Develop Bugs

[Q] Diagnostics settings

The T-Mobile G2 has *#*#4636#*#* to enter the diagnostics function.
Would there be anyone out there that could give me the best (performance) settting options that I should select with my G2 when in the diagnostic mode? Thanks in advance!
Aloha From Hawaii

I mostly use WCDMA only. You also can downlaod AnyCut from the market and load the shortcut PHONE INFO and it will do the same thing as dialing those numbers
Sent from my T-Mobile G2 using XDA App

Also too, why do I use WCDMA only is for it only looks for HSPA+. That way if I'm say in walmart it does not go back and forth on HSPA+ and Edge all the time. If its not 100% HSPA+ than my cell won't connect and waste that little bit of battery roaming
Sent from my T-Mobile G2 using XDA App

If you're in a city with good HSPA or 3G coverage, use WCDMA preferred. If you're in a city with spotty 3G/HSPA coverage, use GSM auto (PRL). The first will connect to 3G/HSPA if at all possible. The second option needs to reach a higher signal threshold before it switches to 3G/HSPA. I've tested both.

bobolinko said:
The T-Mobile G2 has *#*#4636#*#* to enter the diagnostics function.
Would there be anyone out there that could give me the best (performance) settting options that I should select with my G2 when in the diagnostic mode? Thanks in advance!
Aloha From Hawaii
Click to expand...
Click to collapse
I know this is a newb question but what does it mean when you see all of those numbers and symbols? Is it a number to call or text? I want to know because I say it under the OTA post in order to "Check In" but I have no idea what it means or how to use it.

Its basiclly a code to get into phone information on your cell
Sent from my T-Mobile G2 using XDA App

vcof2005 said:
I know this is a newb question but what does it mean when you see all of those numbers and symbols? Is it a number to call or text? I want to know because I say it under the OTA post in order to "Check In" but I have no idea what it means or how to use it.
Click to expand...
Click to collapse
You enter it just like a phone call, then it will present the Phone Info menus to you. To checkin, it's the same sort of thing, just dial *#*#2432546#*#*
Hope that helps.

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?
Click to expand...
Click to collapse
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....
Click to expand...
Click to collapse
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..
Click to expand...
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.
Click to expand...
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
Click to expand...
Click to collapse
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.
Click to expand...
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

[Q] Roaming

Is there any way to force roaming without root?

I haven't found a way to force roaming with root, let alone without. Not even manually update the prl.. I miss my evo3d with corporate prl and roam control
Sent from my LG-LS970 using xda premium

Yeah is there any way we can? I definitely need that in one location
Sent from my LG-LS970 using Tapatalk 2

With root roam control should work. It will only be 1x until we can load a corporate prl though.
Sent from my LG-LS970 using Tapatalk

The website said LG phones aren't supported though?
Sent from my LG-LS970 using Tapatalk 2

http://forum.xda-developers.com/showthread.php?t=1880781
Every Sprint PRL
Do you guys think we can use this method on our LGOG also?
Sent from my LG-LS970 using xda app-developers app

megamaster2 said:
The website said LG phones aren't supported though?
Sent from my LG-LS970 using Tapatalk 2
Click to expand...
Click to collapse
This is my first lg.. didn't know that.

I'm not savvy enough to try it but someday perhaps. As of now I think if we just request it from the roam control developers they may try
Sent from my LG-LS970 using Tapatalk 2

Any ideas? I've even tried Roam Control (root), but it doesn't work. I've also tried using the Optimus S (LS670) hack, but no dice either,
Update: Also tried looking at the Hidden Menu from here, nothing that jumps out as far as roaming.

So I think I stumbled onto something, thanks to this 2010 page. I found this because I was getting tired of getting no signal while my coworker (Verizon) had 3 bars at a conference room.
By following the steps below, you acknowledge that you do this at your own risk, don't abuse or Sprint may get mad, YMMV, all your base, etc...
To try to force roam
1. Go into the hidden menu by "dialing" 3845#*970# (from this thread)
2. Scroll all the way to the bottom, go to "IOT Hidden Menu"
3. "CDMA Setting" -> "CDMA Preference"
4. Under "Band Setting", choose "Cell Only". From the initial link (July 2010):
this forces only 800mhz CDMA, which is typically NOT Sprint, though if you are in a rare area where Sprint has 800mhz, it will lock you onto the 800mhz band, which can traverse better than the 1900mhz PCS band. In most areas you will notice it switch to roaming.
Click to expand...
Click to collapse
To change it back to the original settings,
1. Go into the hidden menu by "dialing" 3845#*970# (from this thread)
2. Scroll all the way to the bottom, go to "IOT Hidden Menu"
3. "CDMA Setting" -> "CDMA Preference"
4. Under "Band Setting", choose "Any" (default value).

roguejam said:
So I think I stumbled onto something, thanks to this 2010 page. I found this because I was getting tired of getting no signal while my coworker (Verizon) had 3 bars at a conference room.
By following the steps below, you acknowledge that you do this at your own risk, don't abuse or Sprint may get mad, YMMV, all your base, etc...
To try to force roam
1. Go into the hidden menu by "dialing" 3845#*970# (from this thread)
2. Scroll all the way to the bottom, go to "IOT Hidden Menu"
3. "CDMA Setting" -> "CDMA Preference"
4. Under "Band Setting", choose "Cell Only". From the initial link (July 2010):
To change it back to the original settings,
1. Go into the hidden menu by "dialing" 3845#*970# (from this thread)
2. Scroll all the way to the bottom, go to "IOT Hidden Menu"
3. "CDMA Setting" -> "CDMA Preference"
4. Under "Band Setting", choose "Any" (default value).
Click to expand...
Click to collapse
So I did what you said and it worked well! I was roaming. I went back and now I have no data connection. :/ Help?! Anyone.

megamaster2 said:
So I did what you said and it worked well! I was roaming. I went back and now I have no data connection. :/ Help?! Anyone.
Click to expand...
Click to collapse
same here. I loose data with this roaming method.
Edit. never mind. i have my 3g back eventho it is ****ty slow. but i can still force cell network with this method. thx!
Sent from my LG-LS970 using xda app-developers app

Tmobile S4 on AT&T cannot connect to LTE help!

Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!

qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
are you using stock ROM?

Rattles said:
are you using stock ROM?
Click to expand...
Click to collapse
Yes I am, I guess I should've mentioned that

Apparently my data stopped working now too. No data at all

qidrox said:
Apparently my data stopped working now too. No data at all
Click to expand...
Click to collapse
Ok so after changing some options around in network i have 4G back up and running. Its on WCDMA/GSM now.

Did you check the apn to make sure its correct for att?
Sent from my SGH-M919 using xda premium

qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2

Soldier 2.0 said:
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2
Click to expand...
Click to collapse
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?

Yeaaaayuh!
qidrox said:
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?
Click to expand...
Click to collapse
Figured it out!!! Did a google search and noticed my APN values were wayyy off. Changed them. BAM LTE!! :laugh::good:
Thanks to all that helped!

Share those setting to help others !!!!!!!!

nmccready said:
Share those setting to help others !!!!!!!!
Click to expand...
Click to collapse
Go to settings> more networks>mobile networks> access point network> and change your settings to look like these....
In the "APNs" window just hit the + button to creat a new APN
Sent from my SGH-M919 using XDA Premium 4 mobile app

Thank you!
I also found the setting from here:
https://www.youtube.com/watch?v=gMyD8zqk-Hg which led to here: http://forum.xda-developers.com/showthread.php?t=2336085 .
The main end game fix was that ATT had my IMIE # incorrectly set. Once they fixed that my LTE was a go!
:good: :laugh:

How to switch 3G Only

How I can switch my Fire Phone to 3G Only Band? Some App or somthing? Who help? :what:

Go to the dialer, enter *#*#4636#*#* and tap "Phone Information". On the next screen, you can select 'WCDMA preferred' from the drop-down menu. However, I'm not sure if the phone will automatically reset itself back after a restart or whatnot.

Yes. I discovery that. Its simple and easy. Now for me, a very good phone.

Is there anyway to turn off 3G ? for use 2G GSM only mode , I want to use EDGE option since my area has the weak 3G signal.

ease_the_pain said:
Is there anyway to turn off 3G ? for use 2G GSM only mode , I want to use EDGE option since my area has the weak 3G signal.
Click to expand...
Click to collapse
You follow the same steps I gave in my previous post. Instead of selecting WCDMA preferred, you select GSM only in the drop-down menu.

ged92781 said:
You follow the same steps I gave in my previous post. Instead of selecting WCDMA preferred, you select GSM only in the drop-down menu.
Click to expand...
Click to collapse
Thank you it works great without reset the phone.

And easier and lazier way is to install the app "Phone testing", it is the shortcut to the same menu. On Motorola phone the app is required because that dialer combination doesn't work.