Database Users

3g Signal problem

Hello all,
I just got my N4 couple of days back. I have this problem where when i connect to a 3g network the signal keeps fluctuating. As in it connects to the network for some 5 seconds i ll have full signal and after a couple of seconds there is no signal it shows emergency calls only. This keeps happening repeatedly. But in the 2g network everything is fine. I figured this is a radio ( i had .48 ) problem and flashed an older radio ( .33 ) still the same. i m looking for a solution 2g network is way too slow. This never happened in my nexus s :/
P.S : i dint have a micro sim, so i got the sim cut into a micro sim, is this the problem do i have to buy a micro sim itself ?

sandy-achar said:
Hello all,
I just got my N4 couple of days back. I have this problem where when i connect to a 3g network the signal keeps fluctuating. As in it connects to the network for some 5 seconds i ll have full signal and after a couple of seconds there is no signal it shows emergency calls only. This keeps happening repeatedly. But in the 2g network everything is fine. I figured this is a radio ( i had .48 ) problem and flashed an older radio ( .33 ) still the same. i m looking for a solution 2g network is way too slow. This never happened in my nexus s :/
P.S : i dint have a micro sim, so i got the sim cut into a micro sim, is this the problem do i have to buy a micro sim itself ?
Click to expand...
Click to collapse
It's goes according to your carrier's cell coverage. If you're in area with low HSPA+ coverage then you will lose it and it will automatically switch to another frequency band. Big building can block cell coverage. Going underground or being in the basement will lower your data coverage. It has nothing to do with your sim card or your baseband.

scream4cheese said:
It's goes according to your carrier's cell coverage. If you're in area with low HSPA+ coverage then you will lose it and it will automatically switch to another frequency band. Big building can block cell coverage. Going underground or being in the basement will lower your data coverage. It has nothing to do with your sim card or your baseband.
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Click to collapse
I never had this problem with my nexus s, is it because nexus s doesnt have HSPA+ ?

Problem with Antenna?

I have a problem and think it is related to the antenna my Galaxy Pocket. My phone detects only 2G networks with strong signals. In the 3G signal is always around-85dBm 10 asu 113dBm 9asu Until then it goes back to 2G when 3G is on varies the signal level and is impossible to use mobile internet or make calls. Network modes that appear to me are HSDPA (which works very badly), EDGE and GPRS, tested with all operators in my country (Vivo, Claro, TIM and Hi). All with the same results in terms of signal. Already updated the stock ROM, installed customs and nothing resolved. I have a Defy Mini XT320 signal and this unit is very good the internet is fast. What do I do?

Assistance...
Luiz Paulo Damaceno said:
I have a problem and think it is related to the antenna my Galaxy Pocket. My phone detects only 2G networks with strong signals. In the 3G signal is always around-85dBm 10 asu 113dBm 9asu Until then it goes back to 2G when 3G is on varies the signal level and is impossible to use mobile internet or make calls. Network modes that appear to me are HSDPA (which works very badly), EDGE and GPRS, tested with all operators in my country (Vivo, Claro, TIM and Hi). All with the same results in terms of signal. Already updated the stock ROM, installed customs and nothing resolved. I have a Defy Mini XT320 signal and this unit is very good the internet is fast. What do I do?
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Click to collapse
Did you try the tecnical assistance?

[Q] Odd LTE Signal Swap Issues

I seem to be having the strangest LTE / 4G signal issues with the S4. I get 4G fine but when i leave a 4G area it drops to H+ or if the signal on 4G is weak it drops to H / H+ during this transition i am left without any signal for seconds to minutes as it switches.
Is there any way to find out what my LTE modem version is as i know my GSM one?
I am not too sure if this switch is normal to be lost without signal as GSM > H > H+ works fine and i still have signal

A|ex said:
I seem to be having the strangest LTE / 4G signal issues with the S4. I get 4G fine but when i leave a 4G area it drops to H+ or if the signal on 4G is weak it drops to H / H+ during this transition i am left without any signal for seconds to minutes as it switches.
Is there any way to find out what my LTE modem version is as i know my GSM one?
I am not too sure if this switch is normal to be lost without signal as GSM > H > H+ works fine and i still have signal
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Click to collapse
Check your baseband version and try to flash through ODIN the right one for your location

asbanoglou said:
Check your baseband version and try to flash through ODIN the right one for your location
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how do i do this? i can only see GSM modem not LTE. i know both versions maybe different

Mate the baseband of your phone is the same for both the gsm and lte configurations of your phone. If that won't work you can still check your carriers vpn configurations to see if there are correct
Sent from my GT-I9505 using XDA Premium 4 mobile app

i just searched forums :
http://forum.xda-developers.com/showthread.php?t=2525084
respider posted this:
**If you are having the old bootloader XXUB flash GSM_Modem_XXUEMJ5_and_LTE_Modem_XXUBMH1.tar file with odin by selecting phone.
**If you are having the new bootloader XXUD flash GSM_Modem_XXUEMJ5_and_LTE_Modem_XXUEMJ5.tar file with odin by selecting phone.
So this means that even if it says the LTE modem is different to the GSM modem you are saying that the help about the modem for GSM and LTE is in fact the same?

asbanoglou said:
Mate the baseband of your phone is the same for both the gsm and lte configurations of your phone. If that won't work you can still check your carriers vpn configurations to see if there are correct
Sent from my GT-I9505 using XDA Premium 4 mobile app
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are you still able to help?

A|ex said:
are you still able to help?
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From my knowledge you cant flash anything you like.You need to flash the correct modem for your region.Whats the version of your bootloader and your country so i can link you the correct file

I am experiencing the same thing, the switch from H+ to 4G doesn't drop the actual signal from the network whereas from 4G to H+ the signal drops leaving me no service at all for a few seconds.
I am starting to think that this is the normal behavior because it's like this since I got the S4. Oh and I have the latest modem for my country as well if that helps.
Perhaps someone with knowledge on how the modem works can chime in?
Sent from my GT-I9505 using Tapatalk

chickentuna said:
I am experiencing the same thing, the switch from H+ to 4G doesn't drop the actual signal from the network whereas from 4G to H+ the signal drops leaving me no service at all for a few seconds.
I am starting to think that this is the normal behavior because it's like this since I got the S4. Oh and I have the latest modem for my country as well if that helps.
Perhaps someone with knowledge on how the modem works can chime in?
Sent from my GT-I9505 using Tapatalk
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Click to collapse
Thanks chickentuna for your reply
Ok the 4G works perfectly fine in Hong Kong, London but as soon as i leave london and go to areas with 4G but low signal, i get the horrible loss of network until the phone does a search. I think its more network / phone related but would just need to learn to disable 4G out of the main cities.
asbanoglou thanks for trying you can flash any modem but whether or not it will work is another matter. I understand bootloader, different modems and csc i am looking for something a little more non generic. I first assumed this was the firmware / modem combo but after trying multiple ones this does not seem to be the case unless there is a long standing issue with the S4 and LTE.
As a future note to get the modem versions you dial *#1234# . More > About does not give you the full picture but thanks for those who tried to help

[Q] Help with 3g signal

I have compared the 3g signal level inside my office between my N9005 and my friends N750 and he seems to be always on H+ whereas my phone never goes beyond E. which leads me to believe there is an issue with my phone or modem.
Can someone please guide me how best to understand the root cause and fix this.

aayushjoshi said:
I have compared the 3g signal level inside my office between my N9005 and my friends N750 and he seems to be always on H+ whereas my phone never goes beyond E. which leads me to believe there is an issue with my phone or modem.
Can someone please guide me how best to understand the root cause and fix this.
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Click to collapse
N750 is 3G phone & yours is 4G, if u r in country were lte is not supported & u set auto WCDMA/GSM, phone may selecting 2G signals, try to select WCDMA only.

Network mode problem

Hello.
I have a note 3 n9005 and when the network mode is WCDMA/GSM or LTE/WCDMA/GSM, my phone stays on GSM often. 3G signal is good in the area, and when I check my friends' phones, I find out their phones are on 3G network but mine is on 2G.
When I choose WCDMA Only, phone registers on 3G network and works without any problem. But switching back to auto connect, cause the phone to register on 2G again after some time.
So is there any configuration that tells the phone to stay on 2G if 3G signal is weak?
Please help if you can.
Thanks in advance.
Sent from my SM-N9005 using Tapatalk

The cell tower does this by signal quality, and most of the time distance dictates quality. I myself have asked around for AUTO 3G/4G only, but it seems like a subject where nobody has done any research.
Does your 3G signal differ from WCDMA only compared to Auto mode? If so, try updating to a newer firmware, could be a modem/baseband issue that may has been fixed in the mean time.

Technically it should grab the highest network of the three. So LTE has priority over WCDMA, which has priority over GSM. So even if WCDMA has one bar, and GSM 4, it should grab WCDMA until it completely loses that signal.
Have you tested another SIMcard in your phone? It may very well be a SIM problem.

PlutoDelic said:
The cell tower does this by signal quality, and most of the time distance dictates quality. I myself have asked around for AUTO 3G/4G only, but it seems like a subject where nobody has done any research.
Does your 3G signal differ from WCDMA only compared to Auto mode? If so, try updating to a newer firmware, could be a modem/baseband issue that may has been fixed in the mean time.
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You say it is fault of the cell tower?
So why phones of my friends are ok about this issue and register on WCDMA?
I flashed 3 different lollipop ROMs but nothing changed. ?

ShadowLea said:
Technically it should grab the highest network of the three. So LTE has priority over WCDMA, which has priority over GSM. So even if WCDMA has one bar, and GSM 4, it should grab WCDMA until it completely loses that signal.
Have you tested another SIMcard in your phone? It may very well be a SIM problem.
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Click to collapse
Yes. That's exactly what I expect my phone to act about switching between network types.
I never tested another SIM in my phone. So I will check that as soon as possible. I will post the result. Thank you.
Sent from my SM-N9005 using Tapatalk