Develop Bugs

[Q] Change preferred network order?

I have a slightly odd requirement, and I wondered if there was any way to fix it:
My carrier has a partnership with a second carrier so we can roam on each others networks for no extra cost.
Where I live, my own carrier only gives me a 2G signal, whereas the other gets 3G. Thing is, I have to physically select the other network. If it's on Automatic, it always "prefers" my own carrier.
This is fine until I'm on the other side of town where the other network gets no signal at all. I then have to manually select my own carrier again!
Is there any way to get it to prefer the other network, or even more ideally, prefer the one that offers the better signal at any given point?

Hi,
a bit of *bump* because I'm struggling with the same issue. I had such option on my previous samsung i780 (oooold) and it worked like a charm.
Currently my mobile operator has 2 roaming partners and if I want to change quickly the preferred order (because in some location it might have better coverage but only there and only for a while) I wold have to switch simcard to the old phone...
Isn't there at even a separate aplication to do that? Does andorid API allow such modification?

Glad I'm not the only one!
Interesting you mention an app to do it... i've not looked actually. If an app can access the list of networks and actually set the phone to use one, then I guess it would be possible. I'll check it out...

to the best of my understanding this is somewhat network option/setting and when suggesting an app I was thinging abount some way to read this setting, modify it and then save/send back to network. It would be a matter of access to the network settings from the API and knowledge how to operate it....

Still investigating this. Looks like the stuff to access the list of networks is in some internal APIs, so a little harder to access. I'll post back when I learn more...

Hey I hope you guys can figure this out have you tried the *#*#4636#*#* command and changed the radio? This will select the most preferred network.. e.g. I'm with Telstra in Australia, the stock radio defaults to 2100MHz but Telstra's HSPA+ is 850Mhz.. so I have to switch to AUS2 radio so it defaults to that every time.
Sent from my Galaxy Nexus using xda premium

@Simmo3D
It's not about the radio band but about the service provider itself.

Can the TMobile S3 work on their refarmed 3G (1900MHz) network?

Hi,
From the specs, the TMobile S3 supports 1900MHz 3G network.
Does anyone know for sure if the TMobile S3 work on their refarmed 3G (1900MHz) network?
If yes, how do you change from the current 3G freq to the refarmed freg?
Thanks.

They are in the orocess of refarming. Some places are done, some are not. The phone should automatically choose the best available band to use. There are ways to force it by using the service menus actvated by dialer code, but it's a hassle to mess with every time. Plus, on the T999 I don't think you will ever see it say 3G without a mod. So you coukd be using it but it woukd say H or still 4G because of the way its coded. (If I'm remembering right)
Sent from my SGH-T999 using xda app-developers app

Yes, the Galaxy S3 does support 3G PCS(1900 Mhz). If you wanted to know what band you're using, just type *#0011# in the Phone app. In the first line, you will see something like "Band4" in the first line, which will tell you what band you're on. Band4 means AWS (1700/2100). Band2 means PCS (1900).
To force a certain band, type *#197328640# in the Phone app and then hit the following in the secret menus: [1]UTMS -> [1] DEBUG SCREEN -> [8]PHONE CONTROL -> [7]NETWORK CONTROL -> [2]BAND SELECTION.

It's "reframed" not "refarmed".
Sent from my SGH-T999 using xda premium

No its refarmed. Meaning that they were using it in the GSM system and had to carve it out for use in the UMTS system. Yes the Galaxy s3 will work on UMTS 1900. It is best though to let the phone decide as the carrier is using settings to best choose where you should be. For instance the single 1900 UMTS carrier wont be able to support HSPA 42+ until they add a 2nd 1900 Mhz carrier.

sorry erase this comment
Sent from my SGH-I747 using Tapatalk 2

Thank you all for your replies. I will get the phone in a few weeks and try it out.
DocHoliday77 said:
The phone should automatically choose the best available band to use.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
Will the phone know if a node is congested?
At my work place, my HTC Sensation 4G shows a "H" with good signal (4 bars). But the data speed is really slow, around 100kbps. My guess is that either the node is congested, or the current 3G signal is blocked by the building. My thinking is that if I switch to the new freg (when it is available), there will be less users and the signal will penetrate building better so my speed will improve.
Will the S3 save me in this situation, or my thinking is completely off?

http://www.airportal.de/

foit2 said:
To force a certain band, type *#197328640# in the Phone app and then hit the following in the secret menus: [1]UTMS -> [1] DEBUG SCREEN -> [8]PHONE CONTROL -> [7]NETWORK CONTROL -> [2]BAND SELECTION.
Click to expand...
Click to collapse
You can actually jump right to the band selection screen with *#2263#

[Q] RF Band Selection on AOSP rom

Hi all,
Been lurking around forums for awhile and have also been helped and taught greatly by the discussions. Just became a member recently and this is my first post.
So I was flashing a couple of roms from CM 10.1 to stock android mod but noticed I couldn't get to the hidden menu *#2263# screen that I had with my default AT&T Samsung touchwiz that let me choose which LTE band to latch on to. I'm assuming this is because this is because all the roms are AOSP-based.
I was wondering if there was a hidden menu option for AOSP-based roms that had the same functionality as *#2263# (only available in touchwiz/Samsung base where you can choose specific LTE bands) instead of just the *#*#4636#*#* (where you can only choose which network but not the exact band) or if there are any apps out there that have this option of choosing a specific LTE frequency band.
I'm in this weird situation where we're testing only the LTE network of our provider and want to block off other fallbacks, etc..
Thanks for any feedback and suggestions.

bump

bump for help

Partially. ..
With CM based variant AOSP builds. ...you can go into your settings. ..then search networks. ..
Once the network is found...select it...
Then back arrow takes you to the 2g only selection option. .
Then select it...
ATT has a RAT restricted network. ..and has disabled the ability to select individual bands as we could with previous generation smart phones. .
This edge only work around gets better signal in poor signal areas. ..but will not persist through a reboot. ..
You are limited to this hack unless you switch networks entirely. ..g
Sent from my SAMSUNG-SGH-I317 using XDA Premium HD app

gregsarg said:
Partially. ..
With CM based variant AOSP builds. ...you can go into your settings. ..then search networks. ..
Once the network is found...select it...
Then back arrow takes you to the 2g only selection option. .
Then select it...
ATT has a RAT restricted network. ..and has disabled the ability to select individual bands as we could with previous generation smart phones. .
This edge only work around gets better signal in poor signal areas. ..but will not persist through a reboot. ..
You are limited to this hack unless you switch networks entirely. ..g
Sent from my SAMSUNG-SGH-I317 using XDA Premium HD app
Click to expand...
Click to collapse
Thanks for replying.
I'm not sure what you mean by ATT disabling the ability to select individual bands as, with a stock Samsung AT&T rom, I am able to do *#2263# and get to a RF band selection menu. However, with stock Google edition or other AOSP roms, this *#2263# hidden menu is nowhere to be found.

Force band 12

One of the good things about the gs6 is the ability to for b12 and even better ability to choose preferred band in automatic mode.
Does the m9 have some sort of ability like that?

You are talking about the WIFI channel 12 (which is illegal to put your WIFI on in the US)?

Actually I think he is talking about forcing a specific LTE band... (in this case LTE Band 12 which I think is for T-Mobile). Specifically accessing the LTE Band service menu.
For any Samsung device you would enter *#2263# and the "LTE Band" service menu would open up and you can force a specific band. IF this is what he is talking about, it’s actually a great feature because you can "lock in" LTE to a specific band, I use to do this all the time in the Philippines so I wouldn't get kicked off the LTE band. You can also see what LTE bands the phone supports.
When I had the M9, I looked everywhere and tried to find the code to access the LTE menu but I was unsuccessful. Maybe someone here has the code to access the LTE service Band menu. There were some generic codes that work for Google in general BUT none of them worked on the M9.

Try *#*#4636#*#*

crx4xharder said:
Try *#*#4636#*#*
Click to expand...
Click to collapse
That only can forcelte in general
mcmikelw said:
Actually I think he is talking about forcing a specific LTE band... (in this case LTE Band 12 which I think is for T-Mobile). Specifically accessing the LTE Band service menu.
For any Samsung device you would enter *#2263# and the "LTE Band" service menu would open up and you can force a specific band. IF this is what he is talking about, it’s actually a great feature because you can "lock in" LTE to a specific band, I use to do this all the time in the Philippines so I wouldn't get kicked off the LTE band. You can also see what LTE bands the phone supports.
When I had the M9, I looked everywhere and tried to find the code to access the LTE menu but I was unsuccessful. Maybe someone here has the code to access the LTE service Band menu. There were some generic codes that work for Google in general BUT none of them worked on the M9.
Click to expand...
Click to collapse
*#2263# doesn't work for me
But yes LTE band 12

##DATA# on Sprint lets you do something like this, but I believe that code is Sprint-specific.

Useful tip for switching LTE bands in the G710EAW (and possibly other versions)

If you try to change bands in the service menu (e.g. from Band 4 to band 2) and you have LTE but phone calls don't work at all (just says call ended instantly), just go to "network mode" and select automatic, which will get voice working again on your new band.
Turning the sim card off and back on won't fix that--that will just make the band reset to default (with voice working) which isn't want you wanted if you were switching bands.
This can be useful on low tier providers if one band is lagging horribly and another band is more reliable.

I just recently discovered the service menu, does this actually enable bands that normally aren't active? I see Band 71 here which I thought was only available on the TMobile US variant, yet here I am with the ULM model and it shows it in the menu. I'd like to enable it in case I'm ever in an area that supports it, but I'm not sure what this menu actually does?