Galaxy S II Q&A, Help & Troubleshooting] falconeight:
Back in the day when I bought and powered on my captivate it updated ota.
[Galaxy S II Q&A, Help & Troubleshooting] marbulas:
Hi :D

I'm using sgs2 in Korea(SHW-M250S)

In latest firmware (EE20) samsung added FOTA in Settings.

It works really fine.

I think FOTA will be updated soon, too.
[Galaxy S II Q&A, Help & Troubleshooting] brandenk0:
You also have to account that AT&T was sending the OTA's.
[Galaxy S I9000 General] seeraj15:
How would i go about rooting on the official gingerbread?
[Galaxy S I9000 General] merdan:
maybe here?:

http://xdaforums.com/showthread.php?t=1010141

http://xdaforums.com/showthread.php?t=1093155

http://xdaforums.com/showthread.php?t=1011901
[Galaxy S I9000 General] slaphead20:
Flash cf root kernel with odin for root kernel with tweaks +ext 4(lagfix) capabilities

Sent from gt i9000 insanity 8.5/fugumod
[Galaxy S I9000 General] malcho:
Definetly cf root

malcho@juwe4.3.1
[Galaxy S I9000 General] seeraj15:
Can i trust them three merdan? Which would you recommend? If i root, will my phone open apps instantly and have no lag or will i need to do something else?
[Galaxy S I9000 General] Vorbeth:
You need to spend time reading up in this stuff, learn.... all the info is available.
[Galaxy S I9000 General] merdan:
i don't remmember which one's i used, but cf root is the most simple (http://xdaforums.com/showthread.php?t=788108)... about the lag: i thing JVO is quick without any tweaks))) cf root only gives u root permissions, doesn't add any tweaks.

personally, i think stock 2.2.1's are the most stable and gives 3x more battery life with speedmod kernel. Samsung and google are doing soo bad with gingerbread, and that's shocking.
[Galaxy S I9000 General] seeraj15:
The only reason i wanted to root was to cut out the lag, but there is hardly any so i think i wont root after all.
[Galaxy S I9000 General] omad0:
I used fugumod. worked a treat.
[Galaxy S I9000 General] seeraj15:
Ive tried using the cf root for jvo but its not working. In Odin, i go on PDA and get the .tar file. When i put my phone in download mode and connect it to my pc, nothing happens when i click start. However, when i reboot my phone one of the blocks in odin turn yellow. What am i doing wrong?
[Galaxy S I9000 General] aaron.bufc:
Make sure Kies is not running (even in system tray) before you open Odin. I have yet to root JVO also but plan to do so soon. I want my voodoo sound back :)
[Galaxy S I9000 General] seeraj15:
Kies isnt running but its still not working.
[Galaxy S I9000 General] Rycon:
Simply rooting your phone won't change anything about lag (which I have none with JVO stock). It merely allows full system access.
[Galaxy S I9000 General] aaron.bufc:
USB Debugging enabled?
[Galaxy S I9000 General] seeraj15:
ive tried with usb debugging enabled and disabled. Should it be disabled?
[Galaxy S I9000 General] raditz:
Maybe you need to reinstall the USB drivers...
[Galaxy S I9000 General] seeraj15:
Ive reinstalled kies a couple of times and the drivers are on that arent they?
[Galaxy S I9000 General] ertangun:
I think, Try it different PC.

It is Odin connection issue
[Galaxy S I9000 General] seeraj15:
Ive tried 2 computers and still not working
[Android Apps and Games] AMarsden:
Hi I currently reside in the USA and spotify (because of the darned record companies) has not made its way over here yet. I heard that if someone invites your or someone based in the UK or other countries where its supported signs you up you can use the service. So being that the community here on XDA is full of surprisingly generous people I thought I would give it a whack and ask to see if anyone could help me :) I am willing to donate via paypal if someone truly can help! THANK YOU FOR ALL REPLIES

I tried all sorts of proxy methods already and it seems as though they blocked this method....
[Android Apps and Games] LordManhattan:
Can you download the application from the states? I can make you an account.
[Android Apps and Games] AMarsden:
yes I already got it installed...maybe PM me and I can give you the information needed? this would be awesome of you....
[Android Apps and Games] JamesC_:
You need to have a Premium account to be able to stream to your phone, that costs £10 a month.
[Android Apps and Games] AMarsden:
well thats fine I would like to get a free trial though to start then go from there
[Android Apps and Games] LordManhattan:
I'm on it :) I'll just fill out some random name and stuff. You can change it yourself later.
[Android Apps and Games] LordManhattan:
Btw, i need your email. PM it to me :)
[Android Apps and Games] johan12330:
I am sorry, but it won't work. Maybe it'll work at first, but the free account only allows you to listen outside the allowed countries within 14 days, after that you won't be able to listen any more. And to pay for the service you need to be in an allowed country, otherwise you won't be able to pay
[Android Apps and Games] LordManhattan:
Yeah, you'll just have two weeks, but that's two weeks of sweet listening :p
[Hero CDMA General] alexdemonumber3:
This is a tutorial for people who have trouble rooting with z4root and get a half rooted phone after clicking 'permanent root' in the first place.

1. Download z4root from 4shared. (Latest version is 1.3 I believe?)

2. install the z4root apk.

3. Open z4root, make sure usb debugging is on. (Settings>applications>development>usb debugging)

4. Click the temporary root button.

5. Once the temporary root completes, click the permanent root button.

6. When the permanent root completes and says 'rebooting..', pull your battery and boot up the phone.

That's it. You're now rooted. Install clockworkmod recovery through Rom Manager from the market or download the recovery.img and zip it in a HERCIMG.zip and install it via hboot (which is my personal preference)
[Hero CDMA General] c00ller:
The first time I used z4root I was really frustrated when it got stuck on the "rebooting" and it seemed to take several tries. The key is to open your app drawer after rooting. If you see Superuser, you're good.

Also, just want to point out that the HERCIMG.zip installing only works if you're S-OFF. In any case, if you're S-OFF you don't even have to go through the root process, anyway :D
[Hero CDMA General] Chamelio_Sal:
i downloaded it and but it refuse to let me install the apk ... a lil help please
[Hero CDMA General] NineInchNails:
Allow third party apps

®patience is a virtue©
[Hero CDMA General] NineInchNails:
Also to add... quit recommending flashing through rom manager. Its horrible and too many things go wrong. ALWAYS flash in recovery and bootloader. Will solve a ton of flash problems.

®patience is a virtue©
[Hero CDMA General] mikeinstlouis:
Will this method work for all HTC Hero radios?

Does anyone know if this will work on an HTC Sprint Hero with a radio of 2.42.02.10.29 Mar/2010,16:02:39

I have read that people have had issues. I was also told that I would need to update my phone to FROYO. Is that true?

All I want to do is move stuff to my SD card to free up space.

Also, if I need to, can I unroot? Thanks!!

Mike