Database Develop

[Q] 5GHZ Wi-Fi not showing up?

My 5ghz wifi network is not showing up on my Xperia Z.
What may be the problem?
I can see the 2.4 fine but the 5GHZ is completely missing...
Is there something wrong with the phone?

Got a SIM card in the phone? Sometimes 5Ghz and some channels don't show up without a SIM installed.
Sent from my C6603 using xda premium

Interesting.
I do not have an LTE sim for it yet, I bought it from the Sony Store directly.
I will have to try it out. Does a 3g sim work as well? Or do I need an LTE sim to have access to the 5GHZ wifi bands?

I had the same problem. Repeated scans didn't reveal it (or another router from a neighbour) but after a reboot and rescan it showed.
I can also say that my Nexus 4 connected only at 72Mbit but the XZ connects at 150. That's nice and it seems to hold the signal well even in a few near dead areas of the house.
I can't remember if there was a SIM in the first time around as I had been initially using it out of the box without one, but I'm pretty sure it did. In any case, it does have a SIM now (Three UK, so only 3G for now - albeit DC-HSPA giving speeds of 15-20 megabits).
The type of SIM and whether you have access to LTE won't affect Wi-Fi in any way. That would be purely coincidental!

Even with repeated scans I do not see the 5ghz band. This is strange. Is my device defective?
I am going to buy a sim card now.
Going to hope for the best.

Mitsuya Cider said:
Even with repeated scans I do not see the 5ghz band. This is strange. Is my device defective?
I am going to buy a sim card now.
Going to hope for the best.
Click to expand...
Click to collapse
For me the same (Apple router).

FritzBox 7270 5 GHz OKAY
Hi !
My Z can detect % work on the 5GHz band using a FritzBox 7270.
It then conncts with 150 MBit...
Greetings,
Ender

Now it's working, you need a simcard inside to detect the 5GHZ.

My C6603 with sim card installed doesn't show 5GHz networks.

Try different channel on the router

irrelevant, WiFi Analyzer doesn't even want to swap to 5GHz scanning mode.

What 5Ghz protocol are you using on the router? are yu still only using beta protocols? Have you updated your router software?
I'm connected to my home router with 5Ghz and it works like a charm.

Rashkae said:
What 5Ghz protocol are you using on the router? are yu still only using beta protocols? Have you updated your router software?
I'm connected to my home router with 5Ghz and it works like a charm.
Click to expand...
Click to collapse
These are enterprise Meru Networks APs... Samsung Galaxy Nexus worked like a charm

ankhazam said:
These are enterprise Meru Networks APs... Samsung Galaxy Nexus worked like a charm
Click to expand...
Click to collapse
Hmmm. I'm on netgear. Z works like a charm.
Sent from my gorgeous White Xperia Z

I think I traced the problem... I can notice channel 14 avaiable on 2.4GHz I suppose I got stuck in Japan Wifi domain...
Any ideas how to enable that 5GHz module?

ankhazam said:
I think I traced the problem... I can notice channel 14 avaiable on 2.4GHz I suppose I got stuck in Japan Wifi domain...
Any ideas how to enable that 5GHz module?
Click to expand...
Click to collapse
On what? If your router is 5GHz and broadcasting you should see it displayed.
Same here on Linksys dual band 5GHz, after some initial issues, my phone had problems trying to connect to them, but once I rebooted the router the phone has been fine since. Phone flys on speedtest 66718kbps, goes around the clock
I did note that it was not easy to get the WIFI to work first off (showed authentication problem), but once I had sucessfully connected to any WIFI network and deleted my previous attempts when I went back in to setup the access point all was fine.

even after factory reset no 5GHz

I have tried tweaking the database settings to Japan. Added wifi frequency band and set value to 1. I believe the problem is with the country wifi 5ghz standards and Sony somehow detects the Country. The phone frequency worked in Canada and Hong Kong. But when I'm in China with or without Sim card inserted the 5ghz cannot pick up or see.
I have the note 2 as well s3. Note 2 needs no tweaking, s3 needs tweaking and can pick up 5ghz but the xperia z shows nothing with or without tweaking.

yeah, that's funny cause I'm in EU with local simcard and the phone has 5GHz disabled

cruiseyunfat said:
I have tried tweaking the database settings to Japan. Added wifi frequency band and set value to 1. I believe the problem is with the country wifi 5ghz standards and Sony somehow detects the Country. The phone frequency worked in Canada and Hong Kong. But when I'm in China with or without Sim card inserted the 5ghz cannot pick up or see.
I have the note 2 as well s3. Note 2 needs no tweaking, s3 needs tweaking and can pick up 5ghz but the xperia z shows nothing with or without tweaking.
Click to expand...
Click to collapse
All countries have different regs on 2.4GHz & 5GHz bands, some countries do not even allow it.
In May 2012 Japans authorisation to use 5GHz bands for wifi expired Channels (34,38,42 & 46). You should be able to use 5GHz channels 36,40,44 and 48 in Japan at 20/40MHz
In China only 5GHz Channels 149,153,157,161 & 165, above what my phone shows as options only goes to channel 64.
Your location is determined, the first SIM card you put into the phone, which is why some people report not seeing 5GHz until inserting the SIM, the same would happen in countries that use the high bands (Channel 14) of 2.4GHz until the SIM was inserted these bands would not be discoverable. Then each time you insert a sim the carrier send info to the phone of your timezone etc.
---------- Post added at 11:03 AM ---------- Previous post was at 11:01 AM ----------
ankhazam said:
yeah, that's funny cause I'm in EU with local simcard and the phone has 5GHz disabled
Click to expand...
Click to collapse
Where did you purchase your phone from, and where in the EU are you? Because 5Ghz WIFI channels supported by the phone are available across most of Europe in you have 36,40,44 & 48

High QAM capabilities but poor Wi-Fi performance?

I'm using Huawei Mate 20.
First, the device claims to have Wave 2, 4x4 MIMO with MU-MIMO support.
Normally, smartphone only has 2x2 MIMO, including the closest rival, One plus 6T.
Sounds pretty good so far, but after I perform speed test, result shows otherwise. The QAM capabilities are good and I'll explain more in the conclusion. Below is my test result.
Do share your speed tests too! And let's discuss!
My Test Result:
2.4GHz:
PHY/link speed of 72Mbps (tested at same distance from router)
- Mate 20: 35Mbps down, 40Mbps up
- Samsung A7: 42Mbps down, 48Mbps up
- Oppo F9: 42Mbps down, 48Mbps up
With several other distances tested, the speed is always lacking on the Mate 20. Even lower end device like Oppo F9 is consistently faster than the Mate 20. What's happening actually?
5GHz :
Will test after I get my new router.
Conclusion
But the claimed QAM capabilities can be noticed when you go to WiFi setting and check the link speed.
With 5GHz 2x2 MIMO router, the link speed can achieve full 866Mbps (meaning 256QAM). But actual speed is yet to be tested, which I suspect will be having same issue just like on the 2.4GHz (below par speeds).
Wifi explanation on PHY, QAM, etc:
https://www.duckware.com/tech/wifi-in-the-us.html

I believe the 4x4 mimo is related to cellular LTE not to wifi

saw man said:
I believe the 4x4 mimo is related to cellular LTE not to wifi
Click to expand...
Click to collapse
It's not true. The official specification of Mate 20 & Mate 20 pro, has WiFi spec below:
802.11 a/b/g/n/ac (wave2), 2.4 GHz and 5 GHz
https://consumer.huawei.com/en/phones/mate20/specs/
So, why the actual transmission speed is slower than cheaper phones?

Xiaomi's/MIUI's Network Band Prioritization

Hello guys,
I'm using Mi9T Pro with Stock EU rom MIUI 12 version 12.0.4
I have this issue with Xiaomi regarding how the system handles prioritization of Network Band when it comes to using Mobile Data connection.
We know that we have options to prefer 4G, 3G or 2G. But it doesn't define which specific band. Like for example, 4G can be 4G/LTE or 4G+/LTE+. These 2 networks seem to be the same but these actually have different network bands
The question is how does Xiaomi system prioritize which band to select?
Does it prefer the one with higher signal or the one that pings better.
I have this question because as I have experienced, Xiaomi system seem to prefer the one with better signal regardless if it can't even pull any data. In short, it will keep connecting to a network with a better signal strength even if you won't get any internet connection out of it.
I've been noticing this when I set my phone to 4G preferred in my location. When signal indicator turns to 4G/LTE. It may seem to show you that you're connected to the internet but you can't really browse anything because there's actually no data for that band. But when it turns to 4G+, that's when I really get to connect to the internet.
And the biggest problem is that the system prefers to connect to the 4G band. That's why I'd prefer using 3G network because I have a more stable 3G+ signal here.
Another thing that's really disappointing is that my other phone OnePlus 5T handles this well. We share the same APN.
Sadly there's no band selection in *#*#4636#*#*
It would be glad if anyone could provide a better solution to this.
Thank you!

peeweew said:
We know that we have options to prefer 4G, 3G or 2G. But it doesn't define which specific band. Like for example, 4G can be 4G/LTE or 4G+/LTE+. These 2 networks seem to be the same but these actually have different network bands
...
I've been noticing this when I set my phone to 4G preferred in my location. When signal indicator turns to 4G/LTE. It may seem to show you that you're connected to the internet but you can't really browse anything because there's actually no data for that band. But when it turns to 4G+, that's when I really get to connect to the internet. ..
Click to expand...
Click to collapse
4+ g usually means (specially on Xiaomi phones) LTE Advanced Carrier Aggregation where no other/different bands are used but instead the phone is in parallel attached to more than one 4g band. As such, it increases the speed (and maybe, in your case provides a fail-over?!):
https://www.gizbot.com/mobile/featu...ifference-between-4g-4g-explained-053769.html
However, there is another question why (on that place) you have strong 4g signal with no Internet, so that when your phone switches to CA and in parallel attaches to another 4g band (maybe with a weaker signal) it obtains Internet connection over that second band
At least to better understand on which band (at which place and which base station) you have a 4g signal but with no Internet connection, install an app like Network Cell Info Lite, LTE Discovery, Net Monitor Lite). I think with Net Monster (all apps are on Playstore) you can even see on the map where is the base station you are attached to
If your phone is rooted, you could use Network Signal Guru that will show you, in case of 4+g all bands you are aggregated to with their signal strengths, base stations locations, etc (apps above would always show just one, primary band):
https://forum.xda-developers.com/mi-9t/help/monitoring-4g-advanced-aggregated-t4107967

zgfg said:
4+ g usually means (specially on Xiaomi phones) LTE Advanced Carrier Aggregation where no other/different bands are used but instead the phone is in parallel attached to more than one 4g band. As such, it increases the speed (and maybe, in your case provides a fail-over?!):
https://www.gizbot.com/mobile/featu...ifference-between-4g-4g-explained-053769.html
However, there is another question why (on that place) you have strong 4g signal with no Internet, so that when your phone switches to CA and in parallel attaches to another 4g band (maybe with a weaker signal) it obtains Internet connection over that second band
At least to better understand on which band (at which place and which base station) you have a 4g signal but with no Internet connection, install an app like Network Cell Info Lite, LTE Discovery, Net Monitor Lite). I think with Net Monster (all apps are on Playstore) you can even see on the map where is the base station you are attached to
If your phone is rooted, you could use Network Signal Guru that will show you, in case of 4+g all bands you are aggregated to with their signal strengths, base stations locations, etc (apps above would always show just one, primary band):
https://forum.xda-developers.com/mi-9t/help/monitoring-4g-advanced-aggregated-t4107967
Click to expand...
Click to collapse
Ohhh thank you for this explanation.... Someone actually mentioned aggregation to me also. This helps make me clear up how Xiaomi does this and that. Does this mean force selection of network band won't work on Xiaomi devices?

peeweew said:
Ohhh thank you for this explanation.... Someone actually mentioned aggregation to me also. This helps make me clear up how Xiaomi does this and that. Does this mean force selection of network band won't work on Xiaomi devices?
Click to expand...
Click to collapse
I'm pretty sure that with MIUI 11 there was an option to disable/enable 4+, but on MIUI 12 (12.0.2 QFJEUXM) there is no more that option
I don't know of other options (except to prefer 4, 3 or 2 g), specially about selecting bands

choose band mode
peeweew said:
Hello guys,
I'm using Mi9T Pro with Stock EU rom MIUI 12 version 12.0.4
I have this issue with Xiaomi regarding how the system handles prioritization of Network Band when it comes to using Mobile Data connection.
We know that we have options to prefer 4G, 3G or 2G. But it doesn't define which specific band. Like for example, 4G can be 4G/LTE or 4G+/LTE+. These 2 networks seem to be the same but these actually have different network bands
The question is how does Xiaomi system prioritize which band to select?
Does it prefer the one with higher signal or the one that pings better.
I have this question because as I have experienced, Xiaomi system seem to prefer the one with better signal regardless if it can't even pull any data. In short, it will keep connecting to a network with a better signal strength even if you won't get any internet connection out of it.
I've been noticing this when I set my phone to 4G preferred in my location. When signal indicator turns to 4G/LTE. It may seem to show you that you're connected to the internet but you can't really browse anything because there's actually no data for that band. But when it turns to 4G+, that's when I really get to connect to the internet.
And the biggest problem is that the system prefers to connect to the 4G band. That's why I'd prefer using 3G network because I have a more stable 3G+ signal here.
Another thing that's really disappointing is that my other phone OnePlus 5T handles this well. We share the same APN.
Sadly there's no band selection in *#*#4636#*#*
It would be glad if anyone could provide a better solution to this.
Thank you!
Click to expand...
Click to collapse
Download activity launcher (play store), run it
Search band mode ===> Set radio band mode
Choose band mode you need

uncomment said:
Download activity launcher (play store), run it
Search band mode ===> Set radio band mode
Choose band mode you need
Click to expand...
Click to collapse
This is what I was looking for.
Thanks!

Question Says 5g at the bars, multiple apps/speed test prove otherwise

Anyone who owns the Chinese version of the mi 11 ultra can test it out?
I got 5g enabled in the settings, confirmed selected in the dialer menu *#*#4636#*#* top bars say 5G and an HD symbol on its left which I confirmed is Vo-lte...
Issue is it's not really 5g but LTE or 4g, how I came to this conclusion was by running various apps/ simultaneous 5g speed tests on both this phone and an older Huawei phone I got..
Mi 11 ultra caps at 140+- dl speeds
Huawei caps at 500+- dl speeds
Provider runs 5g on band n78 which is supported by both phones..
Can running the Eu ROM fix this issue for me?

https://forum.xda-developers.com/t/...-xiaomi-mi-11-pro-ultra.4260617/post-84978259 Happen to me in xiaomi.eu STABLE. In China ROM probably it's a standard fake 5G icon, when connected to 4G/LTE network..

veimus said:
https://forum.xda-developers.com/t/...-xiaomi-mi-11-pro-ultra.4260617/post-84978259 Happen to me in xiaomi.eu STABLE. In China ROM probably it's a standard fake 5G icon, when connected to 4G/LTE network..
Click to expand...
Click to collapse
Thanks for forwarding me there, guess all I can do is try it out and hope for the best otherwise a 12gb/512 is up for sale

n78 is 3.5 GHz 5G band (is wiiide band, is not a 600hz band lmao) Your phone preferred to stay connected to 5G bands more than 4G bands.
Try to switch to 4G network preferred
And check it out your actual speed on 4G
(Huawei supports more bands than xiaomi...due to different processor which is Kirin)

avetny said:
n78 is 3.5 GHz 5G band (is wiiide band, is not a 600hz band lmao) Your phone preferred to stay connected to 5G bands more than 4G bands.
Try to switch to 4G network preferred
And check it out your actual speed on 4G
(Huawei supports more bands than xiaomi...due to different processor which is Kirin)
Click to expand...
Click to collapse

Question Mi 11 ultra no 5G cellular network [ stock global ]

Hello everyone,
I've just upgrade my plan to have 5G support, but the phone does't pick it up ( the carrier says it's ok )..
I also searched manually for networks and I find every network even from other provider but NOT a single one with 5G.
obviously I am in a 5G area, center of Milan, and sim slot 1 ( but I recall that was dual 5G, no? )
It's a bug, broken or I played with some setting disabling 5G?
thanks
EDIT: SEEMS LIKE THAT switching preferred types, airplane mode, while outdoor made the phone to connect t o a 5G antenna...
funny note, it's slower that 3g: 5.69mps/0.59mbps

Might need to enable it

speedtripler said:
Might need to enable it
Click to expand...
Click to collapse
you mean preferred network type? always been in 5G

Try to reset apn configuration and all kind of connection, then switch off the phone for 1 minute and reswitch it on

bob8x said:
funny note, it's slower that 3g: 5.69mps/0.59mbps
Click to expand...
Click to collapse
If you have the chinese model (not EU or global) you might have some 5G band limitations, and it's also to be taken into consideration which bands your operator is using in your area.