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Unlocked Sprint S5 showing CDMA in GSM/UMTs mode with international SIM card inserted

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.

[Completed] Help! Tmobile Samsung S7 locked only on 1800 mhz band. Already rooted

Hi everyone.
Last time i was in xda forums was when i try to mod my windows mobile CE 5.0 lol
This is my sad story:
I bought in the US a samsung s7 with T-Mobile SM-G930T, i paid a guy who 'unlocked' it in there. After that i brought it to Colombia, in here i run the T-mobile unlock app which succeded and erased itself after that. Then the cellphone started working with all the mobile companies in my country except for one that operates over 1800 mhz, other companies do work fine. When i insert a simcard of this company it just says that 'Not registered in network' and wont do nothing. I already tried to put the APN settings correctly (Actually it automatically loaded every company settings detected).
After that i tried to root with a modded Odin with a custom ROM and it succeeded and i got the SuperSU application, tho the cellphone its a little laggy now, but neither that way it worked. Anyone knows how where should i start looking?
I went to this company support and they sent me to Samsung support, which redirected me back to this company, lol
Thanks in advance guys

XDA Visitor said:
Hi everyone.
Last time i was in xda forums was when i try to mod my windows mobile CE 5.0 lol
This is my sad story:
I bought in the US a samsung s7 with T-Mobile SM-G930T, i paid a guy who 'unlocked' it in there. After that i brought it to Colombia, in here i run the T-mobile unlock app which succeded and erased itself after that. Then the cellphone started working with all the mobile companies in my country except for one that operates over 1800 mhz, other companies do work fine. When i insert a simcard of this company it just says that 'Not registered in network' and wont do nothing. I already tried to put the APN settings correctly (Actually it automatically loaded every company settings detected).
After that i tried to root with a modded Odin with a custom ROM and it succeeded and i got the SuperSU application, tho the cellphone its a little laggy now, but neither that way it worked. Anyone knows how where should i start looking?
I went to this company support and they sent me to Samsung support, which redirected me back to this company, lol
Thanks in advance guys
Click to expand...
Click to collapse
Hi,
It seems your phone is region locked due to which you are locked onto a particular mhz network frequency...
yes the first step would be to try to a custom rom to see if this over rides this situation or you could try below situation below... this is ideally for s6.... or atlast google search...
http://forum.xda-developers.com/verizon-galaxy-s6/general/enabling-using-servicemode-t3109579
Ok, since now we have root, many users wanted to know if they can lock onto certain LTE frequency bands using Samsung's ServiceMode. So here is a quick guide.
ServiceMode is Samsung's proprietary Engineering Mode, built within the TouchWiz framework, readily available on International variants, and some domestic like T-Mobile. It allows us to observe the RF connection, change certain RF related settings, and lock our phones onto specific technologies and frequencies. Sadly, Verizon has been blocking user access to Engineering Mode for years now.
So in order to enable access to ServiceMode on Verizon GS6/Edge you'll need to:
- Download Root Explorer
- Navigate to /efs/carrier/HiddenMenu
- Use TextEdit to open it (not text viewer)
- Change the value to ON (upper case), Save and Exit
- Restart the phone
Once restarted you can dial:
*#0011# to observe the connection
If you want to lock your device onto a specific LTE band (13, 4, 2):
*#27663368378#
- UE Settings & Info
- Settings
- Protocol
- NAS
- Network Control
- Band Selection
- LTE Band Selection
Here you can force your phone onto a specific Verizon LTE Band (13, 4, 2), or use LTE ALL if you have VoLTE (Advanced Calling) enabled as this will eliminate the need for CDMA radios.
To go back to default, go through the same process but at Band Selection make sure to chose AUTOMATIC.
There are a lot more settings here, you can enable AMR WB on UMTS if you use T-Mobile so you can get HD Voice on their UMTS layer, etc... Carrier Aggregation has already been enabled, so no need to tweak that.
If you aren't sure what certain settings and values correspond to, it's better to avoid tinkering. You're responsible for your own actions.

According to this thread, he posted via visitor.
Then he registered and posted his query here so he seems to have posted in correct section.
Just documenting this here.
Thread closed!
Regards
Vatsal,
Forum Moderator.

G955W - LTE / 4G+ Issues in Asia

Got a weird one.
Samsung Galaxy S8 Plus G955W, fully unlocked, stock ROM.
Device works perfectly in North America on all networks. But once in Hong Kong, it won't connect properly to data with LTE enabled. Whatsapp works, minor browsing, but anything google related is slow to the point it's not work. If I force the device on WCDMA / 3G, data is fine.
Same thing with a G930W8 I have. If rooted and running a custom ROM, the G930W8 works fine on LTE / 4G. But if on stock firmware it just won't connect properly. It may work after restart for 10mins but stop after.
Verified APN with the network and it's correct. Any clue as to what is causing this ?

I have the G955W version, I don't have any problems using LTE in HK.

Get in the dialer and input this code
*#2263#
This should get you in the LTE band preferences screen.
Turn on all the bands for all the formats
Go back to the main screen of that menu by selecting the 3 dot selection at the top right of the screen. Once there, select apply configuration.
Hit the home button and reboot phone.
Situation should slowly change.
Depending on network...
Hopefully this helps.

Can you flash ATT, VZW to XAA Branded in Download Mode

Forgive me if this has been covered but I havn't found the answer. I've flashed just about every phone I've ever had but my question here is can I / how do I flash to where the phone reads as XAA in download Mode?
The situation is my phone was originally on at&t. They unlocked it and I'm on Verizon. It all works great (it still says at&t on download Mode screen)
My problem is that if I log into the my Verizon app it disables my visual voicemail. I finally got a Verizon tech on the phone that explained that it is unsupported due to originally being on a different carrier and their system identifies that and disables the VVM. The only fix I can find is to put my sim in my backup S9+ that came from Samsung unlocked (or any Verizon phone) and I can then reactivate my VVM by resubscribing.
I currently have 3 Note 20 Ultras. One Each originally from Samsung, ATT and Verizon but the AT&T is the only one that is 512GB or I would just switch phones. I have flashed them all to U1 firmware but notice they all still reflect the original carrier in Download Mode so again my question is can I change this by flashing it / or is it just a matter of what sim card is in it when it's flashed? I need it to be seen as XAA by Verizon system so not to loose VVM... Pics attached.
Any advice here is greatly appreciated in advance.

Just a try... You can try the *#272*imei# method... But thats If it works. Not sure if the sims has to be in the phone for that to work.

GDHAMTON7 said:
Just a try... You can try the *#272*imei# method... But thats If it works. Not sure if the sims has to be in the phone for that to work.
Click to expand...
Click to collapse
Yes it brings up this menu... So I just select the XAA and that's it? I've been reading forums and this method is reversible it seems ... I'm familiar with Odin and all that but these hidden menus are new to me...
Thanks for the reply btw

You may have to activate the bottom most option to stay.
Don't worry if you can't access the menu after the change. You can download samsung band selection and change to automatic or one of the lte options then back to automatic to get to the menu.

CSC Guide
CSC (which I think means Carrier Service Code) helps to set what options for settings show in the device for things like voicemail and wifi calling, as well as sets network code information for things like carrier aggregation combos.
When you go to your phone settings->about phone->software information and look in the Service Provider SW ver. section, you will see as the last line a combo like XXX/YYY/ZZZ. This indicates what carrier sales and network code is set and what brand the phone was manufactured as.
I think of the XXX/YYY/ZZZ configuration as follows
XXX=Sales Code-What kind of features are setup in the firmware like wifi calling, video calling and settings menus
YYY=Network Code-What kind of network features are set for things like carrier aggregation and LTE/5G bands
ZZZ=Manufactured as Code- What model the phone was originally manufactured as. Ot has no affect on the system settings or options. THIS CAN NOT CHANGE. IT SHOULD ALWAYS BE THE SAME. ONLY A ROOTED PHONE WOULD BE ABLE TO ACCESS THE FILES NECESSARY TO CHANGE THIS.
for more details, refer to post:-
[Guide] Service Mode and CSC Guide/Enable LTE/5G Bands and Services/5G Low Band on U1
Hello All, Many people have asked about service mode and CSC related questions and I thought we should get a discussion going that is all in one place. *DISCLAIMER* I do not take any responsibility for any issues that may occur from changing...
forum.xda-developers.com

Activate 5G network capability on the Velvet

Thanks to paolotheking and this thread about an important secret code for the Velvet and other devices:
LG Velvet Hidden Menu code
Enjoy: #*462633*#900# Works with G900EM
forum.xda-developers.com
I could finally activate the 5G network capability of my phone.
I have a Dutch (NLD) genuine SIM unlocked Velvet LM-G900EM with latest Android 11 v20d-EEA-XX installed.
If you hit with the phone dialpad this sequence:
#*462633*#900#
it will lead you to a hidden menu where you can find all sort of information and tweaking options.
You have to choose "Field Test", then "Modem settings". You will have here many things you can change. Go to "RAT Selection", it will give you many more options than the ones you find under the regular "Network settings".
I tested here first "LTE(5G NSA) Auto" and it instantly made the 5G icon appear in the task bar! So I then hit the "GSM/WCDMA/LTE(5G NSA) Auto" option. I now have up to 5G automatic network selection!
Only issue is that under the regular Network settings, "Preferred network" states now "26" and if I want to see what other options you have, it only lists the options up to 4G preferred and it will go back to 4G maximum. So you have to go through the hidden menu again to activate it.
I also tested that if you power off the phone, 5G maximum stays activated when you power on the phone again, good to know.
You may also try to tweak your 5G bands by selecting them in the corresponding menu "Band Selection" in the "Field Test", "Modem Settings". Some of them might not really work though, as it might be hardware related depending on your model.
Hopefully it can help people finally being able to use the 5G network of their provider with the Velvet, and possibly other LG 5G phones like the V50(S) V60, Wing. You just have to put your model number at the end of the secret code ...#900# for the Velvet, ...#510# for the V50S ...#100# for the Wing, aso, if I understood it good.
Edit: works for the LG Wing too, just tested it!

Vuche said:
Thanks to paolotheking and this thread about an important secret code for the Velvet and other devices:
LG Velvet Hidden Menu code
Enjoy: #*462633*#900# Works with G900EM
forum.xda-developers.com
I could finally activate the 5G network capability of my phone.
I have a Dutch (NLD) genuine SIM unlocked Velvet LM-G900EM with latest Android 11 v20d-EEA-XX installed.
If you hit with the phone dialpad this sequence:
#*462633*#900#
it will lead you to a hidden menu where you can find all sort of information and tweaking options.
You have to choose "Field Test", then "Modem settings". You will have here many things you can change. Go to "RAT Selection", it will give you many more options than the ones you find under the regular "Network settings".
I tested here first "LTE(5G NSA) Auto" and it instantly made the 5G icon appear in the task bar! So I then hit the "GSM/WCDMA/LTE(5G NSA) Auto" option. I now have up to 5G automatic network selection!
Only issue is that under the regular Network settings, "Preferred network" states now "26" and if I want to see what other options you have, it only lists the options up to 4G preferred and it will go back to 4G maximum. So you have to go through the hidden menu again to activate it.
I also tested that if you power off the phone, 5G maximum stays activated when you power on the phone again, good to know.
You may also try to tweak your 5G bands by selecting them in the corresponding menu "Band Selection" in the "Field Test", "Modem Settings". Some of them might not really work though, as it might be hardware related depending on your model.
Hopefully it can help people finally being able to use the 5G network of their provider with the Velvet, and possibly other LG 5G phones like the V50(S) V60, Wing. You just have to put your model number at the end of the secret code ...#900# for the Velvet, ...#510# for the V50S ...#100# for the Wing, aso, if I understood it good.
Edit: works for the LG Wing too, just tested it!
Click to expand...
Click to collapse
Where U buy this velvet LM-G900EM Unlocked.I need One.Am From India.I Searched eBay & amazon but this specific model not available There.