Database Develop

[Q] Changing the Radio Frequencies on a Samsung GT-I9000

Phone Radio Compatibility Details Requested (both general and US T-mobile specific)
I have been doing a lot of researching regarding this phone and all of its cousins as well as how they will operate on the various US carriers. I have the following requirements for my next phone purchase:
1) Must be an Android device
2) Must have front facing camera (for international video calls to relatives)
3) Must be GSM (for compatibility with local prepaid SIM cards when traveling)
As AT&T and T-mobile are the only two carriers in the US (the only two viable ones at least, I don't know if any smaller carriers use GSM) and I refuse to renew my contract with AT&T that narrows it down to one option.
I have been researching the different carrier frequencies, both what they are and why they are different. It seems T-mobile decided to be special and as a result it is nearly impossible to get a T-mobile high speed compatible phone unless you purchase it from them directly. I almost want to call that evil, but it is easy to believe that is just a bad side effect rather than the intent.
Anyways, as we all know the Galaxy S has been severely nerfed by everyone except for Sprint. If Sprint only had a GSM phone that I could use internationally I would pick up their model, but alas it is not. I will not purchase the Vibrant because it lacks the front facing camera. My last option is the unlocked Galaxy S available abroad unless I am missing something.
Most of the online retailers I have seen all list different band frequencies and not even all of them have it divided into 2G/3G frequencies. I have some specific questions, but if you have any useful information for me I would appreciate it.
Question 1: Do the online retailers just suck, or are there truly many different frequency bands for the unlocked Galaxy S?
Question 2: Does anyone know of a Galaxy S phone that is fully compatible with T-mobile in the US (not the Vibrant, I need the front facing camera)? If not, would it be good enough?
Question 3: The radio bands I have ready about are usually divided into 2G and 3G categories. Is the phone radio physically divided into one for 2G and another for 3G, or is it the same radio and those are the frequencies USUALLY used by the different speeds? If I see the appropriate T-mobile high speed frequencies listed under 2G, would that mean the radio is in fact compatible with the T-mobile 3G because the radio can talk on that frequency, or is the hardware actually different and unable to comprehend the 3G speeds?

Bumping my own thread and also wondering if anyone has any recommended vendors to buy the international Galaxy S in the United States.

i bought mine from handtec.co.uk and it is working ok..
beware though that at&t unfort. in my error has been slowly getting rid of 1900 3g and more 850 3g which does not work on the phone..
at least at home the microcells are 1900 3g.

Radio chip/antennae changes?
It seems the internal Galaxy's electronics is all the same or modular. Is there a chance to take the radio module out of T-Mobile body and put it into the Sprint's nice hardware? How easy it is to obtain the desired component?
related post: http://forum.xda-developers.com/showthread.php?t=718041

[Q] Which CSC (Phono/radio) version will give the best results?
I'm wondering what CSC-version (Or is it the Phone/Modem?) will give the best results in The Netherlands with Vodafone as telecom provider, or maybe... where can i find the stock version of the radio (and is it possible to use it with a root?)
I'm using Froyo (I9000XXJPC) - Rooted, but I'm wondering if my connection isn't worse since updating, I believe my 3G/HSDPA is weaker since then.
Anyone the same problem?

I also have the same problem, but already since upgrading to jm1 trough KIES.
I think we need a i9000XEN CSC.

shumix said:
I also have the same problem, but already since upgrading to jm1 trough KIES.
I think we need a i9000XEN CSC.
Click to expand...
Click to collapse
Is the "i9000XEN CSC" the stock one?

I'm not on JPC but changing from JM3 to JP2 (modem) actually makes my GSM signal and wifi sort of worse, dropping 1-2 bars at the exact same location compare to JM5

CSC has NOTHING to do with reception or 3g whatsoever... its just branding stuff and APN etc...
the MODEM file is the one you need to look out for!
Right now i'm on JM1 (rev03) with the appropriate modem file and i have no problem whatsoever!

BackfireNL said:
CSC has NOTHING to do with reception or 3g whatsoever... its just branding stuff and APN etc...
Click to expand...
Click to collapse
You sir, are wrong.
I have a Bell I9000M and flashed the new HK JP2 Froyo to it. I lost my 850mhz UMTS Band. I then flashed back to stock JH2, including the modem and still no band. The only thing that fixed it was doing the *#272*xxxx# CSC select. Once I did that, bingo, 850MHZ Reception.
I know what you're saying SHOULD be correct, but unfortunately, it is not.

I'm still correct! CSC contains carrier costumizations. Which also can contain settings to ENABLE the 850mhz radio band!

BackfireNL said:
I'm still correct! CSC contains carrier costumizations. Which also can contain settings to ENABLE the 850mhz radio band!
Click to expand...
Click to collapse
So, enabling/disabling a band doesn't have anything to do with reception?
So, when I get no reception because I'm in an 850MHZ ONLY area, which is disabled by the CSC. The CSC has nothing to do with it? I don't see the logic there, but alright.

You can use whatever CSC you want as long it enables the 850MHz band. It doesnt matter what CSC...
Modem file is the one that contains the drivers for the radiochip etc... A better modem file means that you can get higher 3G/Wifi speeds or even have better reception.
The CSC only contains the setting to enable the band.. nothing more nothing less

BackfireNL said:
You can use whatever CSC you want as long it enables the 850MHz band. It doesnt matter what CSC...
Modem file is the one that contains the drivers for the radiochip etc... A better modem file means that you can get higher 3G/Wifi speeds or even have better reception.
The CSC only contains the setting to enable the band.. nothing more nothing less
Click to expand...
Click to collapse
Cool man, I was directly referring to:
BackfireNL said:
CSC has NOTHING to do with reception or 3g whatsoever... its just branding stuff and APN etc...
the MODEM file is the one you need to look out for!
Right now i'm on JM1 (rev03) with the appropriate modem file and i have no problem whatsoever!
Click to expand...
Click to collapse
Which was wrong. No service due to CSC = No Reception. Plain and simple. You can argue what you meant all day, it's not what you said.
I'm done with this. I apologize to the OP for having this thread turn into this childishness.
Have a good day.

BackfireNL is right. Selecting a CSC indicates which band/frequency the radio will use according to the place you are.

dnsp said:
BackfireNL is right. Selecting a CSC indicates which band/frequency the radio will use according to the place you are.
Click to expand...
Click to collapse
Uhh, that's what I said, disagreeing with his "CSC has NOTHING to do with reception" comment.
Just so you two know, the actual Merriam-Webster definition of reception is:
"the act or action or an instance of receiving"
CSC not allowing 850MHZ = No Reception.
If you're taking about small increases/decreases in quality of reception, then absolutely yes, CSC has no effect. But that is not what was stated.

Confused...
Okay... thanx, both of you!
I've learned a lot new thinks...
Finally... I understand that I must use the Modem file if I have issues with the reception of the 3G network, but which version should give me the best results for my provider (Vodafone/Netherlands) and the new Froyo (JPC), and where can I get that modem file?

The Radio Chip in the SGS
ht tp://ww w.triquint.com/prodserv/more_info/proddisp.aspx?prod_id=TQM6M9014
(remove spaces)
That is the chip, now if I understand that right, it is a Pentaband radio. So that would mean it is all locked out in software.
No?

Users in the U.S., What Radio are you using?
I am running CFLagFix1.60(StockXXJF3) and using AT&T.
Everything works fine, except for a weak signal.
I can receive and make calls, but at times have calls dropped.
My home is in an area where there is a weak signal.
I am not try to get 3G, just a stronger signal.
May not be possible, but worth a try.
Signal is fine when not at home.
I have tried the following Radios without boosting the signal.
MODEM_I9000XXJF3.tar
I9000UGJH2-Modem
MODEM_I9000XXJP2.tar
bell_I9000_radio - No signal with the bell_I9000_radio
Any suggestions, or is it a lost cause?​

Is this a haiku?
PS It would help telling us what carrier you are using it on.

[Q] Data drop on 3G/H with perfect connection

Bleh, I'm getting desperate here, looks like I'm the only one experiencing this.
This seems to applies to any modem I've tried so far on 2.2.1 roms. I get excellent reception (3-4 bars H or 3G) and yet data doesn't flow through in some areas while still maintaining that excellent connection. Usually fails more when I am indoor although again, the reception is in theory great.
Seems to be happening more often when I'm using 850 band but that's not really an indicator. I tried JL2, KC1, JQ1 and JPG (all worked on 850 no problem) but I still experienced the same data issue. Flashed various Doc rom (now on his latest 2.2.1 with SpeedMod K13e kernel).
Could it be my SIM card that's damaged ? I've been experiencing this for a long time but I remember the phone being ok when I first got Froyo on it and definitely ok with 2.1
Any ideas ?

Just stumbled on Roger's Captivate "latest" modem CWM flashable, UXJL1. Would it be a good idea to try and flash this one ?

VJRaider ROM for HTC Raider/Vivid/Holiday Issue

Hey guys I just got my new Raider LTE from bell yesterday, and decided to flash this rom "VJRaider ROM for HTC Raider/Vivid/Holiday"
I was just wondering if anyone else on the bell or any other network using this rom and the required kernel are having issues with connection speeds? I notice too that it jumps alot between 3g and hspa alot too, most I have gotten is 1.5 mbps on a speedtest.
Tested my Atrix and I got 14 mpbs same area and coverage.
Any help would be greatly appreciated.
Cheers

I guess the first question would be did you flash through fastboot on PC or using a different method?
Which of cache/dalvik/data did you wipe prior to installing the ROM?
Did you make sure the APN info in the Raider is consistent with the Atrix?

Natas82 said:
Hey guys I just got my new Raider LTE from bell yesterday, and decided to flash this rom "VJRaider ROM for HTC Raider/Vivid/Holiday"
I was just wondering if anyone else on the bell or any other network using this rom and the required kernel are having issues with connection speeds? I notice too that it jumps alot between 3g and hspa alot too, most I have gotten is 1.5 mbps on a speedtest.
Tested my Atrix and I got 14 mpbs same area and coverage.
Any help would be greatly appreciated.
Cheers
Click to expand...
Click to collapse
The 3G/H flicker thing is a know bug, even stock ROM has it, the difference is that stock ROM only shows 4G icon for every type of network, no matter if you are on a 3G, HSPA, HSPA+ or 4G network, it will always show the 4G icon.
For the speed you can check your APNs, it must be a different one from the one you are using on your Atrix. Try to delete every APN and create new ones based on the Atrix ones.

Awesome thanks guys, I had flashed back to stock to try and fix it, I also changed the apn settings and it seemed to make no difference, Bell uses some hybrid network so that could possibly have had am effect. Flashing back to custom Rom now that I know its a known issue.
Cheers

You could also try changing MTU through ifconfig, but this could cause reliability issues. So far, I've only changed MTU on the 802.11 radio for this phone.

[Q] Bell ICS RUU on Rogers Raider: Network Mode Question

Hello,
Prior to upgrading my (Rogers) Raider to ICS, I would have consistent "4G" service almost everywhere.
I installed the Bell Mobility RUU, added a Rogers APN and I'm in business. However, the service indicator stays on "3G" most of the time, but if I pick the phone up, I get "H" for about 10 seconds, then it reverts back to "3G". I've tried numerous APNs and none seem to make a difference.
Does anyone else have this problem? Better yet, anyone have a solution?
Thanks!
EDIT:
Through more research, I've found that the phone switches to H when using data and switches back to 3G when idle. While part of me likes that idea, does anyone know of a way to force the system to stay at H speed service unless it's not available? i.e. how every other phone I've ever had works

I have noticed this. I never even though about it. I switch back and forth from a Bell and Rogers cards all the time.

svc518 said:
Hello,
Prior to upgrading my (Rogers) Raider to ICS, I would have consistent "4G" service almost everywhere.
I installed the Bell Mobility RUU, added a Rogers APN and I'm in business. However, the service indicator stays on "3G" most of the time, but if I pick the phone up, I get "H" for about 10 seconds, then it reverts back to "3G". I've tried numerous APNs and none seem to make a difference.
Does anyone else have this problem? Better yet, anyone have a solution?
Thanks!
EDIT:
Through more research, I've found that the phone switches to H when using data and switches back to 3G when idle. While part of me likes that idea, does anyone know of a way to force the system to stay at H speed service unless it's not available? i.e. how every other phone I've ever had works
Click to expand...
Click to collapse
Rogers lies. Their rom probably shows 4G even when you are on 3g. Before I flashed the Bell RUU onto my phone (sim unlocked to Bell) it said 4G even though there is no LTE where I am. Once I had the bell rom it showed when I was on 3G and when I was on HSPA+. The phone switches to 3g when you aren't using data in order to save battery life. This is my third android phone and they all have done this. It most likely did with the Rogers rom but they altered it to show 4G anyways
Sent from my HTC Velocity 4G using xda premium

C.Flat said:
Rogers lies. Their rom probably shows 4G even when you are on 3g. Before I flashed the Bell RUU onto my phone (sim unlocked to Bell) it said 4G even though there is no LTE where I am. Once I had the bell rom it showed when I was on 3G and when I was on HSPA+. The phone switches to 3g when you aren't using data in order to save battery life. This is my third android phone and they all have done this. It most likely did with the Rogers rom but they altered it to show 4G anyways
Sent from my HTC Velocity 4G using xda premium
Click to expand...
Click to collapse
I don't dispute that they lie but I like the speeds I got before I upgraded to ICS. When I had Rogers' "4G" I would get an average download speed of 5 to 6 Mbps. When I was near LTE that increased to about 40Mbps. Now with this 3G/H combo I have, my speed is capped at about 700Kbps download.
So far, no features of ICS are worth the reduction of speed...as it is quite noticeable. I don't even see an increase in battery life to help justify things.
Thanks for your insight! Now I just debate whether I wait it out and flash a Rogers ICS radio when it becomes available or revert back to GB...

svc518: I'm curious... when you go to About Phone, then Network, what does it say under "Mobile network type"?
if you figure out how to flash back to a GB RUU, please share. My Bell Raider is on the Bell ICS RUU and I was not able to flash back to Bell GB RUU (it checked the HBOOT version and said it wasn't right... I assume because I'm on the newer Bell ICS HBOOT). I dunno, maybe I'm missing something simple.

LaZiODROID said:
svc518: I'm curious... when you go to About Phone, then Network, what does it say under "Mobile network type"?
Click to expand...
Click to collapse
It was constantly changing, depending on whether or not data was being used. I don't remember what exactly they'd change between but one was UMTS.
LaZiODROID said:
if you figure out how to flash back to a GB RUU, please share. My Bell Raider is on the Bell ICS RUU and I was not able to flash back to Bell GB RUU (it checked the HBOOT version and said it wasn't right... I assume because I'm on the newer Bell ICS HBOOT). I dunno, maybe I'm missing something simple.
Click to expand...
Click to collapse
I managed to get back to Rogers' GB then did the OTA update to ICS. My original problem is fixed: my phone stays on "4G" all the time and I get the download/upload speeds I used to.
Here is an overview of *as much as I can remember* of what ended up being successful for me. It was not simple (for me), took me a few tries, a few bootloops, lots of beer and a plethora of profanity. I won't be able to offer much assistance...so follow in my footsteps and appeal to Google if you get stuck:
Relock Bootloader --> Install Bell ICS Stock RUU (again) --> Unlock Bootloader --> S-OFF --> Install GB HBOOT from unlimited.io (their written directions are wrong for the Vivid...use the picture they have) --> Install Bell GB RUU
Make sure you find some set of instructions on a forum somewhere that seem to jive with those steps. In case of discrepancies, assume I am wrong. All these things change when you throw custom ROMs and Recoveries into the mix and I'm new at this. Google saved my ass, my engineering degree probably helped in the step by step research about what to do next...

i9000 cannot make or receive calls. modem problem?

Hi everyone, noob here so dun wanna start a new thread with my question since it is related to this matter and I was wondering if anyone can help me because I really can't figure it out anymore.
I have an International GT-i9000 purchased with Hong Kong and system specs I have running are
Gingerbread.ZSJW4 (recently flashed the official ROM from Hong Kong cuz I am anal and want to keep the same languages)
Kernal: 2.6.35.7-I9000ZSJW4-CL1147074
[email protected] #2
Bandbase version: i9000ugkg3
And I use AT&T in New York (I know, worse plan to use in dead zone capital of the US)
I had flashed the ugkg3 modem on it because the JW1 modem that was with the official ROM wasn't working out for me and I had heard this modem was the best for my area. Before it would either not pick up a signal when coming up from underground or the signal just go dead, which did not happen when my phone was on Froyo (on Froyo I did not have 850mhz enabled and it worked alright outside and sometimes in the house)
At first, the KG3 modem worked wonderfully, I was able to receive data in my house and was on 3 bars (compared to none to one before). However, I now notice that while I do have full bars, I cannot receive or send messages or phone calls (even though my brother's Note is able to do all that and it was next to my phone).
I also happens when I am outside as well.
The other day I was standing in front of the AT&T store near where I am and I still don't pick up a signal.
Or it would lose the signal and never pick it up again.
Unless if I really can't use 850mhz on my phone, which does not make sense because AT&T uses 850mhz.
I am real hesistant to try another modem, and I cannot figure out if it is a hardware issue or network issue, or is it just the wrong modem?
Can someone please share any insight?

Radio GSM / Módem:
KF1 (Perfectly Changes 2g to 3g)
use this

kzkan said:
Radio GSM / Módem:
KF1 (Perfectly Changes 2g to 3g)
use this
Click to expand...
Click to collapse
works in ATT?

kzkan said:
Radio GSM / Módem:
KF1 (Perfectly Changes 2g to 3g)
use this
Click to expand...
Click to collapse
my other question is, phone is not ICS, and I found the nexus S one...will it still work?
and can I just extract out modem.bin and flash via ODIN ?(somehow my phone won't do CMW recovery...)