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[Q] Xperia T Wi-Fi problem

I just got an Sony Xperia T,
now I was trying to connect is to my router with the 5ghz-band, but the Xperia T can't find the network,
so then manually added the network, inserterd password, but then it says that the network isn't within reach,
but i'm sitting next to the router, the 2.4ghz-band works fine, and sony confirms that the phone should work with
the 5ghz-band in the white paper of the phone. Does anyone know how to solve this problem?
BTW, my router is a Netgear WNDR3700 Dual Band.

Dutchmann said:
I just got an Sony Xperia T,
now I was trying to connect is to my router with the 5ghz-band, but the Xperia T can't find the network,
so then manually added the network, inserterd password, but then it says that the network isn't within reach,
but i'm sitting next to the router, the 2.4ghz-band works fine, and sony confirms that the phone should work with
the 5ghz-band in the white paper of the phone. Does anyone know how to solve this problem?
BTW, my router is a Netgear WNDR3700 Dual Band.
Click to expand...
Click to collapse
On your router have you set it to dual band as a lot of the time they have it defaulted to 2.4 b/g so you'd need to change it to auto or whatever option allows all. On my Linksys it says 2.4 and 5 as an option in the dropdown. That would be the only reason I can think of. Have you tried with any other device to connect to your 5ghz network?

Likely a router compatibility issue. I can connect to a Linksys e4200 on 5ghz with no problems
Sent from my Xperia T

My Xperia T refuses to connect to my WiFi AP. It's only 2.4GHz, but according to the logs on the AP, it isn't even trying. On the phone side I very briefly see "Connecting" or similar on the AP list, then it reverts to Saved.
Log on phone is filled with entries like this:
Code:
I/wpa_supplicant( 565): wlan0: Trying to associate with 00:0c:42:XX:XX:XX (SSID='LFWnet' freq=2412 MHz)
I/wpa_supplicant( 565): wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:0c:42:XX:XX:XX status_code=1
MAC's partially XX'd
This happened on the stock Vodafone ROM, and still occurs on the Generic UK posted in General. I have tried WPA and WPA2, TKIP and AES, different channels, disabling N etc etc, still the same
Tried soft/hard reboots, wipes etc, nothing. It has connected to other public and protected AP's fine.
Am gutted as changing my AP to work around this problem is a no-go. Not had any problems with various other laptops and phones, including other SE/Xperia devices.

LadFromWales85 said:
This happened on the stock Vodafone ROM, and still occurs on the Generic UK posted in General. I have tried WPA and WPA2, TKIP and AES, different channels, disabling N etc etc, still the same
Tried soft/hard reboots, wipes etc, nothing. It has connected to other public and protected AP's fine.
Am gutted as changing my AP to work around this problem is a no-go. Not had any problems with various other laptops and phones, including other SE/Xperia devices.
Click to expand...
Click to collapse
I'm on generic UK rom and using a BT Home Hub without any problems. I've also got my old dLink wireless n router I use as a print server and it works fine with that too. My brother has a Sky router (Netgear I think) and that works fine.
I think you must be unlucky.
---------- Post added at 07:11 AM ---------- Previous post was at 07:07 AM ----------
Is your SSID published? Have you tried turning off all security on the router to see if you can connect then? (obviously I'm not suggesting you leave it unsecured but it is something to try.)
Also, posting your router details may give you an idea if others have been successful with that router before you splash any cash on a new one.

Hi, my Xperia T also is not able to connect with my e4200 5 GHz WiFi. My Laptop and a Samsung Phone works without any problems... I read (sorry I don´t remember the forum link) Sony did not enable the 5 GHz frequency because of driver issues. But if it works on some phones, maybe it´s a provider specific issue like the permanent bootloader lock?

Might be worth updating the firmware of your router?
Sent from my LT30p using xda app-developers app

I think I found the problem, the 5ghz band of my router doesn't have much range appearently, when i'm trying to find the 5ghz band outside of my house, i can't find it, I can only find it when i'm in my room, that's where the router stands, but the 2.4 ghz band has a much better range, I can connect to is almost 20-30 meters outside of my house. I'm wondering when Netgear is coming out with an update for my router, hopefully that will solve the problem, or maybe it will be solved when the Xperia T gets an update to Jelly Bean.

Dutchmann said:
I think I found the problem, the 5ghz band of my router doesn't have much range appearently, when i'm trying to find the 5ghz band outside of my house, i can't find it, I can only find it when i'm in my room, that's where the router stands, but the 2.4 ghz band has a much better range, I can connect to is almost 20-30 meters outside of my house. I'm wondering when Netgear is coming out with an update for my router, hopefully that will solve the problem, or maybe it will be solved when the Xperia T gets an update to Jelly Bean.
Click to expand...
Click to collapse
Hi there,
I've just bought the Xperia T and I'm pretty disappointed I can't use my home wifi.
I'm having exactly the same problem - I can see my connection and connect (sometimes) but it is a very poor connection, then after a minute or says "Not in range". If I go outside (which is actually closer to where the modem is) I can get data at an acceptable speed.
Sorry I'm such a noob but can you explain to me where the limitation lies and how I might fix it. Every other device used in the house works - even an old iphone 3gs - I'm surprised Sony's newest phone hasn't implemented technology that must have been in use for years.
Or if it is the modem - any ideas on how to change it.
Sorry - can't give you details - the modem is locked in the landlords garage - so I can't see what make it is.
Thanks for helping a noob.

I have faced the same problem with my TX when connecting to my AP.
I think there is WIFI problem in receiving the WIFI signal of security mode WPA2/WPA.
You can change the WIFI security mode to WEP or No security.
My device can connect the WEP mode WIFI.
Hope you can solve the problem!
pechnatunk said:
Hi there,
I've just bought the Xperia T and I'm pretty disappointed I can't use my home wifi.
I'm having exactly the same problem - I can see my connection and connect (sometimes) but it is a very poor connection, then after a minute or says "Not in range". If I go outside (which is actually closer to where the modem is) I can get data at an acceptable speed.
Sorry I'm such a noob but can you explain to me where the limitation lies and how I might fix it. Every other device used in the house works - even an old iphone 3gs - I'm surprised Sony's newest phone hasn't implemented technology that must have been in use for years.
Or if it is the modem - any ideas on how to change it.
Sorry - can't give you details - the modem is locked in the landlords garage - so I can't see what make it is.
Thanks for helping a noob.
Click to expand...
Click to collapse

Skylegend said:
I have faced the same problem with my TX when connecting to my AP.
I think there is WIFI problem in receiving the WIFI signal of security mode WPA2/WPA.
You can change the WIFI security mode to WEP or No security.
My device can connect the WEP mode WIFI.
Hope you can solve the problem!
Click to expand...
Click to collapse
Hmmm, that's strange - my modem is set to WEP and it's not really a connection problem but a signal strength problem. But like I said - no other device has this issue. It is hard to test - right now I'm accessing this from a cloud connection which is average compared to another I used this morning, though much better than at home. But I don't know how close I am to the transmitter right now.

Hello again,
I'm still trying to get to the bottom of this:
So my Xperia T can connect and use the wifi in my house fine IF I am within 2-3 metres of my router, which has the following settings -
O2 Wireless Box, model - TG585v7
Software release - 8.2.7.7
Boot loader 1.0.0
Interface Type: 802.11b/g
Band: 2.4G Hz (This unfortunately cannot be changed)
It is currently set to WEP security but when I changed to WPA-2 there was still no change - could only connect when a couple of metres away.
Also even when holding my phone 10cm away from the router I still only get a "Good" connection. So I started to think it must be my phone that is faulty - I've been to coffee shops and picked up the free Cloud wifi ok, though one kept dropping in and out. And I have been into mobile phone shops testing their wifi and it connects.
But yesterday I went to Carphone Warehouse and compared to one of their demo Xperia T phones - the demo was connected to their wifi fine yet my phone could not even "see" their connection - I was sure it was my phone.
But now I'm really confused - today I went to a different Carphone warehouse - there was no demo phone but I picked up their signal and the quality was "Excellent" - something I'd never seen before.
My phone is locked to T-Mobile - can a carrier locked phone somehow restrict access to certain routers?? Seems very weird to me, though I am quite a novice at all of this.
Any help would be much appreciated.
Thanks.

locked phone won't block AP access... maybe backup your data and try master reset.. factory reset... don't need erase sd card.
Sent from my LT29i using xda app-developers app

Are you using the T-Mobile WiFi app? If so delete your connection from settings, then set your home WiFi via the T-Mobile app, it may be connecting to the open one not your full one.
If you don't use the app, I would change the channel on the router and try that.
Sent from my LT30p using xda app-developers app

xperia t
I use Xperia T in Turkey but I bought ıt in Bosnia. I checked my phone's ID and ın myphone has got Vodafone Wi-Fi .. When My phone's Wi-Fi is online then suddenly myphone begin afresh itself. What is the problem please help me ..

I had the same problem then I discovered it happen only in stock firmware or stock based ROM. Try Flashing CM10 or CM10.1. Your problem will likely be solved.

My Razr i makes WiFi drop/crash

Hi folks !
Recently I started to experience some troubles using my WiFis connections. The problem is simple, the connection drops, the WiFi network disappears from all the devices, and a few seconds later it comes back.
At first I thought it was a problem with the router of my work. But then I started to experience the same things at home. Then I decided to test the WiFi without connecting my Razr i to it and it worked like a charm. Now, as soon as I connect my Razr i to a WiFi, it crashes a few seconds/minutes later and keep doing it until I disconnect my phone from the WiFi.
Did someone experience the same thing ? Have you any idea for solving the problem ?
Thanks anyway.
PS : I only use 5Ghz WiFis. I'll try with 2.4 soon but the 5Ghz compatibility was one of the reasons why I bought this phone...

We have also issues with our WLAN at home, which is sometimes (but not always) very unstable in connection with a Samsung 5 Laptop (regular reboots shortly after activating the laptop Wifi).
I did not experience this problem yet with my Razr i, but I will keep it in mind over the next days (we have a complex setup with several computers, phones and Android entities based around a Fritzbox 7390, so error identification and validation takes very long and is not finished yet).
BTW - if you look for help here, please specify your WLAN router in detail as well as your provider and general IT-setup.

Tevac said:
We have also issues with our WLAN at home, which is sometimes (but not always) very unstable in connection with a Samsung 5 Laptop (regular reboots shortly after activating the laptop Wifi).
I did not experience this problem yet with my Razr i, but I will keep it in mind over the next days (we have a complex setup with several computers, phones and Android entities based around a Fritzbox 7390, so error identification and validation takes very long and is not finished yet).
BTW - if you look for help here, please specify your WLAN router in detail as well as your provider and general IT-setup.
Click to expand...
Click to collapse
Well ! Thanks for the reply.
My router that provides the two WiFis is a Cisco Linksys WRT61N.
My setup is kinda complex but works well. Got another router provided by my ISP, which is the DHCP server. This router is connected to a port of the WRT61N switch. Not to the internet port. Every connection that enters in the ISP router goes to the Linksys, and then is NATed by it. I don't think those informations are very relevant but anyway here they are. That's a complex setup but it works well (needed to do that because I have cable connection, and the cable modem/router have very limited configuration).
The devices that use my two WiFi are :
2.4Ghz : My Razr i right now.
5Ghz : Two iPads, and the HTC 8X of my girlfriend.
I made some other tests, one the Razr i there is an option for switching on or off a kind of network frequency. So instead of both enabled, I enabled only the 2.4Ghz WiFi frequency and connected my phone to my 2.4Ghz WiFi. No problems detected. Stable connection. Right now I'm at work, and everything works well in 2.4Ghz. So there is clearly a problem with the 5Ghz frequency on my Razr i.
Anyway, during those tests, I discovered something very interesting. My battery life had a huge improvement with the desactivation of the 5Ghz WiFi frequency.

Thanks for the details - especially on the 2.4/5 GHz topic.
I am also at work right now, but will check it at home and keep you posted.

WPA2
I had the same problem, I think it was triggered everytime the phone went to "sleep". It was changing the security encryption that fixed it for me. I can't remember what i had on the router as default, and I'm not at home right now to check what I'm running, but I believe it's WPA2. After the change, I had no trouble whatsoever. Hope this helps, good luck!
EDIT: nevermind what i said, i just logged into my router and remembered it wasnt the encryption type settings, but rather the wifi standard used, it used to be 802.11 b+n+g, and now i got it sitting at 802.11 b+g, which equals to 2.4 GHz. Meaning the razr has apparently a problem with the 5 GHz spectrum..

I too have a RAZRi which is connected by wi-fi at home to a Fritz!Box 7390. I noticed that when the RAZRi went into sleep mode with wi-fi connected (keep wi-fi on setting) it would have lost any internet connection on waking, requiring a disconnection/reconnection to reset. More annoyingly there was also a loss of connection (IP address) at laptops also connected to the router by w-fi on both 2.4GHz and 5GHz connections, which needed a reboot of either the PC or the router to re-establish a connection. The router GUI would show them all as remaining connected.
By using the manual setting on the router to restrict 2.4GHz connections to b+g (not b+g+n), it looks so far as though both problems are avoided, and the RAZRi can be set to use either the available 2.4GHz or 5GHz (a+n) connection on the Fritz! successfully without problems. EDIT big problem is though that disabling "n" on 2.4GHz seems to cause wi-fi throughputs to crash by more than 50% on both frequencies (which for me negates the benefit of having VDSL) - they recover if I re-enable, but then the lockups start if the phone is connected. A hobsons choice.
Thanks guys.

[Q] this is one of the weirdest things I've ever encountered

I use an ASUS RT-N16 w/dd-wrt as my house router. I routinely have 4 devices on its wireless. This is the scenario (which has only just started happening recently):
my wife will connect her S5 to the WiFi at home
the S5 will report connected
every other device on the WiFi that is handy (haven't checked if it happens to my Roku) will be kicked off the WiFi
the S5 will be disconnected
I will have to manually reconnect my other devices, which report an "authentication issue"
The other devices in question are: my Optimus G, my Shield Tablet, our Acer Win8 laptop. Signal strength is not an issue. I have tried:
setting the S5's WiFi connection to our router to a static address
resetting the router to factory default
changed the channel on the router's WiFi
disabling the router's ACK timing
changed the router's WiFi mode to NG-Mixed
Has anyone ever encountered anything like this? Definitely one of the oddest issues I've ever had the "pleasure" of dealing with.

t-readyroc said:
I use an ASUS RT-N16 w/dd-wrt as my house router. I routinely have 4 devices on its wireless. This is the scenario (which has only just started happening recently):
my wife will connect her S5 to the WiFi at home
the S5 will report connected
every other device on the WiFi that is handy (haven't checked if it happens to my Roku) will be kicked off the WiFi
the S5 will be disconnected
I will have to manually reconnect my other devices, which report an "authentication issue"
The other devices in question are: my Optimus G, my Shield Tablet, our Acer Win8 laptop. Signal strength is not an issue. I have tried:
setting the S5's WiFi connection to our router to a static address
resetting the router to factory default
changed the channel on the router's WiFi
disabling the router's ACK timing
changed the router's WiFi mode to NG-Mixed
Has anyone ever encountered anything like this? Definitely one of the oddest issues I've ever had the "pleasure" of dealing with.
Click to expand...
Click to collapse
That is weird. I have all sorts of stuff connecting to my WiFi. I use a WD router that has worked extremely well. I would suspect something wrong with the router.

Sometimes routers go bad like any other computer part. Do you have another router to test with your setup?
Looked at some of the reviews of your model and some people had major problems. It has a two year warranty, perhaps get an RMA if still time left. Of course flash it back to stock.

I got the suggestion from elsewhere to create a guest network for her. DD-WRT's got the ability to create a fully isolated guest network, but I only had to create a new wireless vlan for her (bridged, even) & she's happily connected on her own little space (& I'm still happily connected on mine).
More of a workaround than a solution, but hey...

Nicely done.

Update!
My wife took her S5 w/her down to a girls' weekend getaway, & she had to turn off her WiFi while she was at the house because, you guessed it, she kept kicking every other client off of the network!
I'm happy at home w/her on a separate WLAN, but I really do wonder wtf's going on w/her phone...

Very strange Wifi stability problem with P20 Pro, please help.

Hi everybody,
When i'm on my home Wifi network, i've tryed 2,4ghz & 5ghz bands, a static ip adres, changed various DNS servers. I tryed a full system reset.
Surfing, checking twitter or anything else loading does go very slowly or sometimes takes 15/20 second before the connection pics up. It looks like the connection goes in battery save mode or something like that. When i'm on LTE there are no problems.
I have a Huawei P20 pro for a month now and been never able to get a stable wifi connection only on my home wifi router. First i had a TP-Link Touch P5 router and second a TP-link Archer C3150. I've downloaded all updates on the P20 and on the routers. Other phones, like the Galaxy S8 or a tablet function without any problems. When i use my phone on any other wifi router but my own, there's also no problem with the wifi connection.
I googled the combination of my routers and the P20 for any wifi stability problem but can't find anything similair to my problem.
Anyone has some suggestions to help fix this very annoying problem?
Thank you,
Ron.

I'm having a similar problem here. 5ghz wifi comes to a crawl of max 10mbps down where is I usually get 200. It's only this device.
Basically when it first connects to the network it's finr, but after a wee while it comes to a crawl. Have tried configuring pretty much everything. My modem is a NetComm wireless nfv18ac

I have the same issue on p40 pro.
Sent from my ELS-NX9 using Tapatalk

Since you are saying that it happens only on your home WiFi I would assume it has nothing to do with the smartphone, but with the router configuration.
Do you have some kind of QoS/bandwidth limit configured on the router? Do you have a lot of devices connected? It's a bummer, but maybe try factory reset on the router (save config somewhere before that).

[I3113] WiFi issues

Hello together,
I have a weird issue with my Xperia 10 (I3113 with unlocked Bootloader on 53.1.A.2.2).
At work we use Cisco ISE Sponsor Portal to provide WiFi guest access. I login using my credentials and everything works fine.
After a while I have to re-authenticate - this happens multiple times per day.
I noticed a similar issue with my WiFi at home. The phone is connected to the WiFi but has no internet access (same phenomenon as at work).
Has somebody experience a similar issue? Is this maybe related to the unlocked bootloader?
Greetings

I had wifi issues before i4193. It disconnects then reconnect itself automatically. I read some thread for xperia phones sine im unable to find any discussion specific for xperia 10. Luckily i found something saying that it underestimate the signals for dual band routers with 2.4 and 5ghz. My router at home is dual band but sharing the same ssid. I have it separated and now problem no longer exist. I can connect either to 2.4 or 5ghz signal without being disconnected. Hope this help.

Thanks for your reply.
I'm gonna try 2.4 GHz only and give feedback