Develop Bugs

2G mode and 3G mode only

I've noticed in the menu options, there is an option to keep the phone in 2G mode only. On the other hand, is there any way to keep the phone in 3G / 3.5 / 4G mode? Any software that can do this?

hkalltheway said:
I've noticed in the menu options, there is an option to keep the phone in 2G mode only. On the other hand, is there any way to keep the phone in 3G / 3.5 / 4G mode? Any software that can do this?
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The phone will only switch to 2G if faster speeds are not available. The 2G mode option allows you to prevent the phone from switching to faster (and more battery consuming) data connections....

From the dialer, you can type in *#*#4636#*#* to bring up some "secret" settings. From there you can configure your phone to only use 3G.
Sent from my Galaxy Nexus using Tapatalk

NPuter said:
The phone will only switch to 2G if faster speeds are not available. The 2G mode option allows you to prevent the phone from switching to faster (and more battery consuming) data connections....
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How about if I don't want 2G at all and want it to stay 3G only, even if there is no signal? I remember this option on the SGS 2..

hkalltheway said:
How about if I don't want 2G at all and want it to stay 3G only, even if there is no signal? I remember this option on the SGS 2..
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Click to collapse
You do what chrono just said and the hidden menu let's you force 3g only. *#*#4636#*#* on the dial pad.

RogerPodacter said:
You do what chrono just said and the hidden menu let's you force 3g only. *#*#4636#*#* on the dial pad.
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Click to collapse
Doesn't stick all the time for some reason. Same with atrix. And other phones.
Sent from my Galaxy Nexus using xda premium

Chrono_Tata said:
From the dialer, you can type in *#*#4636#*#* to bring up some "secret" settings. From there you can configure your phone to only use 3G.
Sent from my Galaxy Nexus using Tapatalk
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What setting to change? I see phone information, battery information, etc..but no settings..any help please? Thanks!

hkalltheway said:
What setting to change? I see phone information, battery information, etc..but no settings..any help please? Thanks!
Click to expand...
Click to collapse
Go into phone info. From there if you scroll down a bit you will see a text that says something like "GSM/CDMA auto". Press that and you should get a drop down menu. Change the setting to "CDMA only". That should work.
Sent from my Galaxy Nexus using Tapatalk

Chrono_Tata said:
Go into phone info. From there if you scroll down a bit you will see a text that says something like "GSM/CDMA auto". Press that and you should get a drop down menu. Change the setting to "CDMA only". That should work.
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Click to collapse
Not sure how that disables 2G (1xRTT). Unless I'm mistaken, both 1xRTT (2G) and EVDO (3G) run on top of CDMA.
Also, you can get to this from settings->wireless & networks->More...->Mobile Networks->Network Mode
There you can select LTE/CDMA or CDMA.
And it always sticks

Mobile Network mode GSM/CDMA confusion *#*#4636#*#*

Entering in the "secret" menu *#*#4636#*#*, i noticed that the default network mode is GSM/CDMA auto (PRL)
Aren't two completely different networks (and phone)? Or what that CDMA setting is referring?
Since my GNext is GSM and in my country there is no CDMA network operators, is that the best option regarding the battery life?
I remember that in my previous htc desire, the default network mode was WCDMA preferred (WCDMA different from CDMA), even if i was using GSM auto (PRL) which mean that if the 3g is low it will use the 2g network...and i remember there was nothing about CDMA network
So my doubt is why the Galaxy Nexus GSM doesn't have GSM auto (PRL) or WCDMA preferred as default option? is that a bug?
here a reference about the network mode http://www.google.ie/support/forum/p/android/thread?tid=6a327a95211ac789&hl=en
GSM = GPRS (2g), EDGE(2g), UMTS(3g), WCDMA(3g), HSDPA(3g) {Cell Carrier examples: AT&T and T-Mobile}
CDMA = CDMA*(2/3g) EV-DO(3g) WiMax(3/4g) {Cell Carrier examples: Verizon and Sprint}
Now that the general stuff is out of the way, here's my take on the Preferred Network types:
WCDMA preferred - The GSM phone is capable of using both 2G and 3G data communication and when signal strength is low 3G is favored more.
GSM only - The GSM phone is capable of using only 2G data communication. When the 2G signal is too low you get nothing at all.
WCDMA only - The GSM phone is capable of using only 3G data communication. When the 3G signal is too low you get nothing at all.
GSM auto (PRL) - The GSM phone is capable of using both 2G and 3G data communication and when signal strength is low 2G is favored more. This one is a bit confusing to me since PRL is associated mostly with CDMA technology and not GSM technology.
CDMA auto (PRL) - The CDMA phone is capable of using both 2G and 3G data communication and when signal strength is low 2G is favored more.
CDMA only - The CDMA phone is capable of using only 2G data communication. When the 2G signal is too low you get nothing at all.
EvDo only - The CDMA phone is capable of using only 3G data communication. When the 3G signal is too low you get nothing at all.
GSM/CDMA auto (PRL) - Some phones are equipped with both GSM and CDMA capabilities. This setting appears to just have the phone attempt to stay connected to the data communication type that works the best.
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Click to collapse
In addition seems there is no way to change the network mode in that menu on my gnext, the option i choice doesn't stick

andQlimax said:
Entering in the "secret" menu *#*#4636#*#*, i noticed that the default network mode is GSM/CDMA auto (PRL)
Aren't two completely different networks (and phone)? Or what that CDMA setting is referring?
Since my GNext is GSM and in my country there is no CDMA network operators, is that the best option regarding the battery life?
I remember that in my previous htc desire, the default network mode was WCDMA preferred (WCDMA different from CDMA), even if i was using GSM auto (PRL) which mean that if the 3g is low it will use the 2g network...and i remember there was nothing about CDMA network
So my doubt is why the Galaxy Nexus GSM doesn't have GSM auto (PRL) or WCDMA preferred as default option? is that a bug?
here a reference about the network mode http://www.google.ie/support/forum/p/android/thread?tid=6a327a95211ac789&hl=en
In addition seems there is no way to change the network mode in that menu on my gnext, the option i choice doesn't stick
Click to expand...
Click to collapse
Id like to know why the options dont stick as well... Just seems stupid to me that they dont stay after you choose them.

I have also been wondering the same thing. On the Nexus One and Nexus S it would default to WCDMA prefered and if I were to force 3G on it then it would stick on a reboot. On the GN if I put it to WCDMA only or GSM only it will revert to the GSM/CDMA auto (PRL) network type. It did this on stock 4.0.2 and it's also doing it on CM9.

In that menu there is something about LTE ram dump too. Is there a little more ram the LTE guys are getting that's hidden on GSM?
Sent from my Galaxy Nexus using Tapatalk

GSM auto (PRL) won't stick but WCDMA did for me but I REALLY regret changing it. It caused my SMSC number to change to 00 and I couldn't change it back on my GNex. It took me a while to figure out that the SMSC had changed and it stopped me from sending text messages but I could still receive them. After wiping and flashing a few times I realised and I put the sim card into an old phone and changed the SMSC back and put it back in my GNex and it let me send texts again.

3bs11 said:
GSM auto (PRL) won't stick but WCDMA did for me but I REALLY regret changing it. It caused my SMSC number to change to 00 and I couldn't change it back on my GNex. It took me a while to figure out that the SMSC had changed and it stopped me from sending text messages but I could still receive them. After wiping and flashing a few times I realised and I put the sim card into an old phone and changed the SMSC back and put it back in my GNex and it let me send texts again.
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I am going to eat my own words but iv just done the same thing, can't send SMS. I don't have an old phone to put my sim in. I'm not sure what my SMSC was to change it back. Ideas?
Sent from my Galaxy Nexus using Tapatalk

The Gingerbread Man said:
I am going to eat my own words but iv just done the same thing, can't send SMS. I don't have an old phone to put my sim in. I'm not sure what my SMSC was to change it back. Ideas?
Sent from my Galaxy Nexus using Tapatalk
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God it was a nightmare yesterday. I did a google search and found the number on vodafone forums for my country. What's your carrier? Even if you have the number maybe you won't be able to put it on your nexus like me but you can try. Another possible solution might be to get a new sim card but I'm not sure if that'll work. I just read it online.
Sent from my Galaxy Nexus using Tapatalk

The Gingerbread Man said:
I am going to eat my own words but iv just done the same thing, can't send SMS. I don't have an old phone to put my sim in. I'm not sure what my SMSC was to change it back. Ideas?
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
OK try +44-7973100973 for orange uk
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Thanks shall give it a try!
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The Gingerbread Man said:
Thanks shall give it a try!
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Click to collapse
Good luck. Let me know if it works or not.

3bs11 said:
Good luck. Let me know if it works or not.
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Click to collapse
Apparently not. The annoying thing is there is thing OEM specific carrier info button which is greyed out, I bet that would sort out my settings.
Sent from my Galaxy Nexus using Tapatalk

The Gingerbread Man said:
Apparently not. The annoying thing is there is thing OEM specific carrier info button which is greyed out, I bet that would sort out my settings.
Sent from my Galaxy Nexus using Tapatalk
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Click to collapse
Mine is greyed out too so maybe that doesn't change anything in this case. I guess your best bet is trying to put the sim card into another phone and set the SMSC number on that phone then plug it back into your GNex. I used an old blackberry

3bs11 said:
Mine is greyed out too so maybe that doesn't change anything in this case. I guess your best bet is trying to put the sim card into another phone and set the SMSC number on that phone then plug it back into your GNex. I used an old blackberry
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Yeah, might be borrowing my mums Nokia at this rate lol Did you find if you tried to copy and paste numbers into the smsc area it caused a force close for 'phone'?
I did come across http://smsclist.com/downloads/default.txt which looks pretty handy to have around
Sent from my Galaxy Nexus using Tapatalk

The Gingerbread Man said:
Yeah, might be borrowing my mums Nokia at this rate lol Did you find if you tried to copy and paste numbers into the smsc area it caused a force close for 'phone'?
I did come across http://smsclist.com/downloads/default.txt which looks pretty handy to have around
Sent from my Galaxy Nexus using Tapatalk
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Click to collapse
Force close for phone as in the app?

3bs11 said:
Force close for phone as in the app?
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Click to collapse
Yeah haha I'm sorted now anyway thanks for your help, I can finally send messages again but had to set the message centre on my mums phone lol I'm relieved!
Sent from my Galaxy Nexus using Tapatalk

The Gingerbread Man said:
Yeah haha I'm sorted now anyway thanks for your help, I can finally send messages again but had to set the message centre on my mums phone lol I'm relieved!
Sent from my Galaxy Nexus using Tapatalk
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Click to collapse
Glad to see it worked. I actually went back to stock and rooted again and flashed AOKP and all that just to fix this and then realised all that wasn't necessary lol. I wonder if everyone switching to WCDMA only is having this issue or just us?

3bs11 said:
Glad to see it worked. I actually went back to stock and rooted again and flashed AOKP and all that just to fix this and then realised all that wasn't necessary lol. I wonder if everyone switching to WCDMA only is having this issue or just us?
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Click to collapse
Gutted! Mine doesnt want to stick with WCDMA but I'm happier with my phone fully working again. I hope no one else gets this and I'm grateful for your help. I never had this particular problem before and I'm glad I know how to sort it next time if needs be
Sent from my Galaxy Nexus using Tapatalk

SMSC update
for refenrece about the above problem updating the SMSC i found this link
http://community.windmobile.ca/windmobile/topics/nexus_s_smsc_advanced_menu_options
its for the nexus s, but it works also on our galaxy nexus
so basically with our nexus (also other samsung i guess) through the advanced menu *#*#4636#*#*, u can update the SMSC only putting the encoded value like described in the link above
also the important things are the 2 buttons near the SMSC field:
- the first on the left (nearest the field) mean refresh: basically should load ur actual SMSC (sometimes don't work)
- the second on the right (far from the filed) mean update: so it change ur SMCS with the actual value on the field..so be carefully if the field is empty
(in my language the translation of those button are wrong, and both have the same label..thats why im explaining it )
anyway i suggest to don't play with the *#*#4636#*#* menu at all, unless u have problems
hope this helps some future users

I need help. Im in the US on AT&T. Im having the same problem sending sms. I can receive them but just cant send them. I think i messed up my smsc. Messing around with*#*#4636#*#*.I dont know what to do. Im running stock rom. Can somebody help me and tell what number need to put in. Im kinda lost. Gsm galaxy nexus in the use on ATT

Geng ....

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#

enabling 2100 mhz band

i have a uvbm1 radio.
i used the *#2263# code to enable the 2100 wcdma frequency
i pressed add band preference -->than wcdma 2100 but nothing happens.
how can i enable this frequency?
thanks

Hey how'd you even get into that menu? What ROM are you on? I'm asking cuz I've been trying to get into the band adding menu for a long time... And also I've tried that cod win the dialer it does nothing. I'm on slimbean latest 4.2.2

username2013 said:
Hey how'd you even get into that menu? What ROM are you on? I'm asking cuz I've been trying to get into the band adding menu for a long time... And also I've tried that cod win the dialer it does nothing. I'm on slimbean latest 4.2.2
Click to expand...
Click to collapse
Those codes are disabled on ALL aosp based ROMs
Sent from my SGH-T989 using xda app-developers app

yeah. i used the whitehawk's aokp for about a month, and only replaced it with the new uvmc6 jellybeast so that i can enable the 2100 freq.

I'm running Jedi Jelly with newest radio. But when I dial that code all I get is a black screen that says service on the top...
Sent from my SAMSUNG-SGH-T989 using xda premium

Make sure that option wasn't added to a menu instead. CM10.1 (4.2.2) has it under Wireless & Networks -> Mobile Networks -> Network Mode and you can set "WCDMA Preferred" right out of the box. Your ROM may vary, but it's something to try.

maybe the modem i installed doesnt support wcdma 2100?

Figure it out?
Did anyone figure this one out?
I am from USA
but visiting Asia right now and I cannot get 3G to work for the life of me.
I've determined the 2100 MHz band is not enabled on this phone.

gigaflop said:
Did anyone figure this one out?
I am from USA
but visiting Asia right now and I cannot get 3G to work for the life of me.
I've determined the 2100 MHz band is not enabled on this phone.
Click to expand...
Click to collapse
im pretty sure wcdma only works with 4g networks on t989
not sure why hes using uvmb1, blaze radio

[Q] How turn on only lte?

How turn on only lte on t805? Thanks for attention

crzcraft said:
How turn on only lte on t805? Thanks for attention
Click to expand...
Click to collapse
Think you have to be rooted. Install the app Advanced Signal Status and under "additional info", then "device info" you can choose for different options.

crzcraft said:
How turn on only lte on t805? Thanks for attention
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Click to collapse
when I am using my galaxy note 3, I input *#2263# to go to a menu where I can force LTE/WCMA my device and mostly it connects to only LTE.
in the Galaxy tab S , the code works but the option for LTE only is missing. so now I continuously connect to a slow 3g network.. bummer...
*UPDATE:
apparently you have to deselect all GSM bands and just select all LTE and WCMA bands.. you wont be able to use GSM bands but your device will lock on to LTE connections if avaialbe, 3g will apply if LTE is unavailable. hope this helps