About BaseBand - Xperia Arc Q&A, Help & Troubleshooting

I have experienced frequently loss of signal from my carrier in Brazil, so I want to change my baseband. I've searched and didn't find where specifically baseband locates in my cell phone.
1. Does it lie in /data, or /system or wherever?
2. When I flash a ROM, for example JJ's, is the BaseBand flashed along?
3. How can I backup my current BaseBand, in case the new one does not work properly?
4. Would a different BaseBand enhance my WiFi signal reception, which is poor now, but was better in ICS stock ?
I currently use JJ's Hybrid custom ROM and ArcKnight's Kernel.
Thank you very much!

quera said:
I have experienced frequently loss of signal from my carrier in Brazil, so I want to change my baseband. I've searched and didn't find where specifically baseband locates in my cell phone.
1. Does it lie in /data, or /system or wherever?
2. When I flash a ROM, for example JJ's, is the BaseBand flashed along?
3. How can I backup my current BaseBand, in case the new one does not work properly?
4. Would a different BaseBand enhance my WiFi signal reception, which is poor now, but was better in ICS stock ?
I currently use JJ's Hybrid custom ROM and ArcKnight's Kernel.
Thank you very much!
Click to expand...
Click to collapse
1. No, lies in completely different partition, which cannot be accessed.
2. No.
3. You can't, just note down the 2 last numbers, which you have currently and when something goes wrong, install that one back.
Even though, there is REALLLYY small chance of something not working properly.
4. Maybe.

Related

[Q] Newbie telus SGS2X owner please help.

Well after a few hours of searching these forums I have learned allot. I am new to android I switched from a blackberry. Now as any eager new phone owner would do I jumped in and rooted my telus galaxy s2x the first day i had it without doing anywhere near enough research. I then had to leave home for work for a long time and decided that I should return my phone to bone stock and start fresh with all the things i had learned. I have scoured these forums and the internet looking for the stock telus rom and kernal. I found links to both but so far have been unable to download them. Dead links? i have odin and have read the guides but without the software i am stuck. So i decided to register and post. now i just hope that someone will take pitty on me and my undeniably mis guided android antics. my current phone info is:
Model number: SGH-T989D
Android version: 2.3.5
Baseband version: T989DTLKJ3
Kernel version: 2.6.35.11
Build number GINGERBREAD.TLKJ3
Now as far as i know I only rooted the phone trying to remove the telus junk and useing LBE privacy gaurd for permissions. No ROM or Kernel tweaking. I am currently running Avast security to but am haveing doubts as to its usefullness. Hope that someone can point me in the right direction and thanks for your time!
The thing with the security, is that its rather hard to have a virus on Linux due to the nature of the system.
Without Root access, there is no access to system files.
I do not run Avast, and have yet to run into issues. Just know what you are installing and what you are granting root access.
First of all, you don't need to go back to stock rom and re-root again if you are willing to use a custom rom. Because, rooting related files resides under specific to your /system and /data directory which are already replaced when you install a custom rom and do a factory reset.
Moroever, if you go back to stock by restoring an original nandroid backup you will most probably like to loose CWM recovery. You probably wouldn't want to double flash CWM if you are going to root your phone again.
What I can recommend you is,
1) After you backup your stuff, do a wipe data/factory reset from CWM. That will allow you start fresh
2) Then, based on what you want to do:
a) If you want to install a custom rom:
Look for the dev forum and choose whatever you want. I am currently using Raverx3x BLACKEDITION ICS and it is awesome.
b) If you want to stick with original rom with root access:
http://forum.xda-developers.com/showthread.php?t=1356739
Let me know if I couldn't answer your question.
Thanks
So i did find the stock rom and wiped all data and did a clockwork wipe as well rerooted the phone. So now i am bone stock. Again thank you for all the help. I am going to go with a custom ROM and from the reading i have done they all seem fairly good. Now I am just curious about custom ROM's and how well they work with lets say google play apps as well as some of the others you can get such as LBE. I dunno why but my phone when plugged into the comp wont start the auto play for usb storage and wont show up in the computer tab? weird. unless i run kies or start odin. then the auto play pops and i can see the usb. then windows tells me there is corrupt data on my external usb and if i scan it it closes all the usb stuff and seems to reset itself? i dunno i think that is a comp issue not so much phone. I guess my biggest issue is compatibilty with apps and custom ROM's and the like. Also if I flash a custom rom will that take care of the insane amount of telus and google crap. I dont really need most of what the phone came with but i am leary of deleting apps and system tools that are on the phone. I dunno totally new to android and in quite over my head. more reading i do more questions i have haha.
Idk if that was a phone app thing...
But for future, can you break up those huge paragraphs? Its hard to absorb all that information.
Anyways, I've never had an issue with computer connectivity... Might want to reboot the computer? That's a start at least
Sent from my SGH-T989 using XDA
I will again suggest ravers rc8 ics rom. I havent seen any issues other than missing wifi calling. No bloatware at all. Rare FCs...
Btw I amnot sure 989-d is also supported by that rom, but worth trying definitely
Sent from my SAMSUNG-SGH-T989 using XDA
I am a telus user with the same device... As other user suggested ravers rc8 ics rom... I am using this rom and love this rom.. Works awesome... other than wifi calling and wifi hotspot..
mauserruger said:
I am a telus user with the same device... As other user suggested ravers rc8 ics rom... I am using this rom and love this rom.. Works awesome... other than wifi calling and wifi hotspot..
Click to expand...
Click to collapse
What modem are you using ? the original T989D's is KJ8 I think... ?
I was using it also but only up to RC6 until I switched to Darkside.. it has a t989 kernel but unfortunately required an ICS modem. After I flashed the Tmobile modem, I realized that I no longer have 4g. Its a price I am willing to pay for now.
EDIT: Turns out the modem is fine - only a bug in the ROM that does not display the 4G icon.
Rapalax said:
What modem are you using ? the original T989D's is KJ8 I think... ?
I was using it also but only up to RC6 until I switched to Darkside.. it has a t989 kernel but unfortunately required an ICS modem. After I flashed the Tmobile modem, I realized that I no longer have 4g. Its a price I am willing to pay for now.
Click to expand...
Click to collapse
Sorry way late on the reply was away with work... I am currently using the 4g blaze modem as I was having data drop with the KJ8
Rapalax said:
What modem are you using ? the original T989D's is KJ8 I think... ?
I was using it also but only up to RC6 until I switched to Darkside.. it has a t989 kernel but unfortunately required an ICS modem. After I flashed the Tmobile modem, I realized that I no longer have 4g. Its a price I am willing to pay for now.
EDIT: Turns out the modem is fine - only a bug in the ROM that does not display the 4G icon.
Click to expand...
Click to collapse
I currently have the basic stock ROM unlocked on Koodo so I'd prefer to have a stable wireless signal especially with the tethering hot spot... I think my phone has the KJ3 but you guys have KJ8 modem?
Model number: SGH-T989D
Android version: 2.3.5
Baseband version: T989DTLKJ3
Kernel version: 2.6.35.11
Build number GINGERBREAD.TLKJ3
(pure stock?)
How is the GPS in the Ravers ICS ROM? I basically need a functional GPS and mobile access point (tethering) to work amongst something stable while not being crippled.
I have flashed my old Captivate to the Cognition 4.1 ROM but am definitely a noob to my new SGS2 T989D which is quite a pleasant upgrade

[Q] Flashing ROM - Rooted but locked bootloader At&t

I have an At&t version of the Xperia Play (R800at). I have the phone rooted but the bootloader is still locked. I hate the bloated ROM that At&t has and wanted to flash a new one. I really like the Cola rom but it does not work on At&t. Is there a ROM I can flash on the stock At&t kernal that does not have all the bloat? I really just use the phone for calls, texting and games (mostly emulators). Can I go to another stock ROM? I would like 2.3.3 so I can run all of my converted PS1 games, I really don't want to reconvert them for 2.3.4. I do not know what info from my phone I would need to figure out what ROM to download and use. Any information would be greatly appriciated.
I have the same thing except my bootloader is unlocked. I've tried many of the roms on here myself but the baseband from AT&T doesn't give me the "can hear the other person but they cant hear me half the time" problem from the stock rom and I can get 4G on it whereas the other roms do not. Is there any roms that use the baseband from AT&T and get rid of the bloat or is there one that can just use the baseband from the stock rom? I used to have a Galaxy I so not being able to flash different basebands all the time is new to me.
--edit---
After poking around and ignoring some things different stuff said, I was able to get cyanogenmod 7.2 (freexperia) on my phone and I then installed the -36 baseband and libs after and everything appears to be working good so far. Going to test a bit with phone calls yet, but as long as I can get online and my phone calls arent messed up this is exactly what I wanted because I love cyanogenmod, I just know it kept saying I needed to have a specific set up but that never worked for me with the baseband, I just went for it and I think the problem I always had was not having the lib files to upload after flashing cyan
devi59 said:
I have the same thing except my bootloader is unlocked. I've tried many of the roms on here myself but the baseband from AT&T doesn't give me the "can hear the other person but they cant hear me half the time" problem from the stock rom and I can get 4G on it whereas the other roms do not. Is there any roms that use the baseband from AT&T and get rid of the bloat or is there one that can just use the baseband from the stock rom? I used to have a Galaxy I so not being able to flash different basebands all the time is new to me.
--edit---
After poking around and ignoring some things different stuff said, I was able to get cyanogenmod 7.2 (freexperia) on my phone and I then installed the -36 baseband and libs after and everything appears to be working good so far. Going to test a bit with phone calls yet, but as long as I can get online and my phone calls arent messed up this is exactly what I wanted because I love cyanogenmod, I just know it kept saying I needed to have a specific set up but that never worked for me with the baseband, I just went for it and I think the problem I always had was not having the lib files to upload after flashing cyan
Click to expand...
Click to collapse
Sorry, don't mean to hijack the topic, but could you describe the issue where you can hear the other person but they can't hear you a little more? I seem to frequently encounter a similar situation where it could take 10+ seconds before the other person can hear me speak, but I can hear them the whole time. By now most of my friends and family know how to deal with it, but before they would just hang up on me. If I reboot the phone, it fixes it for a while, but then it comes back after some time and takes another reboot to resolve.
The phone itself is a SIM unlocked, bootloader locked R800a model from last year's Google I/O. It uses the same frequencies as AT&T for 3G and 2G and I'm using it on AT&T as well. I have the Generic North America 4.0.2.A.0.42 (Android 2.3.4) ROM installed, but it has Baseband 8x55A-AAABQMAZM-203028D-56 and not -36. Is -36 the best to use with AT&T?
same phone
I have the exact same phone and I had the exact same problem. TrueAncestor v. 1.4 worked wonders. It was easy to do, it was nicely themed, and the bloatware is all gone! I really recommend.
Here is a list of ftf files: http://forum.xda-developers.com/showthread.php?t=1589399
Try flashing a Generic, I dont know how the R800at response to generic R800i, but i have a R800a that has no issues when flashing it with R800i, also i think you could clean the bloatweare with Flashtool, might want to try it.
Last night I installed the -36 baseband from this topic:
http://forum.xda-developers.com/showthread.php?t=1469473
So far, so good. Calls and data both work as normal. I'll need to do more testing to be sure whether it fixed my problem or not.
I should also note that all I did was use Flashtool to flash the baseband .ftf file over top of my already installed North American Generic 4.0.2.A.0.42 that I got from this topic:
http://forum.xda-developers.com/showthread.php?t=1326459
There's another topic on this same thing and it sounds like using the -36 baseband with the .42 firmware is a good way to go for the Xperia Play 4G (R800at). You can find that one here:
http://forum.xda-developers.com/showthread.php?p=26972055#post26972055

[Q] Radio flashing?

Assuming that most users use their phone in the region they bought it why would you flash a another one, since the original was probably optimized for their region. Will flashing all these various ROMs also change my radio? Also...is radio the baseband?
RE: Radio Flashing
cstrips said:
Assuming that most users use their phone in the region they bought it why would you flash a another one, since the original was probably optimized for their region. Will flashing all these various ROMs also change my radio? Also...is radio the baseband?
Click to expand...
Click to collapse
Depending on where and when you got your phone could mean a newer, faster radio might have come out. I do believe radios are area specific, but not sure.
I think any radio for the t989 will work but your data speeds, call clarity or even phone performance might take a hit.
Usually roms wont erase or put another radio on and if they do you can always just flash the proper radio.
Generally going from rom to rom while doing a full wipe will not remove your installed radio. And yes the baseband is your radio version.
Hope this helps, I only have a basic understanding and usually try to stick to the radio my provider pre-loaded.

[Q] Reflashing stock Radio on 4.2.2

Hi I have a simple question, some people on Google + suggested me to reflash only the stock radio because I really have some problems in Canada to have signals on 4.2.2 roms. The stock radio was running on 4.1.1, is there any risk ? On stock I was reaching -95 signal for 4G (HSPA +) easely now I cant even have 1 bar.
Flashing news ROMs doesn't flash a new radio. But to directly answer the question: yes, you can flash whatever radio you want (as long as it is for your phone model).
Aerowinder said:
Flashing news ROMs doesn't flash a new radio. But to directly answer the question: yes, you can flash whatever radio you want (as long as it is for your phone model).
Click to expand...
Click to collapse
This is right what I was thinking, so i'm assuming that 4.2.2 get the same signal force but the icon isn't representative. It make sense. Thank you !

Problems installing Sense based roms

For some reason, every time I try to install a sense based rom, it never boots.
I'm fairly new to flashing, and have flashed 4 or 5 aosp roms. Every time I install one of those, it always works correctly, no issues.
I have tried to flash several Sense based roms, such as ARHD 20.1, Insert Coin, and nv, and each time, it never works. I always do a factory wipe beforehand as well as a wipe in the aroma installer. It will go thru the process and install, and then prompt me to reboot, which it does. Once the screen comes back onm however, it just hangs on the white htc screen with the red development text. When i get back to the hboot, itll show nothing for os.
I thought the issue may be that i dont have the latest firmware, but even people that dont have the latest firmware still are able to boot into the rom. Also, I just tried the NV rom which is based off my firmware, and it still gives me the same trouble. Does anyone know what I'm doing wrong?
I'm running an ATT Htc One m8, rooted, unlocked, s-off with sunshine, twrp recovery
mattprice86 said:
I thought the issue may be that i dont have the latest firmware, but even people that dont have the latest firmware still are able to boot into the rom.
Click to expand...
Click to collapse
Give the ROMs about 10 minutes, and I bet they will boot. The extremely long boot time, and lack of boot animation (another symptom of this issue) makes a lot of folks believe the phone is stuck/frozen, when in fact its just taking a reeeeeally long time to boot.
If its true that the ROMs in fact never boot, it might just be an issue with your recovery. fastboot erase cache and either re-install recovery, update to the latest version, or try another recovery (Philz).
Even if the Sense ROMs boot, you might find some serious things are broken with your outdated firmware, such a broken WiFi. So I suggest either update your firmware or stick or ROMs based on your present firmware.
Ok thanks, i will try again. Ive read a bunch of threads about updating my firmware but couldnt find an answer to a question I have about it.
If I upgrade my firmware to the latest WWE 3.28.401.6, will it mess up my ATT settings like the bands? Also, will it erase my internal sd card?
mattprice86 said:
If I upgrade my firmware to the latest WWE 3.28.401.6, will it mess up my ATT settings like the bands? Also, will it erase my internal sd card?
Click to expand...
Click to collapse
Firmware includes the radio baseband, so it may cause issues with reception on AT&T. It seems at least a couple folks have been flashing the 3.28 firmware, but I haven't seen enough reports to give me a warm and cozy feeling. With S-off (which is required to flash the firmware, anyway) you can always revert. But still, basic reception is more important to me than a couple updated features. Personally, I'll probably wait until the 3.x firmware specific to AT&T starts rolling out.
It seems like the M8 is radio agnostic like the Nexus 5 based on my experience.
I am on Rogers and flashed the latest firmware and my LTE works no issues.
The latest firmware is supposed to be EU so technically those North American bands are not supported but it works no issue.
Leads me to believe that the radio does not matter like the N5 where the 820 and 821 radios were interchangeable.
HTC One M8
Thanks redpoint, you were right, I gave it some time and it did come on. You always seem to be the one answering my questions, I appreciate it.
As for the new fw, I was thinking that would happen too from what I've read, I just needed someone more experienced to confirm that. I think I'll wait as well.
Thanks again
Elisha said:
It seems like the M8 is radio agnostic like the Nexus 5 based on my experience.
I am on Rogers and flashed the latest firmware and my LTE works no issues.
The latest firmware is supposed to be EU so technically those North American bands are not supported but it works no issue.
Click to expand...
Click to collapse
On the 2.x firmware, some folks in North America (I can speak mostly of AT&T specifically, although there are a lot of network similarities with Rogers) had varying degrees of issues with the "international" firmware. For some, the reception was worse, and others had NO SIGNAL whatsoever. Probably depended on what bands AT&T was using in their specific market.
Can't say whether 3.x firmware is the same way. But in my experience (or at least, reading reports by others here), I would have to disagree this phone is in any way "radio agnostic", at least from a software perspective (as the hardware is common among at least GSM versions, and baseband software is the only difference - but that is a slightly different topic).
So what is the latest firmware I can flash that's been known to work? I've seen that viper one is based off the 2.xx fw so do you know of anyone who's flashed it with att variant without any problems?
mattprice86 said:
So what is the latest firmware I can flash that's been known to work? I've seen that viper one is based off the 2.xx fw so do you know of anyone who's flashed it with att variant without any problems?
Click to expand...
Click to collapse
http://forum.xda-developers.com/htc-one-m8/development/firmware-flashing-panic-attacks-t2824048
No probs.
redpoint73 said:
On the 2.x firmware, some folks in North America (I can speak mostly of AT&T specifically, although there are a lot of network similarities with Rogers) had varying degrees of issues with the "international" firmware. For some, the reception was worse, and others had NO SIGNAL whatsoever. Probably depended on what bands AT&T was using in their specific market.
Can't say whether 3.x firmware is the same way. But in my experience (or at least, reading reports by others here), I would have to disagree this phone is in any way "radio agnostic", at least from a software perspective (as the hardware is common among at least GSM versions, and baseband software is the only difference - but that is a slightly different topic).
Click to expand...
Click to collapse
For the record, I have an AT&T model and am using the 3.xxx.xxx.6 firmware with absolutely Zero issues as far as signal. I get the exact same reception I did stock, and Very, Very similar reception to what my old Optimus G did in the same locations.
This indicates that there must be either a difference in hardware revisions (related to how some M8's can be firewater'd, whereas others need Sunshine), Or, the int'l radio firmware may not support the bands that are used on some towers in some locations. I'm leaning toward the former. For the record, my M8 is a "whelp", and I had to pay for Sunshine.
OMGMatrix said:
For the record, I have an AT&T model and am using the 3.xxx.xxx.6 firmware with absolutely Zero issues as far as signal. I get the exact same reception I did stock, and Very, Very similar reception to what my old Optimus G did in the same locations.
This indicates that there must be either a difference in hardware revisions (related to how some M8's can be firewater'd, whereas others need Sunshine), Or, the int'l radio firmware may not support the bands that are used on some towers in some locations. I'm leaning toward the former.
Click to expand...
Click to collapse
My guess would be the former as well. Keep mind that AT&T uses five different bands for LTE depending on your market region. Also keep in mind that travelling to another location may result in losing LTE reception (when you otherwise would have LTE on a AT&T specific radio).
Although none of this explains why I've seen some folks get NO SIGNAL whatsoever on AT&T's network after flashing the international firmware (2.x version, haven't seen any complaint yet on 3.28). Even if no LTE, those folks still should have been able to get HSPA and/or GSM since those AT&T bands appear to be supported by EMEA specs. So it leads me to believe there is something else going on aside from just band compatibility. Such as the network not falling back properly to HSPA/GSM.
I certainly don't have an issue if folks want to experiment with the 3.28 firmware on the AT&T network (as long as you know what you are doing, and are aware of the possible issues). Its certainly tempting with the 3.x based custom ROMs coming out. I might even experiment myself if I free up some time. But that spare time is a bit of a premium for me right now; and I also can't really afford ATM to have the possibility of reception issues or no service.
I was able to successfully upgrade my firmware to the 2.xxx by using skull dreams' method. As soon as my rom loaded, however, WiFi and data weren't working. I read through the thread and found that clearing cache and dalvik would fix it, so that's what I did and it worked. (initially I tried to wipe both at the same time, but it gave me errors; further reading showed I needed to wipe cache first and then dalvik).
I would now like to upgrade to the 3.xxx fw so I can install arhd 20.3, but want to know, if I upgrade my fw and it messes up, can I just do the same renaming and putting it on ext SD card to downgrade back to the 2.xx fw?
mattprice86 said:
I was able to successfully upgrade my firmware to the 2.xxx by using skull dreams' method. As soon as my rom loaded, however, WiFi and data weren't working. I read through the thread and found that clearing cache and dalvik would fix it, so that's what I did and it worked. (initially I tried to wipe both at the same time, but it gave me errors; further reading showed I needed to wipe cache first and then dalvik).
I would now like to upgrade to the 3.xxx fw so I can install arhd 20.3, but want to know, if I upgrade my fw and it messes up, can I just do the same renaming and putting it on ext SD card to downgrade back to the 2.xx fw?
Click to expand...
Click to collapse
You could always restore the backup you should be making before you do any mods on your phone. That would be the safest way.
So if I upgrade my fw then restore a backup, I will lose my fw changes?
I make nandroid backups before I do any, so I have approximately 60gb of backups on an external HD, and I always keep 1 or 2 on my internal and external storage

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