4G problem - Xperia Z2 Q&A, Help & Troubleshooting

Hello to all.
I have some data issues with my Z2.
I'm on t-mobile HR (croatia).
So, if the phone is set to preffer LTE data network and when I leave WiFi network the phone can't connect to data network, if there is no LTE network. Than I must set the phone to preffer 3G, phone connects to 3G or 3G+, and than to 4G when I set it to preffer 4G again.
When the phone is set to preffer 3G than if I leave WiFi the phone immediately switch to 3G.
In both casses, after the data network is found (3G, 3G+) and I set the phone to preffer the LTE phone switch to 4G.
I foud this problem since the phone is updated to 4.4.4 Kitkat and now I'm on 5.1.1. Lollipop (.264 version) and the problem still persist.
Please help me to solve it because it's really annoying.
And yes, the whole area is covered with 4G signal, but sometimes is weak.

Zoran81 said:
Hello to all.
I have some data issues with my Z2.
I'm on t-mobile HR (croatia).
So, if the phone is set to preffer LTE data network and when I leave WiFi network the phone can't connect to data network, if there is no LTE network. Than I must set the phone to preffer 3G, phone connects to 3G or 3G+, and than to 4G when I set it to preffer 4G again.
When the phone is set to preffer 3G than if I leave WiFi the phone immediately switch to 3G.
In both casses, after the data network is found (3G, 3G+) and I set the phone to preffer the LTE phone switch to 4G.
I foud this problem since the phone is updated to 4.4.4 Kitkat and now I'm on 5.1.1. Lollipop (.264 version) and the problem still persist.
Please help me to solve it because it's really annoying.
And yes, the whole area is covered with 4G signal, but sometimes is weak.
Click to expand...
Click to collapse
I had the same problem, i flashed eXistenZ rom now and it didnt reoccur. If it reoccurs ill tell you

MathieuBerger said:
I had the same problem, i flashed eXistenZ rom now and it didnt reoccur. If it reoccurs ill tell you
Click to expand...
Click to collapse
well, I don't feel confortable with rooting my device and flashing custom software..it would be great to solve the problem without that

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[Q] Portable Hotspot/Android Tether limited connectivity

For some reason, when I tether my phone's Internet it works fine for a moment or a long time and then it switches to limited connectivity. No Internet connection on any of the connected devices, even if I reset the connection. Only restarting my phone seems to work.
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Has anybody else experienced this? Any solutions would be greatly appreciated.
Well, none of you bothered to reply to this, so I might as well. After I upgraded to 4.1.1 it seemed to work better, and it wouldn't turn off if I leave power saving off. However, the internet still randomly refuses to work on my laptop and only connects again if I restart the phone.
raykyogrou0 said:
Well, none of you bothered to reply to this, so I might as well. After I upgraded to 4.1.1 it seemed to work better, and it wouldn't turn off if I leave power saving off. However, the internet still randomly refuses to work on my laptop and only connects again if I restart the phone.
Click to expand...
Click to collapse
4G or 3G model? I have to turn LTE off because if it bounces around from LTE to 3G+ on my i9305T it tends to hang. I cant use wifi tether at all when CM10.1 when LTE is enabled, well I can use it but its very unstable. Try turning LTE off. If that's not the issue I'm sorry I can't help.
Ritzo90 said:
4G or 3G model? I have to turn LTE off because if it bounces around from LTE to 3G+ on my i9305T it tends to hang. I cant use wifi tether at all when CM10.1 when LTE is enabled, well I can use it but its very unstable. Try turning LTE off. If that's not the issue I'm sorry I can't help.
Click to expand...
Click to collapse
I don't really know because I don't have LTE at my location, the best reception I get is HSPDA+ which I heard is like 3.5G. I'm not really sure if my device is capable of 4G/LTE. It occasionally switches to E-GPRS when I'm not using the internet. But very rarely (like maybe once in 2 days), the internet just refuses to connect both in my phone and laptop eventhough the data indicator has the green and orange arrow on. When I restart it, it usually works fine. It's really confusing.

[Q] Help about using HSPA

Hi all!
Im using a moto E with Tata Docomo sim.
The problem is that when I change my network mode to WCDMA only, the phone shows only 3G and not H+. However, when I go out of my home, I get H+ with full signal.
I've talked to customer care and the issue is that another cell tower which doesnt support HSPA is stronger in my home so the phone connects to it and only shows 3G even when data transfer takes place. 3G is so much slower than HSPA/HSPAP.
Is there any way I can force my phone to connect to HSPA/HSDPA only?? I dont mind if the signal drops a little. Since it is possible to force the phone to using 3G only, I thought forcing to 3.5G could also be done
Also my phone is rooted so changing any system file is not a problem.
Please help..
Thank you.

LG V10 4G LTE connection problem

Hi,
I have been experiencing a few issues with the 4G LTE on my LG V10 H901 (T-Mobile). What happens is this.
In Network mode I selected GSM / WCDMA / LTE Auto. This initially worked fine and could get a data connection. 2 days after, I noticed I couldn't get a data connection anymore, the 4G LTE icon at the top was displaying with a down arrow lit. So I went in the Network mode and checked my APN everything was ok. Decided to switch from GSM / WCDMA Auto where I got a 4G connection (icon 4G displayed at the top) and I finally got a data connection.. Changed it back to GSM / WCDMA / LTE Auto, and there I was back on LTE... I had to reboot my phone and that is when I noticed the same thing happened again!!! No LTE connection and had to first select GSM / WCDMA Auto to get 4G.. If I reboot with GSM / WCDMA Auto I get a data connection fine.. The problem only occurs when I have the Network mode on GSM / WCDMA / LTE Auto. Anyone else having this issue? Is there a fix?
Thanks
I would say it's a hardware problem with the phone I've had mine for a month i never touched network settings and the phone gets a better data connection then any phone I've ever had LTE pretty much all the time where other phones wouldn't maybe a factory reset would fix it worth a shot
The first V10 i got from T-Mobile had somewhat of a similar problem but with WiFi, it would connect but speed was horrible. And LTE isnt that great in my area either. I read around the forums and notice that many have done factory resets and that fixes everything. I did that and lowe and behold, it did. WiFi was fast again and LTE speed improved but still sucks....its my area, not the phones fault. For some reason, a reset helps.
However, I was still just 4 days in since I got my phone so I just went back and had them replace it. I just told them that the WiFi doesnt hold....they didnt really ask me tons of questions. I replaced it only because I am paying for the phone and me having to do a "fix" to make it work doesnt sound right...so I want a new good phone lol. The new phone worked fast from the get go...no reset needed.
Just got the V10 was having those wifi issues initially so brought phne back n exchanged for another 1 and this 1 workes fine but now Im having dropped call s inside my house ,verizon said no antenna issues i can bring phne back n replace for something else or another v10 but that is time consuming ,please anyone having drop d call s....I live Long Island NY so verizon overage is better then most carriers...INaNYmin...
I began having the exact same issue on Jan 16. Had the phone since Dec 25th, worked perfect. Then, all of a sudden, it began to lose LTE connectivity. At first I thought it was a down tower, but the problems persisted an eventually got much worse wherever I went. On a full charge the phone will behave normally for a while, but eventually it starts losing data connectivity altogether, cycling between 4G LTE, 4G, 3G, 2G, trying to connect. during this process the battery drains a lot, it never really connects, and sometimes calls and text messaging fail. Tried every network setting, soft reboot, hard reboot, safe mode, clear cache, factory reset....problem persists. T-mobile concludes it must be defective. We shall see. Awaiting a replacement.
Having the same issue. Looks like it's a common problem. Any fix for this yet?
I have a similar issue.
it always seems to find the LTE signal, however I have no data and the battery drains very quickly.
If I have it on GSM/WCDMA/LTE, it seems to have connection issues. However, the data will connect on GSM/WCDMA. Once I have data, then if I select GSM/WCDMA/LTE, and it will connect to LTE
It is a Tmobile version. I am using it on Bell (Canada)... however it works fine with Wind & Tmobile, with no issues.
I am hoping that this will be fixed with the Marshmallow upgrade.
anonimo6971 said:
I have a similar issue.
it always seems to find the LTE signal, however I have no data and the battery drains very quickly.
If I have it on GSM/WCDMA/LTE, it seems to have connection issues. However, the data will connect on GSM/WCDMA. Once I have data, then if I select GSM/WCDMA/LTE, and it will connect to LTE
It is a Tmobile version. I am using it on Bell (Canada)... however it works fine with Wind & Tmobile, with no issues.
I am hoping that this will be fixed with the Marshmallow upgrade.
Click to expand...
Click to collapse
Wind works on hspa not LTE. That's why it works. I've noticed that it works fine on hspa(4g) but when I put it on LTE(4gLTE) it works for a while then stops.
gslide said:
Wind works on hspa not LTE. That's why it works. I've noticed that it works fine on hspa(4g) but when I put it on LTE(4gLTE) it works for a while then stops.
Click to expand...
Click to collapse
For me, Wind works fine on GSM/WCDMA or GSM/WCDMA/LTE
With Bell, it will not connect on GSM/WCDMA/LTE.
However, with Bell, if I put it on GSM/WCDMA, it will connect. Then if I change it to GSM/WCDMA/LTE, it will connect to Bell's LTE.
Occasionally, it will lose its data connection... and then if I toggle between GSM/WCDMA & back to GSM/WCDMA/LTE, it reconnects. This seems to happen once every 2-3 days
I don't know why it does this. It was actually very frustrating until I figured that out. I almost dropped Bell because I was not able to connect on LTE for the longest time!!
I just keep my Wind plan for the US roaming (on Tmobile LTE down there)
anonimo6971 said:
For me, Wind works fine on GSM/WCDMA or GSM/WCDMA/LTE
With Bell, it will not connect on GSM/WCDMA/LTE.
However, with Bell, if I put it on GSM/WCDMA, it will connect. Then if I change it to GSM/WCDMA/LTE, it will connect to Bell's LTE.
Occasionally, it will lose its data connection... and then if I toggle between GSM/WCDMA & back to GSM/WCDMA/LTE, it reconnects. This seems to happen once every 2-3 days
I don't know why it does this. It was actually very frustrating until I figured that out. I almost dropped Bell because I was not able to connect on LTE for the longest time!!
I just keep my Wind plan for the US roaming (on Tmobile LTE down there)
Click to expand...
Click to collapse
Yup exact same issue with me and that's how I resolve it as well I'm with koodo and I lose LTE. I was going to warranty this phone but I think it's a common issue.
I just want to quickly point out that I am seeing the exact same issue on Virgin Mobile (Bell). I also noticed that the performance of the phone decreases drastically when it is connected through mobile data instead of WiFi. Anyone else sees this and knows how to fix it?
Lg v10 t mobile no connection
I'm having a similar issue I get a 4G LTE signal but if I make a call once I end it I loose all signal including the bars it wont let me text or call it says network not available and it will do that till I travel a few miles. I'm not in a dead zone because it does it in the heart of the city and on the buisest streets in Tampa Florida then it will come back and sometimes I won't get a signal for a entire day out shoe have any solutions?
anonimo6971 said:
I have a similar issue.
it always seems to find the LTE signal, however I have no data and the battery drains very quickly.
If I have it on GSM/WCDMA/LTE, it seems to have connection issues. However, the data will connect on GSM/WCDMA. Once I have data, then if I select GSM/WCDMA/LTE, and it will connect to LTE
It is a Tmobile version. I am using it on Bell (Canada)... however it works fine with Wind & Tmobile, with no issues.
I am hoping that this will be fixed with the Marshmallow upgrade.
Click to expand...
Click to collapse
Hey,
I'm using this phone in Canada too, on Telus. Ever since the OTA update 2 days ago I've been having data connection errors over the network. Did you find a fix?
---------- Post added at 01:59 PM ---------- Previous post was at 01:51 PM ----------
SasamiAdachi said:
I just want to quickly point out that I am seeing the exact same issue on Virgin Mobile (Bell). I also noticed that the performance of the phone decreases drastically when it is connected through mobile data instead of WiFi. Anyone else sees this and knows how to fix it?
Click to expand...
Click to collapse
I'm seeing this too, but it just started after my OTA update. So frustrating bc I love the phone.
I had a similar problem. With The latest software (,,v20c,,) With the LGUP Software I software put it back (,,v20a,,) . And it seems the problem disappeared. Last part of the modem software is not good. Even test elements. Sorry for my bad english for knowledge. LGUP software very simply . ( i have V10 960A Unlocked (Eu version) android 6.0 and T-mobile LTE )
If you need help:
http://www.androidsage.com/2016/04/12/update-t-mobile-lg-v10-android-6-0-marshmallow-h90120e-lgup/
http://forum.xda-developers.com/lg-v10/general/kdz-download-lollipop-kdz-10c-lg-servers-t3332348
I have permanent SIM unlocked phone .and I want to update to mm6.0
Present software :5.1.1 loollipop
Rooted :yes
It's mobile h901
Warranty:I bought imported phone unlocked so no warranty guide me safe way to update my phone
Thanks

3G not connecting

I recently purchased an Xiaomi Redmi Note 3 Pro phone (kenzo), it covers all the bands that rogers uses in my area in Canada, I believe.
https://en.wikipedia.org/wiki/Rogers_Wireless
I can connect with the phone on LTE, HSPA+ with no problem, if available. Sometimes, if I am in certain area's, the signal indicator drops to 3G .... it shows a decent signal, but no calls or data can go through.
In this example on the following chart, the first WCDMA connection,my phone only indicates 3G and I can not make a call or use data. When my call attempt is done, it goes back to LTE. Then I try again. Then for the second WCDMA connection on the chart, I am connected as H+, I can make a call and use data. Whenever this phone connects to CID 31072 the problem happens. When I connect to CID 31075, no problem. These are just examples of towers that I reach from my home. I get the same problem occuring other areas.
Any suggestions on what I need to change on my phone? Is my phone making a kind of 3G connection for some reason, which Rogers doesn't support? I have tried everything I can think of, Miui dev versions, CM13, LineageOS 14.1 etc, change Android Radio Menu settings, etc.
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I tried to block the use of band 2 with Network Signal Guru, but it seems to still use it when it finds it.
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I've had this problem since last few months, but since I'm always on 4g or 3g, I didn't bothered about it. But, now I'm using BSNL which doesn't have 3g coverage in ny college campus. And now this is bothering me since I can't even load my whatsapp messages or open any link. There's no problems on 3g and 4g networks. Also the 2g networks works great with calling but when I switch on my mobile data connection, it takes around 10-20secs to switch it on. Later, no packets are transferred from device and I can't use internet.
This problem started when I messed up while flashing and got my imei lost. I managed to get them back and have flashed the firmware multiple times since but this hadn't helped with anything. I had fp issues too but everything is solved except this no data connection on 2g.
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Thanks.

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