Saw this on the AT&T forums, not sure if it works though.
Originally Posted by BecomingxInsane
I found out that if you go into the dialer and type in *#*#197328640#*#* that it will take you into a menu that will allow you to change it. From the main menu of the ServiceMode screen, select DEBUG SCREEN, then PHONE CONTROL at the bottom, then UE STATE CONTROL. From there select CHANGE RAT TO WCDMA to enable 3G only, and select CHANGE RAT TO GSM for 2G only.
this doesnt do anything at all .
i live in an area with no 3g coverage.. despite att sending me emails stating its be "coming" since last summer. anyways...
I set the phone to 3g only mode and I still get signal
The thunderbolt had this and it was nice.
Basically when I'm at work I'm in a fringe 4g area. If I leave the phone in 3g/4g auto mode then it constantly switches between the two and it destroys my battery. Not only that but it makes 4g basically unusable for me as it never stays on long enough to do anything with it.
On the thunderbolt by going into the phone info settings you could select LTE only mode.
On the Charge you only have the options of going CDMA only or CDMA/LTE auto. There is no LTE only option.
Is this something that can be corrected by an app or rom or kernel or is it built into the radio software?
I used the phone info app that worked great on the thunderbolt and on the charge it just comes up with a bunch of options like WCDMA only, GSM only and such and as far as I can tell none of them actually do anything.
Hopefully someone knows the answer to this because I like tethering to my tablets at work but if I can't have consistent 4g then I'm gonna be forced to return to my tbolt which is a shame because I like this charge alot better.
I haven't pucked up a Charge yet, but most Sammy phones let you for some fine grain tuning if the radio and other system settings via a menu accessed by a dialer code.
You could try *#*#197328640#*#* (is debug mode) and dig in from there.
Sent from Thunderbolt
distortedloop said:
I haven't pucked up a Charge yet, but most Sammy phones let you for some fine grain tuning if the radio and other system settings via a menu accessed by a dialer code.
You could try *#*#197328640#*#* (is debug mode) and dig in from there.
Sent from Thunderbolt
Click to expand...
Click to collapse
Already tried that, it doesn't work on the charge. It just dials and you get the "Welcome to Verizon wireless, your call cannot be completed as dialed" message.
I believe if you go settings ->wireless and network->mobile networks->system selection change it to CDMA mode will disable LTE.
you can try dialing "*#*#4636#*#*" that takes me to a hidden menu on the thunderbolt. If it works, from that menu select "phone Information" then select LTE only. or if you want to disable 4g (Helps battery in non 4g areas) you can select "CDMA auto(prl)"
thetwiztidfreak said:
you can try dialing "*#*#4636#*#*" that takes me to a hidden menu on the thunderbolt. If it works, from that menu select "phone Information" then select LTE only. or if you want to disable 4g (Helps battery in non 4g areas) you can select "CDMA auto(prl)"
Click to expand...
Click to collapse
Beat me to it
Sent from my ADR6400L using XDA Premium App
Thanks but did you guys even read my original post?
For starters, I'm not trying to disable LTE... I'm trying to force LTE only.
Secondly, as I previously said, This phone does not have the same radio options that the thunderbolt does. There is no option for LTE only. I understand the difference between CDMA auto PRL, CDMA/LTE auto and LTE only. THE PROBLEM IS THIS PHONE DOES NOT HAVE AN LTE ONLY OPTION!
I tried the phone info app that works on the thunderbolt, the only options are all for WCDMA only, GSM only and CDMA only and various combinations of them. There is no LTE only. Besides, none of the options present in that menu actually change anything, only the 2 that are built into the wireless network settings do (CDMA only and CDMA/LTE Auto).
Not trying to be a **** but if you're gonna post something to try and answer a question or help someone at least make sure you read the question.
In the same boat as you. I actually get decent service on LTE at home, and virtually nothing on 3G... go figure, but it keeps trying.
navycow said:
In the same boat as you. I actually get decent service on LTE at home, and virtually nothing on 3G... go figure, but it keeps trying.
Click to expand...
Click to collapse
i have the same problem as both you guys and this is so frustrating. when its connected to 4g i get between 8-10mb down. i also have a samsung mifi hotspot for verizon and it shows a strong 4g signal and gets over 10mb down consistently in the very same location.
i have no idea why my droid charge keeps switching between 4g and 3g. the funny thing is the only reason i really mind is because the 3g signal is horrible. if i was getting 2mb down on the 3g like i have seen at other locations i wouldnt mind at all.
yeah i have the same issue as well, i'm really not even sure what it's testing to decide to switch from 4g to 3g, i live about 100 yards from the verizon tower i'm connecting to and have full reception on both 4g and 3g but yet it still switches randomly between the 2, we really need a way to disable 3g
Sent from my Xoom using XDA Premium App
Still nothing on this front? I'm afraid I'm gonna have to return my charge tomorrow then =(
No LTE only mode = no 4g for me.
I already did and canceled Verizon, I'll have to stick with sprint. I really loved the charge, and wanted to keep it and stay with Verizon , but my evo gets a full 4g signal both at home and work. Too bad, the charge was an awesome phone
Sent from my SPH-D700 using XDA App
It actually seems to be the way android handles 4G, either on purpose or just coincidentally.
I have the same issue at work with Sprint, 4G gives me 2-3 bars but there is NO 3G, but it turns 4G off when the screen is locked, so it sits there trying to get backups in 3G all day, spare parts lets you force wifi to stay on, surely there should be a similar switch for 4G a dev could find.
Any luck on this issue here? I have a feeling I'm in a fringe area where it could potentially switch me between networks quite often...
Is it safe to assume that an LTE-only option is impossible unless Samsung does something to enable this functionality out of their LTE chip (CMC220)?
Any updates on a LTE/4G only option?
I found out how to force LTE Only ...
Warning! If this bonks up your phone, don't blame me!
Use at your own risk!
Now that we got that out of the way, here is what I have found:
Enable the Hidden Menu option by entering the following code in your phone dialer: *#22745927
Enter an SPC of: 000000
Select: Hiddenmenu Enable
Select: OK (Your phone may reset after this)
To get to the "Force CMDA/LTE/Global" menu, enter the following code in your phone dialer: **583
If you press the LTE button, you will be fixed on the LTE network.
Reset your phone
Taaa-daa!
Note: You apparently need connectivity to the CDMA network to make phone calls & text messages (Thanks, chaoscentral!) Oh, well ...
To reset back to the normal LTE/CDMA automatic selection mode:
Go to the "Force CMDA/LTE/Global" menu by enter the following code in your phone dialer: **583
Press the CDMA button, which will re-enable your phone to default to the CDMA network.
Reset your phone
When your phone boots back up, go to: Settings >> Wireless & network >> Mobile networks >> System selection >> LTE automatic
Cheers!
just keep in mind LTE only mode means no phone calls or text messages. since those go over CDMA
Ah, I should've guessed they would make the phone code for this hidden menu option "LTE". Now I wish there was a way to only disable EV-DO 3G (leaving CDMA intact for phone calls/texts). Can't have it all I guess...
Thanks for this regardless!
PeterDLai said:
Ah, I should've guessed they would make the phone code for this hidden menu option "LTE". Now I wish there was a way to only disable EV-DO 3G (leaving CDMA intact for phone calls/texts). Can't have it all I guess...
Thanks for this regardless!
Click to expand...
Click to collapse
Yep. I tried goofing around with a few different options on the "LTE" theme, but nothing came up.
Then, I realized that I had loaded new ROMs since the last time I had enabled the Hidden Menus option, and figured out that my Hidden Menus were no longer enabled. Once I re-enabled the hidden menus, I tried *#LTE#* (which didn't work), and then **LTE, which did.
BTW, for anyone that has had problems making phone calls after following my original settings, I have updated the post on to how to get back to automatic LTE/CDMA.
Also, has anyone tried that **583 "Global" option yet? Verrrry Interesting!! (But, spooky!)**
Ain't messin' with your phone fun?
** Anyone who gets this reference wins one "Bippy".
Good afternoon,
(ROGERS only) Thx to redpoint73 for pointing it out.
I've been seeing a lot of people wondering if LTE can be toggled off. In fact you can do it manually within the service menu.
To access the Service Menu from your HOX go to your dialer press
*#*#4636#*#*
This will bring up a selection of 4 choices. The one that were interested in is the first one called "Phone information", select it.
If you scroll down gently and go to the section called "Set Preferred network type" this will allow you to select the network type you want. In this case it should currently be set to "GSM/WCDMA/LTE Auto" which enabled the LTE by default. Since I wanted to simply be on the most available Network (4G) I selected WCDMA preferred.
There you have it I've now toggle LTE off entirely.
Cheers!
It should be noted that this only works on the Rogers version. AT&T has their One X locked to "auto".
redpoint73 said:
It should be noted that this only works on the Rogers version. AT&T has their One X locked to "auto".
Click to expand...
Click to collapse
I unlocked my AT&T One X, and it appears I now have the ability to select which band. I have a T-Mobile sim in it now, and when I selected "LTE Only", I don't get service and can't make calls(obviously).
Using this post as a guide
http://forum.xda-developers.com/showthread.php?p=41136607
I found a way to turn off LTE in the samsung modem software (dialer code *#0011#)
Steps:
Open dialer
Type *#0011#
Menu
Back
Menu
Key input
Type 1 in box
Ok
Menu
Back
1 UMTS
1 Debug
6 Phone Control
6 Network Lock
4 RAT_FREE_SUPPORTING_ON
menu
Back
Menu
Back
7 Network Control
2 Band Selection
From here choose your band. I recommend WCDMA/GSM Mode Only
I dont have LTE here so I cant confirm it works, but I know it does not stick on reboot.
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
_Dennis_ said:
Using this post as a guide
http://forum.xda-developers.com/showthread.php?p=41136607
I found a way to turn off LTE in the samsung modem software (dialer code *#0011#)
Steps:
Open dialer
Type *#0011#
Menu
Back
Menu
Key input
Type 1 in box
Ok
Menu
Back
1 UMTS
1 Debug
6 Phone Control
6 Network Lock
4 RAT_FREE_SUPPORTING_ON
menu
Back
Menu
Back
7 Network Control
2 Band Selection
From here choose your band. I recommend WCDMA/GSM Mode Only
I dont have LTE here so I cant confirm it works, but I know it does not stick on reboot.
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
Click to expand...
Click to collapse
Yeah, this has already been discussed. All you have to do is dial *#*#4636*#*# and then choose device information and select your preferred network mode. They didn't rat lock this modem which is surprising.
MattMJB0188 said:
Yeah, this has already been discussed. All you have to do is dial *#*#4636*#*# and then choose device information and select your preferred network mode. They didn't rat lock this modem which is surprising.
Click to expand...
Click to collapse
They did as is evidence by dialing *#2263#
Also I have found *#*#4636*#*# not to stick after exiting the screen (could have been just me or a mistake I made)
Edit: seems my *#*#4636*#*# stuck until reboot. Nevermind then. I am still looking to see if I can get this crap to stick on reboot
The method I outlined sticks until reboot. And rat is unlocked until reboot. (Im looking at other options to write the modem so it sticks on reboot, but im blindly playing with it mostly)
Sent from my SAMSUNG-SGH-I337 using Tapatalk 2
I have a friend using a Sprint Samsung Galaxy S5 that was recently SIM unlocked for international use. We also have a SIM card (egsimcard.co.kr) which has worked for me 4 times in the past year, across various phones. The 3G network (which runs on KT/Olleh) is UMTS 2100, which should work with the SM-G900P (at least according to willmyphonework.net).
We confirmed that the phone said "invalid SIM card" before the unlock, and there is no such message after the unlock. However, the About Phone screens still show the phone number associated with the CDMA profile of the device, even after we switch the phone to GSM/UMTS mode and reboot. It's like we can't make actually make it work in GSM/UMTS mode.
Does anyone have any advice to make this work?
(She is in South Korea now and needs help ASAP, currently renting a phone and wifi hotspot, but would prefer not to.)
We also tried setting the APN and manually searching for the network, but it's all theoretically moot if the phone isn't picking up the phone number on the SIM.
We've even tried the Phone Info menu at *#*#INFO#*#* but there's no access to that running stock ROM.
shoot, i totally missed this post. i always seem to miss the time sensitive ones. Anyways did you go into more networks/mobile networks/network operators and register on the gsm network? you might have to go into the GCF settings on the phone to allow for GSM connections, this can be done with the following steps
Dial *#0011# and in the service menu do the following
Click (menu) then (key input) then input Q then (Ok)
Click (menu) then (back)
Click (menu) then (key input) then input 0000 then click (Ok)
Wait for about 15 seconds then a menu will pop up, from there follow these procedures:
[2] UE Setting & Info >
[1] Setting >
[1] Protocol >
[4] GCF >
[1] GSM/(E)GPRS/WCDMA GCF ON
It will say "success", please reboot via the phone’s power menu after the confirmation.