LT18i not pick up 3G! - Xperia Arc Q&A, Help & Troubleshooting

My xperia arc s LT18i does no pick up the 3G although I flashed the baseband 85 and reboot several times. Thank you for helping me.
Android's version : 4.0.4
Basebande's version: 8x55-AAABQOAZM-20308G-85
Build's number: 4.1.B.0.587

For ICS, use baseband 77, 85 is better for JB.
僕のLT18iから送られてきた

Not pick up 3G !
popthosegaskets said:
For ICS, use baseband 77, 85 is better for JB.
僕のLT18iから送られてきた
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I flashed version 77 but still no 3G! Do you have another solution for me? Thanks

What did you do before this started?
In which region are you located at?

Not pick up 3G !
Someguyfromhell said:
What did you do before this started?
In which region are you located at?
Click to expand...
Click to collapse
I have not done anything before. I'm in Benin in Africa. Please help me!

Had you checked the option of WCDMA? Perhaps its in GSM only.

Same issue same firmware, 3G or H not appear but internet speed test at 3 to 5Mbps

Related

.36 Vs .64 Baseband

Hey guys, I was on the .64 Baseband but moved over to the .36 baseband. I noticed though that my download speeds through 3G were really bad compared to the more latest .64 baseband. Has anyone else had poorer 3G downloads with .36 ?
Thanks.
panzerscope said:
Hey guys, I was on the .64 Baseband but moved over to the .36 baseband. I noticed though that my download speeds through 3G were really bad compared to the more latest .64 baseband. Has anyone else had poorer 3G downloads with .36 ?
Thanks.
Click to expand...
Click to collapse
Did you modify or use a different build.prop between the basebands? There are config settings in the build.prop to define 3G speeds
Atarii said:
Did you modify or use a different build.prop between the basebands? There are config settings in the build.prop to define 3G speeds
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Click to collapse
Well after flashing the Baseband I did then flash via CWM the .Lib files to go with the baseband, aside from that, that was all I was told to do.
+1 i seem to have slow speed aswell as it keep cutting out and lower signal. i am on .32 but was on .62 i am using a .62 rom and the .32 libs

Baseband 66 and 64..

Got questions..
1. What is the different baseband 66 comparing 64?..better signal?
2. Which fw is baseband 66 include inside it?
sent from my Ericsson T10s
kumbangdesa said:
Got questions..
1. What is the different baseband 66 comparing 64?..better signal?
2. Which fw is baseband 66 include inside it?
sent from my Ericsson T10s
Click to expand...
Click to collapse
i think no difference in signal yet i use .62 firmware ..
bb66 has .69 firmware version

Problem Connect 3G (Arc S - ICS 4.0.4 - Stock Kernel)

guys, someone help me please! SE Arc S ICS 4.0.4 - Kernel Stock - baseband 77
I remember when I bought my ARC S, the version was Lt18A (mobile purchased in the Store Magazine Luiza, certified by Anatel, Brazil), working on 3G 850mhz/2100mhz! after updating the rom he went on to appear Lt18I, and for all I know, only works on 3G 900mhz/2100mhz. I think that's the problem, my phone stopped recognizing the 3G on 850MHz, which is available by Vivo in my area!
any way to change this? baseband, kernel, rom??
[email protected] said:
guys, someone help me please! SE Arc S ICS 4.0.4 - Kernel Stock - baseband 77
I remember when I bought my ARC S, the version was Lt18A (mobile purchased in the Store Magazine Luiza, certified by Anatel, Brazil), working on 3G 850mhz/2100mhz! after updating the rom he went on to appear Lt18I, and for all I know, only works on 3G 900mhz/2100mhz. I think that's the problem, my phone stopped recognizing the 3G on 850MHz, which is available by Vivo in my area!
any way to change this? baseband, kernel, rom??
Click to expand...
Click to collapse
baseband, most likely.
or to be sure, flash the entire ROM that dedicated fot LT18A, because LT18i is the international version
fakhreza said:
baseband, most likely.
or to be sure, flash the entire ROM that dedicated fot LT18A, because LT18i is the international version
Click to expand...
Click to collapse
ok..
I restore the PC Companion, I installed everything that was original as it came from the factory! however the error continues ... does not connect 3G in 850MHz frequency
will be hardware error?
I got the same problem with ICS but my phone is an Lt15a running on LT15a ICS 587 firmware it connects but but sometimes not
pleasee help??
[email protected] said:
pleasee help??
Click to expand...
Click to collapse
problem in hardware!! solved in assistance

[Q] Xperia Play 800i No Signal Indoor

Hello,
Every time I am inside the house I lose signal in my Xperia Play 800i except when I am outside, what annoys me is that my samsung phone and black berry have a signal everywhere I go. I already tried to switch my Xperia P to GSM and checked current APN settings,I even tried switching sim card to other phones, Is there anything I can do to resolve this? thanks in advance
Try flashing a different baseband.
Is there a different baseband you could recommend? This issue seems to be pretty common with xperia play
-36 baseband
CyberScopes said:
-36 baseband
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Click to collapse
Hello,
I have the flash tool ready but I don't know where I can download the -36 baseband, I've tried searching the forum and all I can find where just dead links.. Do u know of a link where I can download it? and could u please give me a step by step process on how to do it? appreciate your help thanks!

[Q] Play 3G Problem

Hi, I have a rooted xperia play R800i (unlocked bootloader and no simlocks) with stock rom 3.0.1.A.0.145 and 3G works fine (baseband 21-22). When I flash any other stock rom with higher baseband (tried 36, 56, 64), I lose 3G signal. I only get 2G connections. When I go into settings->Networks->Mobile Networks->Network Operators, I see only 2G operators. I have a Singtel connection (2100 mhz). On all firmwares I have tried, service menu says I have UMTS_1 UMTs_8.
The reason I want to go to new baseband (atleast 36) is to have custom roms and ICS on the phone. Giving up 3g is not really an option.
I have tried flashing old baseband after flashing custom roms (using flashtool, exclude system and kernel and then copying libs manually from old firmware for baseband) but I keep getting unknown baseband in settings->about phone. There is no voice or data signal if I do this.
Any suggestions to fix this problem will be very helpful.
XperiaRocks said:
Hi, I have a rooted xperia play R800i (unlocked bootloader and no simlocks) with stock rom 3.0.1.A.0.145 and 3G works fine (baseband 21-22). When I flash any other stock rom with higher baseband (tried 36, 56, 64), I lose 3G signal. I only get 2G connections. When I go into settings->Networks->Mobile Networks->Network Operators, I see only 2G operators. I have a Singtel connection (2100 mhz). On all firmwares I have tried, service menu says I have UMTS_1 UMTs_8.
The reason I want to go to new baseband (atleast 36) is to have custom roms and ICS on the phone. Giving up 3g is not really an option.
I have tried flashing old baseband after flashing custom roms (using flashtool, exclude system and kernel and then copying libs manually from old firmware for baseband) but I keep getting unknown baseband in settings->about phone. There is no voice or data signal if I do this.
Any suggestions to fix this problem will be very helpful.
Click to expand...
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Quick question. Did you try install ICS ROM after you installed new baseband?
Jecmenn said:
Quick question. Did you try install ICS ROM after you installed new baseband?
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Yes I did, phone works fine but no 3G, only 2g operators visible in network selection.
XperiaRocks said:
Yes I did, phone works fine but no 3G, only 2g operators visible in network selection.
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Click to collapse
Did you tried baseband from neo l's firmware?
I'm using it for a long time now, so i know it works. Maybe it will work for you too
http://d-h.st/46e
Exlude all, leave just baseband in flashtool, no extra files needed.
(make backup, just in case)
Sent from my R800i using xda app-developers app
Bakisha said:
Did you tried baseband from neo l's firmware?
I'm using it for a long time now, so i know it works. Maybe it will work for you too
Exlude all, leave just baseband in flashtool, no extra files needed.
(make backup, just in case)
Sent from my R800i using xda app-developers app
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Click to collapse
Thanks for your reply. Will try it out tonight. What rom+kernel should I try it out with please?
Thanks.
XperiaRocks said:
Thanks for your reply. Will try it out tonight. What rom+kernel should I try it out with please?
Thanks.
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Click to collapse
Should work on any rom/kernel combo.
I was mostly on stock ics and gb rom and lupus kernels, maybe you should try those first
Sent from my R800i using xda app-developers app
Bakisha said:
Should work on any rom/kernel combo.
I was mostly on stock ics and gb rom and lupus kernels, maybe you should try those first
Sent from my R800i using xda app-developers app
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Installed stock ICS with Lupus, installed new baseband (-87), but the same problem persists. Voice + 2G works fine, but 3G operators not detected. Any other basebands I can try please?
XperiaRocks said:
Installed stock ICS with Lupus, installed new baseband (-87), but the same problem persists. Voice + 2G works fine, but 3G operators not detected. Any other basebands I can try please?
Click to expand...
Click to collapse
Have you tried just the baseband for .79? Its a world FTF.
Here is the link from my collection:
http://d-h.st/Mbi
I also have a baseband that I am using its .80 baseband, I have the FTF and the flashable files for it as well. I was getting edge where I live, in the mountains, after flashing .80 I went to HSPA+. Big difference in reception strength and stability for me.
Let us know how it goes.
---------- Post added at 04:48 PM ---------- Previous post was at 04:43 PM ----------
Here is the link for the FTF of the 80 baseband and the flashable zip of the 80 libs.
FTF:
http://d-h.st/ljY
Flashable Libs:
http://d-h.st/0oW
Just in case you want to test it out.
Thanks, will try it out tonight. Will post an update on the results.
Thanks.
Hi,
Tried both basebands and still the same problem. Flashed whole 79 ftf and no 3G, tried baseband 80 with libs, still only 2G. 3G works fine as soon as I install the old ftf. A strange pattern I have noticed that I would like to share. The only firmwares that have worked for me are the ones starting with 3.x.x.x, anything with 4.x.x gives the same problem. Here are the firmwares I could find and I tried them out and they work fine.
Xperia PLAY_3.0.1.A.0.145_UK
Xperia_Play_2.3.3_UK_Generic
These basebands havent worked for 3G
R800a_2.3.4_North America Generic.ftf
R800i_4.0.1.A.0.283_(1247-6212).ftf
R800i_4.0.2.A.0.42_Generic_UK.ftf
R800i_4.0.2.A.0.58_EnhancedV2.ftf
R800i_4.0.2.A.0.58_Generic Hong Kong Trade.ftf
R800i_4.0.2.A.0.62_(1253-4437).ftf
R800i_4.0.A.2.368_World.ftf
MT25i_4.1.B.0.631 INDONESIA_SONY MOBILE by wewenk.ftf
R800i_-80_Baseband_GSM.ftf
R800_4.0.2.A.0.79.ftf
Are there any 3.x.x firmwares available I haven't tried which have basebands which might work with ICS? That would solve my problem I am guessing.
Thanks.
See if there is dome ftf you didn't try at
http://forum.xda-developers.com/showthread.php?t=2184897
And quick question, did you try to install doomlord's ics kernel and some stock-based ics rom on firware you have working 3g? (i mean, is it working if you DON'T flash newer firmware?)
And also, are apn settings same on working 3.x.x firmware and on any other rom you have only 2g (check them manualy, write on paper if you have to)
Sent from my R800i using xda app-developers app
Bakisha said:
See if there is dome ftf you didn't try at
And quick question, did you try to install doomlord's ics kernel and some stock-based ics rom on firware you have working 3g? (i mean, is it working if you DON'T flash newer firmware?)
And also, are apn settings same on working 3.x.x firmware and on any other rom you have only 2g (check them manualy, write on paper if you have to)
Sent from my R800i using xda app-developers app
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Click to collapse
Yes have tried installing DoomKernel ICS with stock ICS over 3.0.1.A.0.145, I get no network detection and get an Unknown Baseband in about phone. Also tried copying ouver the 7 lib files from the working rom into this setup but same error.
APN settings are the same across firmwares.
XperiaRocks said:
Yes have tried installing DoomKernel ICS with stock ICS over 3.0.1.A.0.145, I get no network detection and get an Unknown Baseband in about phone. Also tried copying ouver the 7 lib files from the working rom into this setup but same error.
APN settings are the same across firmwares.
Click to expand...
Click to collapse
Damn, you are really unlucky...
Even i am without ideas what you can do...
Maybe to try cm9 or cm10 roms...
Most desperate idea:
Do you have some friend who have newer rooted Xperia phone with ics or jb on it, and steal baseband libs from him
Sent from my R800i using xda app-developers app

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