How does the third-party app know the phone is on 5G? - Samsung Galaxy S10 Questions & Answers

(My very first post, very sorry if this is the wrong place to ask this question.)
I am trying to write an app to support 5G-specific function, but cannot figure out how to detect the phone is on a 5G network. Android Q added a new network type, NETWORK_TYPE_NR, but it is not available in Android Pie. The just-released Samsung S10 5G is running in Android Pie yet has fully supported 5G function. It also has a 5G icon to indicate whether the phone is on 5G or not.
So how does it do that? Is it possible for the third party-app to know whether the phone is on 5G or not?
Any help (or tip, hint et al) is appreciated! I looked at the Android open source code but there is no mention on 5G on the Pie branch.

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S10 5G android 10?

After looking at the list of devices that is scheduled to receive the android 10 update, I can't help but notice that the 5G isn't actually listed in that long list of devices. Is this meaning that the 5G will not receive android 10?

How to upgrade firmware for S10 5G G977N when not in Korea?

I got a new in box S10 5G that seems unlocked but can't seem to make voice calls with Rakuten Mobile in Japan. I'd seen other Japanese users have such issue with other Android devices and could resolve it by activating VoLTE but no such options seems to exist on the S10 5G as I have it. The current firmware on it is April 2019 but it won't seem to upgrade to the latest automatically. Suspect it is because the box says LG U+ which is a Korean carrier and the updates normally come from there. Is this some sort of region lock issue that I need get a U+ SIM in making the calls for the first 5 mins? Have never rooted a phone before so apologies and bash if necessary, but if I use something like Odin, will that unlock VoLTE options if I update to the latest version and will is disable other features and delete the factory installed apps? Many thanks for any advice and guidance.

Question Xiaomi 11t Pro VoLTE and Vowifi

HI Guys,
I just bought this phone for sure I love it but I live in an area where VoLTE is and VoWifi is a must to have due to poor mobile reception
I used the dial in numbers to get VoLte and and Vowifi activated got success and was able to switch them on from Mobile network menu, but they aren't working at all I tried with flight mode on and off for Vowifi same thing, tried sim card from another network no use, and signs for VoLTE or Vowifi hasn't come on notification panel also
I am on Global Rom
MIUI Version 12.5.10 (RKDMIXM)
Does anyone knows any solution to this
Thanks in advance
I've had a problem with my carrier and Wi-Fi calling which I had to fix myself. Xiaomi do nothing except bundle the default carrier settings and very little testing is done if any. There is a good chance the carrier configuration settings for your carrier are missing or broken.
If you can let me know the carrier and country you are trying to get it to work with I will take a look at the modem configuration settings for that carrier and see if it has anything in it for VoWiFi or VoLTE.
Getting it fixed however, unless you go down the technical route of using Qualcomm debug tools and unlocking the bootloader and rooting, the chances of getting it fixed is close to zero. Xiaomi have never looked at the bug report I filed months ago.
HI Philip,
Thank you for the response I am in Australia using Telstra network, I tried Optus Sim as well having the same issue with it, the only solution I could find is in below link
https://forums.whirlpool.net.au/archive/3rppj4r3
It says have to enter into Modem test tools to change region and network to Australia which isn't possible without unlocking the bootloader, I have requested bootloader unlock permission if it doesn't help will need to switch the phone
awais_666 said:
Thank you for the response I am in Australia using Telstra network, I tried Optus Sim as well having the same issue with it, the only solution I could find is in below link
https://forums.whirlpool.net.au/archive/3rppj4r3
It says have to enter into Modem test tools to change region and network to Australia which isn't possible without unlocking the bootloader, I have requested bootloader unlock permission if it doesn't help will need to switch the phone
Click to expand...
Click to collapse
I've looked at the modem configuration file relating to IWLAN and the settings are there. It is noted a Certificate is required to join the IWLAN for VoWiFi so it is possible that certificate isn't on the phone or is now out of date so a connection isn't allowed. It is also possible other configuration settings in the config file are out of date and need updating. If it is possible to get another carrier modem file to work, then often other things can break, but at least that would give a pointer to what changes need to be made by comparing the two.
It should be noted that Xiaomi don't really test these devices everywhere and they seem to just use the default Qualcomm provided carrier modem files and hope for the best in any particular country. You can use the feedback options to tell them of a problem but in my experience you will never get a response and in my case they've never opened a linked file with extra information (on Google drive so I can see who last opened it).
Regarding the other forum info, well I've not been able to get the modem test tool working on the 11T Pro (says to contact the modem team for permission), and the forum posts suggest we need weekly test ROMs where the permissions are enabled, however there are no weekly ROMs for the 11T Pro as far as I know. The next best thing is to modify the same settings using the Qualcomm debug tools, this takes some effort to get working.
PhilipL2021 said:
I've looked at the modem configuration file relating to IWLAN and the settings are there. It is noted a Certificate is required to join the IWLAN for VoWiFi so it is possible that certificate isn't on the phone or is now out of date so a connection isn't allowed. It is also possible other configuration settings in the config file are out of date and need updating. If it is possible to get another carrier modem file to work, then often other things can break, but at least that would give a pointer to what changes need to be made by comparing the two.
It should be noted that Xiaomi don't really test these devices everywhere and they seem to just use the default Qualcomm provided carrier modem files and hope for the best in any particular country. You can use the feedback options to tell them of a problem but in my experience you will never get a response and in my case they've never opened a linked file with extra information (on Google drive so I can see who last opened it).
Regarding the other forum info, well I've not been able to get the modem test tool working on the 11T Pro (says to contact the modem team for permission), and the forum posts suggest we need weekly test ROMs where the permissions are enabled, however there are no weekly ROMs for the 11T Pro as far as I know. The next best thing is to modify the same settings using the Qualcomm debug tools, this takes some effort to get working.
Click to expand...
Click to collapse
Thanks for the info Philip, let's see there is a Xiaomi.eu fastboot rom available hopefully it helps if doesn't better I would switch to some other phone, only Xiaomi phones which lasted with me long enough were Mi 5, and Mi Note 10, would love have Mi 5 again but those days are gone now as xiaomi has stopped thinking about there fans
awais_666 said:
Thanks for the info Philip, let's see there is a Xiaomi.eu fastboot rom available hopefully it helps if doesn't better I would switch to some other phone, only Xiaomi phones which lasted with me long enough were Mi 5, and Mi Note 10, would love have Mi 5 again but those days are gone now as xiaomi has stopped thinking about there fans
Click to expand...
Click to collapse
I can confirm the Xiaomi.eu ROMs contain exactly the same modem files (they don't touch them), so I doubt very much it will be any different. By all means give it a go if you like.
Hi Philip,
Have you checked EEA firmware if that has it?
awais_666 said:
Hi Philip,
Have you checked EEA firmware if that has it?
Click to expand...
Click to collapse
Yes I checked the EEA firmware. From what I've seen investigating my own issues with VoWiFi is that all the firmware regardless of region contain the same standard Qualcomm modem files, even across different devices, not just the 11T Pro.
Did you try to disable carrier check? Dial *#*#86583#*#* in phone and then the VoLTE option would appear into sim options.

Question "Device incompatible with network" When trying to activate Find x3 Pro at Metro by t-mobile

As the title says. I went to my local metro by tmobile store to activate my new Find x3 Pro but was unable to due to the device not being compatible with metro. The x3 pro that I'm trying to activate is the chinese rom version that I purchased on ebay (if that matters)
Has anyone else have an issue like this?
Hi - I am in the same boat as you. I just bought a Oppo Find x3 Pro for my girlfriend and was amazed to see its IMEI fail the T-mobile checker. My Vivo x60 pro plus is allowed. That is odd since Oppo's parent company also makes the OnePlus which is offered by T-mobile so it can't be anything hardware related. It even has a few more Bands than my Vivo has.
I was worried about my Vivo since VoLTE wasn't provisioned but got lucky when I updated to the new Origin2.0 OS (Ocean)
So the hope is that once the Oppo Find x3 Pro is allowed to update to the new ColorsOS 12 that maybe it will be able to provision?
When I updated my Vivo, I got a prompt that said 'You aren't enabled for VoLTE yet, you want to enable it?' So once I hit yet, it set it up and it works great.
One worry is that the code I was using to check my Vivo was *#*#4636#*#* didn't do anything on the Find x3 Pro. Are there other codes for the Oppo?

Question Missing NFC on Mi Note 11, is it missing hardware or disabled software?

Does anyone know if there's a way to get the NFC working on my Mi Note 11?
I'm in Australia and have gone from a Mi 9 with NFC to a Mi Note 11 which seemed to have it in the advertised specs, but after some googling, and seeing a little asterisk next to the NFC label saying that NFC compatibility was "*dep. on the region", I'm left with a phone that doesn't have any NFC menu in the OS at all.
Is it something that can be fixed by flashing a different firmware, or is there some kind of hardware limitation with my specific model?
Full specs attached
Quick look on your version shows that you have 13.0.6 SGCMIXM
13.0.6: MIUI 13
S: You are on Android 13
GC: You are on the non-NFC model. My RN11 with NFC is GK
MI: Global ROM
XM: Xiaomi
Your model is the non-NFC version

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