Develop Bugs

Bunch of questions, terrible newbie

Okay. Here to learn as much as I can, if you can number your responses with the questions and add whatever you believe is best. Thanks. ^^
Bootloader:
1. Do you unlock a bootloader JUST so you can load custom roms?
2. Is the method of unlocking the bootloader on SE's website the best way?
3. Do I need to have the SIM unlocked before unlocking the bootloader?
4. What is the point of custom roms?
Rooting:
5. Can I remove the apps here; http://forum.xda-developers.com/showthread.php?t=1046699 just by having root access? No special tools needed?
6. Are there other good methods of optimizing things like battery life specific to the xperia play?
Sim Unlocking:
7. Is there any method of doing this without a cost?

I'm on an R800x, which doesn't have sim card anything, so I'll just answer the questions I know.
1. Unlocking the bootloader allows you to install 3rd party software that overwrites the stuff that is part of the boot process. This pretty much refers to the kernel, for the Play. Certain roms, such as MIUI and CM7 require you to use a kernel different from stock, and since you need a different kernel, you must have an unlocked bootloader. As far as I know, that's the only real benefit for an unlocked bootloader, from a user standpoint.
4. There are many things that custom roms offer, as opposed to the stock your phone came with. This can range from a new UI, new apps, tweaks to system files, etc. Generally speaking, developers strive to make their custom roms operate better than stock. For more information on this point, I would suggest you check out some of the custom rom threads, just to see what they've changed from the stock rom.
5. You will need root, but you will need something with which to remove the apps. The best app to use, in my opinion, is Titanium Backup. Not only will it allow you to remove system apps, but it will also back up those and user apps, all for free. Unless you buy the pro key, that is.
6. As far as specific tips for the Play, I would recommend rooting so that you can disable the auto brightness. While auto brightness is desirable in most phones, the Xperia Play (And other Xperia devices, I think) are almost constantly shifting the brightness, to where a slight tilt of the hand can make the screen dim or brighten. I'm sure that can't be good on the battery. Generally speaking, though, apps such as Juice Defender and Battery Defender have profiles or just general settings to adjust data flow and many other options that can significantly increase battery life.

To the best of my knowledge
2. Is the method of unlocking the bootloader on SE's website the best way?
Click to expand...
Click to collapse
Yes, IMO.
3. Do I need to have the SIM unlocked before unlocking the bootloader?
Click to expand...
Click to collapse
No, but you can check if you can unlock following the instruction on SE's site:
1. First, you should confirm that it is possible to unlock the boot loader of your phone by checking the service menu. In your phone, open the dialler and enter *#*#7378423#*#* to access the service menu.
2. In your phone, tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.
Note that unlocking void your warranty.
7. Is there any method of doing this without a cost?
Click to expand...
Click to collapse
Not that I know of.

Awesome guys, Thanks a bunch.

Unless you're really tight on space (which shouldn't normally happen if you've done the adb setinstalllocation trick and moving apps to sdcard), i would suggest freezing the apps instead of removing them especially if you're sticking with stock. This would make it a lot easier to move to the next official OS upgrade instead of a mad scramble to find the stock apps and reinstall them. The pro version of Titanium backup and SystemCleanup has the freeze function. I've freezed a lot of crap on my phone and it makes a world of difference wrt. boot time and general performance.

Unlock boot loader is very good allows you to flash custom kernel and overclock

@JulianPaul/Vabene2002: Not sure if im sticking with stock, My model is R800AT. So not sure of my options yet. Im still trying to absorb as much as I can.
Wonder if I asked some more questions if they'd be answered.
8. Is there any recovery utility WITHOUT unlocking the bootloader? Say I mess something up with my root, Can I recover back to an original ROM?
9. Can I back up my current running ROM as soon as I get my phone so that I may return it to that state?
10. If you need to change your kernel to match a modified ROM; Your current ROM wont support it, so you need to change kernel AND ROM at the same time? Otherwise your phone wont boot?
11. Any decent links for rooting an r800at?
12. Is gingerbread the latest version of android an xperia play can run and have jailbroken?

Would having root access void the warranty? I want to remove some pre installed apps so is there a way to do this without voiding the warranty?
Thanks
Sent from my R800i using XDA App

Yes, it will.
But if you just recover to a stock ROM, then its like you never rooted.
Thus, warranty reinstated.

Nah, don't want to risk it yet. May never root this phone actually...
Sent from my R800i using XDA App

Im going to root mine as soon as it arrives. Lol.
Not to diminish your opinion, If you dont know exactly what you're doing, it could get ugly.

I rooted my old ZTE blade but this phone is just... different. I mean it's probably gonna Get ICS anyways and if I were to root I'd probably need a very simple guide.
Sent from my R800i using XDA App

SuperOneClick is about as simple as one could imagine.
Sent from my R800x using xda premium

Trygon said:
SuperOneClick is about as simple as one could imagine.
Sent from my R800x using xda premium
Click to expand...
Click to collapse
Do you know the latest version of android this works on? Looks like 2.2.2 to me.

SirRudolph said:
Do you know the latest version of android this works on? Looks like 2.2.2 to me.
Click to expand...
Click to collapse
like 4.0 it uses different exploits for different versions. gibgerbreak and zergrush are 2 of them
Fma965 - Forgottencoders.co.uk
Want to make me a banner? PM me

8. Is there any recovery utility WITHOUT unlocking the bootloader? Say I mess something up with my root, Can I recover back to an original ROM?
Click to expand...
Click to collapse
Yes, you can install Clockworkmod recovery from the market, there is an auto installer for xperia. That can be done without unlocking the bootloader but you must be rooted.
9. Can I back up my current running ROM as soon as I get my phone so that I may return it to that state?
Click to expand...
Click to collapse
I believe a nandroid backup on CWM would do the trick, but I am not sure. I simply made backups of everything I uninstalled so I could revert it.
10. If you need to change your kernel to match a modified ROM; Your current ROM wont support it, so you need to change kernel AND ROM at the same time? Otherwise your phone wont boot?
Click to expand...
Click to collapse
Yes. kernel flashing on locked bootloaders brick your phone. and AFAIK, no custom rom except those based on stock have touchpad support.
11. Any decent links for rooting an r800at?
Click to expand...
Click to collapse
I have an r800a, not sure about the differences regarding r800at, check this thread:
http://forum.xda-developers.com/showthread.php?t=1294129
12. Is gingerbread the latest version of android an xperia play can run and have jailbroken?
Click to expand...
Click to collapse
If you keep it stock, yes, 2.3.4. There is FreeXperia rom that is 2.3.7 as well.
On the forum you will find links to ICS based roms, SE leaked and AOSP. Both are WIP, I believe.
I've read somewhere that Sony will release ICS for the xperia 2011 line around April.

pretty sure flashing kernels on locked bootloaders doesn't BRICK your phone. It won't allow the kernel to be flashed as you can't use Fastboot only flashmode (official signed Roms only )
Fma965 - Forgottencoders.co.uk

fma965 said:
pretty sure flashing kernels on locked bootloaders doesn't BRICK your phone. It won't allow the kernel to be flashed as you can't use Fastboot only flashmode (official signed Roms only )
Fma965 - Forgottencoders.co.uk
Click to expand...
Click to collapse
Doesn't brick as in "turns your phone into a very expensive paper weight", but your phone will not boot anymore and you will have to flash a stock rom with flashtool to recover.

Best way to Install CM 9 on locked bootlaoder

So I have a carrier branded (rogers) Xperia play build 4.0.2.A.0.42, it is "unlock able" through sony, what is the best way? paid unpaid? test point the only way?

EDIT: Wrong info. Sorry about that.

Test point is the only way for a Rogers one.
It's only available paid. You can have someone like Alejandrissimo help you remotely for $24, or buy an Omnius unlock credit and use that program yourself. I used Omnius, personally. Mine is also the Rogers one.
You'll need to use the test point method and unlock the bootloader for cm9.
Better off with JokaWild and an ICS theme though IMO
Sent from a Galaxy far, far away

rom
captain67 said:
Test point is the only way for a Rogers one.
It's only available paid. You can have someone like Alejandrissimo help you remotely for $24, or buy an Omnius unlock credit and use that program yourself. I used Omnius, personally. Mine is also the Rogers one.
You'll need to use the test point method and unlock the bootloader for cm9.
Better off with JokaWild and an ICS theme though IMO
Sent from a Galaxy far, far away
Click to expand...
Click to collapse
To clarify to flash any ROM the unlocked boot loader is needed correct?

jul644 said:
To clarify to flash any ROM the unlocked boot loader is needed correct?
Click to expand...
Click to collapse
There are two gingerbread roms that are stock-based and can be installed just by having root. Darkforest and T.E.A.M. The reason is because they don't modify any files that conflict with the bootloader.
Some others might work, but you'd have to experiment and it's very unlikely.
All others need an unlocked bootloader. Cyanogen, ICS beta, ICX etc. all need it.
Sent from a Galaxy far, far away

captain67 said:
There are two gingerbread roms that are stock-based and can be installed just by having root. Darkforest and T.E.A.M. The reason is because they don't modify any files that conflict with the bootloader.
Some others might work, but you'd have to experiment and it's very unlikely.
All others need an unlocked bootloader. Cyanogen, ICS beta, ICX etc. all need it.
Sent from a Galaxy far, far away
Click to expand...
Click to collapse
Locked ICS roms will start showing up once the official R800i ftf comes out as well.

Moved to Q&A Section, please post questions there. Hope you got the answers you needed!

ICS for locked bootloaders

Could it be possible?

No.

Could you explain me why? -.-

arturodelac said:
Could you explain me why? -.-
Click to expand...
Click to collapse
Because ICS requires an ICS kernel, which can only be flashed by using fastboot on an unlocked bootloader.
Flashing ICS on a locked bootloader will only reward you with a brick.

arturodelac said:
Could you explain me why? -.-
Click to expand...
Click to collapse
Cause you need a Kernel that is made for ICS, and as long as your bootloader are locked you are going to be without ICS, simple as that.

arturodelac said:
Could you explain me why? -.-
Click to expand...
Click to collapse
Because ICS requires a different kernel, which requires you to unlock your bootloader to flash.
________________________
Sent from my Xperia Play

I have heard that droid2global has an ics rom, and it's bootloader remains locked. It's got a bootstrap, but I didn't think that allowed a custom kernel.
Seriously though, just get your bootloader unlocked.
Sent from my Xperia Play using XDA

I fear for my warranty, and my old x8 could run a half assed ics with a locked bootloader, wished more developers cared for locked bootloaders

why would you want a half assed ics, and why would devs want to make a half assed ics for you.., we haven't got a working kexec yet, and that would likely be your only real option, the rest involve messy workarounds to try and patch together a working rom from gb kernal, and its not worth the devs doing so.
im sure those of us that do have unlocked bootloaders would rather the devs work on stuff to move forward the xplay community as a whole, than spend months of time trying to make a gb kernal work with ics because you want to keep your warranty....

Cm7

Hey I've just been reading posts on the forums and I had to ask, I since the play now supports recovery on locked bootloaders does that make custom roms possible? Specifically will any version of CM7 or 9 work on my bootloader LOCKED R800a (previously carrier locked to Telstra australia) sorry im completely over stock but don't have the money for a bootloader unlock right now
Sent from my R800a using XDA

nogggin1 said:
Hey I've just been reading posts on the forums and I had to ask, I since the play now supports recovery on locked bootloaders does that make custom roms possible? Specifically will any version of CM7 or 9 work on my bootloader LOCKED R800a (previously carrier locked to Telstra australia) sorry im completely over stock but don't have the money for a bootloader unlock right now
Sent from my R800a using XDA
Click to expand...
Click to collapse
Nope, never will either. Have to be able to flash a custom kernel which isn't possible without unlocking the bl. There's a thread around here talking about doing some backdoor crap to try and get around the bl, but it'll never happen due to lack of support for the xperia line in general. I'd say save that money up, it's so worth it

agraceful said:
Nope, never will either. Have to be able to flash a custom kernel which isn't possible without unlocking the bl. There's a thread around here talking about doing some backdoor crap to try and get around the bl, but it'll never happen due to lack of support for the xperia line in general. I'd say save that money up, it's so worth it
Click to expand...
Click to collapse
Hmm okay, I thought I read in another thread that there were some roms that didn't require a custom kernel...

A couple of ROMs don't require a custom kernel like: Gin2ics, NXT and others.
However all Cyanogenmod ROMs require custom kernels.

[Q] In need of guidance :)

Hello, and sorry for bugging everyone, but I have somewhat of a problem. I'll just start from the beggining.
First of all I own a SGS II, so I'm used to flashing roms and kernels custom stuff and all...on that. My girlfriend is the one who owns a Xperia Arc S (LT18a, US version if it's relevant or not). And for the live of me, I can't summon the courage to flash it, the process being somewhat different than the flashing of a S2. That's just idiot proof in my opinion, can't go wrong. I'm seeing all over the place guides and stuff for flashing a Xperia Arc S, and don't really know wich one is good/bad etc. So...the actual questions :
1. Where can I find the stock firmwares for Xperia Arc S ? I was hopping on a website something like sammobile for samsung, where I can find every release etc.
2. She now has 2.3.4 (I think not 100% sure) build 4.0.2.A.0.62 and from what I heard that cannot be rooted, or it involved something like unlocking the bootloader or something like that, safe to say that kinda freaked me out a bit.
3. I'm guessing that this build 62 is like on my samsung, where different stock rom's are differentiated by letters (eg. XXLPG, XWLPQ etc) so, someone please confirm that.
4. Is there any noticeable difference between these gingebread builds, cause if build 62 can't be rooted, I'll downgrade to previous build that can be more easily rooted.
5. I really need a idiot proof guide to flashing this thing. She has no warranty on it and I really don't want to mess it up
6. And last (finally, I know ) some links for safe versions of flashtool (equivalent of odin from what I understand) and firmwares, stuff I need to root it etc.
I apologise for such a long post but this stuff is pretty overwhelming for me. Also I apologise for spelling errors (english is not my first language)

Wow, the things we do for love...
OK, here's a quick run-down of how it works.
Firstly the bootloader thing: -
The bootloader is where the "kernel" sits. If you unlock the bootloader then you can pretty much put anything on the phone.
You can flash a custom kernel, and from there on you can use ClockworkMod recovery the same way you do on your Samsung.
(
custom kernels have ClockworkMod recovery built into them since the XPERIA doesn't have a "/recovery" partition for the standard ClockworkMod recovery.
If that didn't make sense then here's a translation "There's no special space for CWM recovery on Sony phones! So custom kernels have CWM recovery built in for easy access."
When one of these kernels starts up the phone there's a point where the hardware buttons light up, and the LED flashes purple. If you press "volume down" at this point then the kernel starts up ClockworkMod recovery instead of booting the phone.
Most roms come with their own kernel that you can use like this. The XPERIA is different to the SGS phone because you can't flash a kernel from the phone itself. You need an unlocked bootloader and fastboot to flash a kernel.
)
So unlocking the bootloader is a good idea, but only after you've made a backup of all your stuff off the memory card.
Here's a really good thread that brings together all sorts of pieces of information that you might need to root the phone - http://forum.xda-developers.com/showthread.php?t=1653188
OK, so that's the unlock thing, and the kernel thing. Once the kernel has CWM recovery built in you can pretty much flash any rom you feel like flashing. There are already some JellyBean roms out that are fast and usable if you're prepared to read up on them and experiment a bit.
Next thing is the "BaseBand". This is the driver for the "cell phone radio". The part of the hardware that's actually responsible for behaving like a phone
Here's a thread where you can get all of the different base-band versions: - http://forum.xda-developers.com/showthread.php?t=1688049
Personally I know that base-bands 72 and 77 both work perfectly. Since they are the 2 newest versions you can choose which-ever one you want. The newer basebands give much better signal strength on the phone, and the call quality is really good.
Good luck with the experimenting - hope you enjoy.

Are you looking to upgrade her arc to ics? It is much easier to find the resources if that is the case
Sent from my LT18i using xda premium

navras1719 said:
I can't summon the courage to flash it, the process being somewhat different than the flashing of a S2. That's just idiot proof in my opinion, can't go wrong.
Click to expand...
Click to collapse
So is flashing on the Arc/S, so long as you can read.
http://forum.xda-developers.com/showthread.php?t=1304634

Thanks for taking the time to answer such a long and frankly, annoying post Seems I got a bit of homework, manny things to read, so...coffee and patience Hope everything will add up nicely

jman2131 said:
Are you looking to upgrade her arc to ics? It is much easier to find the resources if that is the case
Sent from my LT18i using xda premium
Click to expand...
Click to collapse
Not really, from what I hear ICS dumbs down the phone sort of speak. Now I really can't say, but I would test it out a bit, as long as I learn how to go back to GB.
Another thing that I'm a bit concerned is that all the stuff I find are for LT18i and my gf's phone is a american model LT18a. Will this be a problem ? Or that's just to differentiate the hardware stuff in them ? I hope flashing a LT18i firmware doesn't screw anything up

navras1719 said:
Not really, from what I hear ICS dumbs down the phone sort of speak. Now I really can't say, but I would test it out a bit, as long as I learn how to go back to GB.
Another thing that I'm a bit concerned is that all the stuff I find are for LT18i and my gf's phone is a american model LT18a. Will this be a problem ? Or that's just to differentiate the hardware stuff in them ? I hope flashing a LT18i firmware doesn't screw anything up
Click to expand...
Click to collapse
Yep, the differentiating factor is the hardware. the lt18i and lt18a roms are the same as far as I know. ICS does tend to be more resource heavy especially on the arcs but downgrading back to GB is basically the same method as flashing the ICS, just with another rom.
And also, in response to your first post, you can downgrade to the rootable build of GB, root that, and then flash the build 62 kernel back onto your phone so it's rooted and of the desired build
There's a lot of flashing guides on youtube regarding the arc s. I did a quick search and this one seemed pretty accurate and straight to the point.

Ok I pretty much understood the whole shabang, my last question is about the bootloader, if I unlock it once that's it ? I can flash whatever I want and not need to reunclock it...sort of speak. I read that for warranty reasons it can be relocked but that's not the case for me. Also for flashing a stock rom is it necessary to unlock the bootloader or that's just for rooting ?
Oh and almost forgot...if I understood right...I can downgrade...root...then upgrade to 62 and it will still be rooted ? On my samsung if it'a rooted and I flash abother stock rom...bye bye root, so pretty weird for me. Thank you again, I can't stress enough how helpfull you guys were.
Sent from my GT-I9100 using Tapatalk 2

unlocking the bootloader allows a whole lot more things to be done with the arc, but does make some apps defunct such as track id and music facebook like (which many can do without). flashing and/or rooting a stock rom doesn't need an unlocked bootloader because it's stock and yep, you can downgrade/upgrade, root, and then go back to what build you want by flashing a kernel only

jman2131 said:
unlocking the bootloader allows a whole lot more things to be done with the arc, but does make some apps defunct such as track id and music facebook like (which many can do without).
Click to expand...
Click to collapse
That only applies if you use the official method to unlock, use SETool and you'll retain DRM.
Sent from my CM9'd Ray

XperienceD said:
That only applies if you use the official method to unlock, use SETool and you'll retain DRM.
Sent from my CM9'd Ray
Click to expand...
Click to collapse
Thanks for the clarification. I never knew much about bootloaders and all that

XperienceD said:
That only applies if you use the official method to unlock, use SETool and you'll retain DRM.
Sent from my CM9'd Ray
Click to expand...
Click to collapse
If you could help me out with a SETool link and a basic set of instructions that would be awsome
LE: From what I've seen there are 2 versions of SETool and one's free the other is not. Can the free version be used to unlock the bootloader or do I have to get the full version ? Or even simpler, is there anyway to unlock it (LT18a) free and without losing DRM ?

XperienceD said:
http://forum.xda-developers.com/showthread.php?t=1304634
Click to expand...
Click to collapse

So basically from what I read there, no way for free unlock and retain DRM.

navras1719 said:
So basically from what I read there, no way for free unlock and retain DRM.
Click to expand...
Click to collapse
Follow the instructions up to the point just before patching and tell me what it says please?

if you unlock the bootloader NEVER UPDATE OVER THE AIR this will brick the phone.
The're 2 ways to unlock bootloader
1 via Sony web site but this only works for non branded phones,
2 is to pay if you use a service with setools this will unlock bootloader and make phone SIM free.
Xda member jinx13 offers this service contract him for more info.
Sent from my LT18i using xda premium

zolaisugly said:
2 is to pay if you use a service with setools this will unlock bootloader and make phone SIM free.
Click to expand...
Click to collapse
If SETool can unlock any handset I'm not sure why the S1Tool wouldn't, has anyone confirmed in the thread it doesn't work for the Arc S?

XperienceD said:
If SETool can unlock any handset I'm not sure why the S1Tool wouldn't, has anyone confirmed in the thread it doesn't work for the Arc S?
Click to expand...
Click to collapse
Since my bootloader was opened the setools has been upgraded to setools2 which now covers more phones but not sure which.
Sent from my LT18i using xda premium

XperienceD said:
Follow the instructions up to the point just before patching and tell me what it says please?
Click to expand...
Click to collapse
I'm sorry but what are you refering to ? The process that involves opening the backcover under the battery ?
Some additional info, it's not carrier branded, not sim locked...and using the service code in the dialer says bootloader unlockable : yes
Sent from my GT-I9100 using Tapatalk 2

Should have had this done already.
Sent from my CM9'd Ray