Database Users

Please help, 3G/hspda:9/ problem.

Hello. Below is a link to a problem I am having:-
http://community.o2.co.uk/t5/Androi...4-1-2-update-via-kies-HELP-Please/td-p/371734
Basically, having a problem with 3g or lack of it! It use to work fine but since flashing to 4.1.2 it doesnt work at home. It works 5 miles up the road and 5 miles down the road but not here, even though here I have the strongest signal! Were I am here, I use to connect to hspda:9 but now its just hspda. My phone is connected but there is no bandwidth. I have flashed, reflashed, wiped cache, factory reset and flashed back to a older version and still it doesnt work. Does my phone use a different bit of hardware/driver/modem to use hspda:9? Down the road about 2 miles away, it changes between hspda and hspap which I have never seen. O2 say there is no network problem in my area. I presume my phone csnnot be faulty as it works in other areas but the place where I historically get the strongest signal on hspda:9 doesnt work anymore? Flashed and wiped so many times I really dont know what to do now.... Help!

Wow, 66 views and no help.Tough crowd!

try an earlier modem file and double check the APN settings are correct

Try with different SIM card
You will known if its related with your phone or your network.

Looks like you have changed your modem to me .
jje

I have checked my apn settings and they are correct. I have put my wifes vodafone sim card in my phone and it works perfectly. It works on other masts on o2, just not on the one were I live! It is either a problem with o2 mast/signal where I live OR my mobile phone doesn't support hsdpa:9 anymore! It connects to hsdpa but doesnt have any bandwidth. I have flashed back to 4.1.1 o2 firmware and that didnt work. Then flashed 4.1.1 btu firmware and that didn't work so flashed back to 4.1.2 o2 firmware.
I was originally on o2 firmware but then flashed a btu update and changed the csc to btu. I did this on 4.04 btu and it was fine. Upgraded to 4.1.1 btu and that was fine, flashed to 4.1.2 btu and that is when I noticed the problem. The problem is I dont normally use 3g at home as I use wifi so I noticed the problem after I upgraded to 4.1.2 but it could have stopped working before then but if I hadnt used 3g for a while i wouldnt have noticed it. Fed up with it now!

Reading your link with all the things you've done to try and solve this, it definitely looks like an O2 problem. Especially if you flashed a stock BTU.
If there replacement sim doesn't solve the problem, the only other thing you could try is disabling fast dormancy.
It may fix the issue with your home mast (emphasis on the may), but it will increase the battery drain where 3g works for you.
Sent from the App that Time Forgot.

Well.... FINALLY I got someone who cared at o2. Been on the phone for 40 minutes and then spike to a engineer and they have opened a case and going to investigate as it they think its a 3g fault on the mast! 8 days and 6 phone calls it has taken but hopefully it will be sorted! Ended up on a o2 csc now though instead of btu but reset my phone so many times lately it doesnt take that long anymore to set back up!

[Q] i9505 stuck out of service

Hi,
I have a weird problem with my S4.
At work I have some areas with really bad coverage so sometimes the phone can stay for a few minutes (or even say 1h) out of service.
This is all normal. The coverage sucks, the building is weird, not problem here.
The problem is that when I go outside where the signal is normally full it does not register back to the network.
Even more it does not even go to "emergency only mode". On a few occasions I arrived back home (10Km + drive) until I realized people can't call me because the phone is out of service.
What is even weirder is the fact that on some occasions, even though the (no service) (/) sign is displayed mobile data works just fine.
My previous iPhone did something similar too - it took a while for it to recover signal after exiting the coverage black spots but never more than maximum 5 minutes.
To me it looks like a radio modem issue and maybe this is aggravated by the fact that my carrier uses the same 2100MHz frequency for both Data and Voice.
I would like to know if any of you have experience anything like this or if there is some app available that can monitor what's happening.

what network and firmware you on and wich s4 variant:thumbup:
Sent from my GT-I9505 using xda premium

I9505XXUBMEA I9505OXXBMF1
It's Europe standard i9505.
Network is Digi.Mobil Romania - but I doubt it's relevant since it can't get even emergency only (other networks).

so... any idea?

Android needs to work on it's notification. No Service and the reception bars only gauge voice coverage. You can test this out by using Service Mode to do a PS Only (data) attach instead of the standard PS + CS (voice) attach. It'll say no service, but data will be fine.
Emergency only, is when there is coverage from other operators but not yours. No service, means your way off the grid.
I've noticed the issue you describe and it's only on some firmwares. Try a newer one and see if you still have the same issue. But you might notice a drop in your battery life because your phone will be scanning all the time. If you're happy with no coverage at work, best to just turn it off and then turn it on when your outside.
Best option is to tell your operator about the lack of coverage. There's someone in charge of stats who get's beaten every time you drop a call. You'll get extra attention if you've got other businesses around you, so let them know that too.

Thanks for the reply.
I am already on the latest firmware and I noticed the same behavior on the firmware before this one.
Unfortunately I can't try out other modem versions (from other FW packages) as that would void my warranty.

avoid said:
Thanks for the reply.
I am already on the latest firmware and I noticed the same behavior on the firmware before this one.
Unfortunately I can't try out other modem versions (from other FW packages) as that would void my warranty.
Click to expand...
Click to collapse
but...what about reboot phone? i know isnt funny but until u find a problem u can just reboot ur phone while u are going out from ur office...or just try to enable and disable airplane mode

Of course reboot works but I am looking for a solution, not a partial workaround.
The most annoying problem is that if I forget to reboot it when I leave work it will not recover network connectivity even if I am in areas with very good coverage, areas where you would expect your phone to work.
It looks like when it decides to give up it does not try again. It is very weird that it also drops the signal from other networks (the "emergency only") even if it's well in their coverage areas. I guess I will have to switch phones... Even if this issue was present for the iPhone too it never took more than a few minutes for it to recover on its own. And I'm not an apple fan

Just to do some brain ecercise...do u keep in power save when u are out of signal ? Its possible that disable check after few tries
Sent from my GT-I9505 using xda app-developers app

It's not in power save. I only use that function in case of battery emergency.

Same problem here
Hello, I have the EXACT same problem here. I am in Argentina.
Now, I've been in the USA for a few weeks, visiting, and while my phone was roaming, I didn't have a single problem with my phone.
Since I came back, 3 days ago, I haven't had any problems in Argentina, either.
Is it possible that something got activated when the phone was registered to another company? (it was AT&T i believe)
If that's the case... maybe you can try putting a sim card of another company and see if you still have the problem?
Please let me know if you still have the same problem or if you got it solved. I would love to know something more scientific about all this.
I don't know if this is relevant, but my compass is off by about 30 degrees. Maybe my phone is defective?
THANKS FOR ALL YOUR HELP YOU CAN GIVE ME WITH THIS
---------------------
avoid said:
Hi,
I have a weird problem with my S4.
At work I have some areas with really bad coverage so sometimes the phone can stay for a few minutes (or even say 1h) out of service.
This is all normal. The coverage sucks, the building is weird, not problem here.
The problem is that when I go outside where the signal is normally full it does not register back to the network.
Even more it does not even go to "emergency only mode". On a few occasions I arrived back home (10Km + drive) until I realized people can't call me because the phone is out of service.
What is even weirder is the fact that on some occasions, even though the (no service) (/) sign is displayed mobile data works just fine.
My previous iPhone did something similar too - it took a while for it to recover signal after exiting the coverage black spots but never more than maximum 5 minutes.
To me it looks like a radio modem issue and maybe this is aggravated by the fact that my carrier uses the same 2100MHz frequency for both Data and Voice.
I would like to know if any of you have experience anything like this or if there is some app available that can monitor what's happening.
Click to expand...
Click to collapse

Hi I have similar issue,
My phone says its out of service or no signal or no network also I checked my sim card in other phone in the same place and it is fine. The i9505 model in ireland meteor provider was running ok until deicided to give a try to another network operator, when I changed the sim card it didnt only catch up the signal from new network provider but also it refuses to catch the old network provider. Funny thing is that I am receiving 3G but no signal bars and no service sign is beeing displayed. I am running latest official BTU (UK) firmware, the phone was never rooted, altough I had to remove the simlock and instal unbranded firmware. The phone worked fine with the newest updates for a month and now I am facing this trouble.
No factory resets nor installing same radio (couple of times) have helped. Also I used odin to instal same firmware (as it has locked bootloader) so I cannot revert back to other stock firmwares, but still no joy.
hope that someone faced the same problems and describe how to solve this issue. thanks

Data Connection problem (4g) (weird issue)

Hi,
I recently updated my phone to android 4.4.2. (official firmware KOT49.I9505XXUFNB9)
All went well, wifi works like it should, sms is good and calls too.
The problem i have is that my data connection (4g) is acting weird.
When i want to use my own connection on my phone like for Google play, facebook, games, web surfing, speedtest, ...., It all goes slow or does not connect at all.
But when i share this connection through USB and/or wifi hotspot there are no problems. Smooth as butter. No latency issues, timeouts, just as a 4G connection should be.
Thank you for helping and reading :good:

Thx for the 'help'.
Some news :
- Mobile connection goes from 4 bars to 1 if i switch from (WCDMA/GSM) to (LTE/WCDMA/GSM)
- Modem is good (flashed a few times, even other modem versions, but nothing works)
- I have a realy hard time to connect to any data network atm (3g and 4g).
- Modem and firmware version are the same as friends of mine (same country and provider) (Belgium, Mobistar)
- i had 4.2.2 before. Wanted to reinstall the firmware to get it all official again but the firmware was nowhere to be downloaded so i took a 4.4.2 and now everything is messed up.
The realy weird thing is that the data connection was the best at the standard 4.2.2 that was on the phone. Every other rom that i tried had a worse connection. (i tried ALOT of roms).

Dial *#1234# and attach screenshot.

Here you go.
Just attached a 2nd img from Samsung kies. Says (ORX). DOn't know what country that is, and i don't know what country code i sohuld take since belgium doesn't have its own code it seems. (Could this be the problem?)

[Q] Mobile data problem

I've got some problems with mobile data on my Note 4. I've bought unbranded phone in shop unrelated to any mobile provider. It's Snapdragon version (N910F).
I've got prepaid service, without LTE available (if that's important). The problem is that every now and then mobile data simply stops. There is still H or H+ sign in notification bar, and upload arrow blinks. but when i try to open web page or send message through viber, wattsup it acts like there is no network. Then i have to wait for about 30 seconds or manually turn mobile data off and then on again for internet to start working again.
I've tried changing APN settings, changing network type, but the problem is still there.
I've read some similar issues with Note 3 and SGS5 users, and some problems with modem versions, but i couldn't find anything from note 4 users
And this problem is very frustrating on phone like Note 4
Is there anything else i could try?

Mate i have exact same problem

I don't know if this is relevant, if your apn settings has a proxy and port values, try to delete it and let the proxy and port be blank. I had issues previously with data getting stuck while using proxy setting.
Sent from my SM-N910C using Tapatalk

I also loose data signal and on calls people cant hear me properly.. doesny always happen. Ill try thanks

Also experiencing this with Tmobile UK.

Also have this exact same problem with the unbranded SM-N910H, H+ but no internet all of a sudden. I also sometimes lose the whole signal (Emergency Calls Only) so I have to reboot or turn airplane mode off and on to get it working again. I asked some people and they told me it's a coverage problem with the network provider. IDK if it's true.

No ahmadmob its the phone although i have n910u i have exact same problems as u!! I thinks its modem hopefully gets solved soon im in Australia using prepaid only 3g/h+

Ausboy 2011 said:
No ahmadmob its the phone although i have n910u i have exact same problems as u!! I thinks its modem hopefully gets solved soon im in Australia using prepaid only 3g/h+
Click to expand...
Click to collapse
Glad it's not a carrier specific issue.
Guess I'll wait for an official fix or for other radios to become available.

I rang samsung australia few weeks ago and they had no idea than again when do they ever!? Lol so looks like we will have to wait buddy

Some common suggestions:
1- Swap the SIM card into another phone to see if the problem persists?
2- If the problem is due to Note 4, you may need to update your firmware/baseband to the latest one (if one is available, or you have to wait until Samsung release it), or try another firmware (from another model) or custom ROM.

Tried already mate sims fine updated reflashed stock rom and still same problem.. hopedully update comes soon

I just tried sim card from another carrier, and for now, everything looks fine.
I'll go ask for a new sim from my carrier, or switch my number to another one.

Sorry for digging, didn't want to make a new topic.
I'm here with the same problem. Did any of you find solution for it (other than switching to different carrier). I'm on Play in Poland and i find mobile data problematic mostly in roaming (free roaming with every carrier in Poland). For example on t-mobile or plus i find my up arrow constatnly blinking and H switching to H+ and again. Problem is even worse with 2 or less signal bars. I'm thinking of changing sim cars to new one, but on my note 2 everything works perfectly fine.

I thought I noticed a slight improvement after the final KitKat update, may have been a placebo effect though.
In general it's still bad, much worse than my HTC M7, same network, same location etc. It seems to be particularly bad when travelling at speed e.g. on the train I get full bars but only 1 arrow flickering.
Upgraded to Lollipop a couple of days ago and finally rooted, doubt this will make a difference but will be able to report during my commute tomorrow.
In summary: The HSDPA modem on my phone is rubbish.
P.S. Previous phones I've owned came with options for different modems, I'd often flash these to improve performance, where are they for the Note 4?

I think they're not available yet, at least on lollipop...

Mine is completely fixed after a few updates i get 4g+ here excellent reception

Medved77 said:
I thought I noticed a slight improvement after the final KitKat update, may have been a placebo effect though.
In general it's still bad, much worse than my HTC M7, same network, same location etc. It seems to be particularly bad when travelling at speed e.g. on the train I get full bars but only 1 arrow flickering.
Upgraded to Lollipop a couple of days ago and finally rooted, doubt this will make a difference but will be able to report during my commute tomorrow.
In summary: The HSDPA modem on my phone is rubbish.
P.S. Previous phones I've owned came with options for different modems, I'd often flash these to improve performance, where are they for the Note 4?
Click to expand...
Click to collapse
Nope. No Change.

Ausboy 2011 said:
Mine is completely fixed after a few updates i get 4g+ here excellent reception
Click to expand...
Click to collapse
Could tell more how did you fix your problem?

All fixed!
I can confirm that after the lollipop 5.0.1 update on my SM-N910H all my mobile data problems/mobile network drop outs are solved!. 3 days without any problems now.
Edit: maybe it had something to do with Radio and it got fixed after it got updated along with the lollipop update package?

Guys, here in my country Bulgaria, many of us owners of SGN4 have the same issue and wilth Lollipop also. I have noticed that with KitKat the problem was more frequent than Lollipop but it is still there. We have tried Polish Lollipop and now the official Bulgarian Lollipop but the problem still exists. I hope somebody will tell me which ROM you have installed (oficial) so I could share it with my fellow citizens. Thank!

[Q] Wi-fi issues

About a month ago I noticed that my wi-fi is working weird. It is connected, but I can't use the Internet. Looking at the wi-fi icon I can see that it is sending data to my router, but it is not recieving anything back. I basically have the arrow going up, indicating upload, but no arrow down, indicating download. After a few minutes (or after restarting wi-fi) it goes to normal for some time and then it stops working again. I'm currently on optimised CM12.1, but it doesn't matter which ROM I use. My router works fine. I checked with another phone while my s4's wi-fi wasn't working. I was considering updating baseband and modem, but I wasn't sure which one to use. I'm in Poland and my carrier is Mobile Viking, but they use Play infrastructure (or T-Mobile, if play is unavailable). It isn't anything that would make me change my phone, but it is a bit annoing.

*bump*

killermenpl said:
About a month ago I noticed that my wi-fi is working weird. It is connected, but I can't use the Internet. Looking at the wi-fi icon I can see that it is sending data to my router, but it is not recieving anything back. I basically have the arrow going up, indicating upload, but no arrow down, indicating download. After a few minutes (or after restarting wi-fi) it goes to normal for some time and then it stops working again. I'm currently on optimised CM12.1, but it doesn't matter which ROM I use. My router works fine. I checked with another phone while my s4's wi-fi wasn't working. I was considering updating baseband and modem, but I wasn't sure which one to use. I'm in Poland and my carrier is Mobile Viking, but they use Play infrastructure (or T-Mobile, if play is unavailable). It isn't anything that would make me change my phone, but it is a bit annoing.
Click to expand...
Click to collapse
It's like you said. The only thing you can try is changing your modem.
Do you have a stable connection on other wifi networks?

I have no way of checking other networks (living in a small town with no public wi-fi). Which modem should I use? I'm in Poland nad I bought my S4 in a store (not from any carrier)

killermenpl said:
I have no way of checking other networks (living in a small town with no public wi-fi). Which modem should I use? I'm in Poland nad I bought my S4 in a store (not from any carrier)
Click to expand...
Click to collapse
There is no best modem. You have to try it for yourself. I would suggest taking lollipop modems, but you have to be on a lollipop bootloader for that.

If I am on lollipop rom, does that mean that I have lollipop bootlader? When I bought my phone it was on android 4.4.2

Since lollipop my wifi has been terrible on my i9505 stock rooted. My iOS and windows devices are rock solid but sgs4 has crap connection strength. On previous devices the radio with the upgrade was normally to blame but I'd welcome any suggestions. Does cm12 use the same radio as stock?