[Q] Signal issues with Samsung Galaxy S4

ujameel@hotmail.com · May 21, 2013

Hello Everyone,

I recently purchased a Samsung Galaxy S4, but instead of enjoying my new toy , I have been busy troubleshooting a weird problem.

I am using a lyca mobile sim in my phone (lyca mobile here in Australia uses telstra as the provider) . Well the issue here is I get proper signals for a while and when I lose connectivity or lost signal usually all mobiles re-register themselves over the network. In my case I have to either re start my phone or turn my aeroplane mode on and disable it again to get back my signals.

Have tried everything I could

1. Force reboot
2. enable data roaming
3. Manually selecting Network
4.Changed my SIM card( though havent tried another provider as telstra has very good coverage here)

Appreciate if anyone can help me here or sud it be a problem with handset then will proceed with replace ment

Thanks

NBB823151 · May 21, 2013

ujameel@hotmail.com said:
Hello Everyone,

I recently purchased a Samsung Galaxy S4, but instead of enjoying my new toy , I have been busy troubleshooting a weird problem.

I am using a lyca mobile sim in my phone (lyca mobile here in Australia uses telstra as the provider) . Well the issue here is I get proper signals for a while and when I lose connectivity or lost signal usually all mobiles re-register themselves over the network. In my case I have to either re start my phone or turn my aeroplane mode on and disable it again to get back my signals.

Have tried everything I could

1. Force reboot
2. enable data roaming
3. Manually selecting Network
4.Changed my SIM card( though havent tried another provider as telstra has very good coverage here)

Appreciate if anyone can help me here or sud it be a problem with handset then will proceed with replace ment

Thanks

I have the S4 on the UK "3" network and comparing the signal with that I enjoyed on the S3 it is unfortunately worse.
For example I have noticed that at least 20 % more of the time I get the dreaded circle with line through saying no service and it seems very slow to reconnect, although it does.
Of course when i do get a decent signal the data speed is way better and yet to experience 4g for a few months at least.
Hope that helps a bit

ujameel@hotmail.com · May 21, 2013

NBB823151 said:
I have the S4 on the UK "3" network and comparing the signal with that I enjoyed on the S3 it is unfortunately worse.
For example I have noticed that at least 20 % more of the time I get the dreaded circle with line through saying no service and it seems very slow to reconnect, although it does.
Of course when i do get a decent signal the data speed is way better and yet to experience 4g for a few months at least.
Hope that helps a bit

Atleast you get back your signals with out constantly having to monitor and re start ur phone. I have to restart my phone once I see the dreaded circle.

cold22 · May 21, 2013

What version of Galaxy S4 are you using the 4G (i9505) or the 3G (i9500)?
If i9505, then is it the Australian version? or you import it, if you're using either the i9500 try setting up the appropriate APN from here.

http://ausdroid.net/apns/

ujameel@hotmail.com · May 21, 2013

cold22 said:
What version of Galaxy S4 are you using the 4G (i9505) or the 3G (i9500)?
If i9505, then is it the Australian version? or you import it, if you're using either the i9500 try setting up the appropriate APN from here.

Well its GT-I9500 model bought from kogan I am sure this must have been imported from Hong Kong. Will the APN still work?

cold22 · May 21, 2013

ujameel@hotmail.com said:
cold22 said:

What version of Galaxy S4 are you using the 4G (i9505) or the 3G (i9500)?
If i9505, then is it the Australian version? or you import it, if you're using either the i9500 try setting up the appropriate APN from here.

Well its GT-I9500 model bought from kogan I am sure this must have been imported from Hong Kong. Will the APN still work?

Click to expand...

Click to collapse

Actually try this one instead.

In the Menu go to Settings -> Wireless & networks-> Mobile networks -> Access Point Names -> add New APN and key the following settings

Internet APN Settings:
Name : Lyca AU
APN : data.lycamobile.com.au
Proxy : <Not Set>
Port : <Not Set>
Username : lmau
Password : plus
Server : <Not Set>
MMSC : <Not Set>
MMS Proxy : <Not Set>
MMS Port : <Not Set>
MCC : 505
MNC : 19
Authentication type : <Not Set>
APN Type : <Not Set>

ujameel@hotmail.com · May 21, 2013

cold22 said:
ujameel@hotmail.com said:

Actually try this one instead.

In the Menu go to Settings -> Wireless & networks-> Mobile networks -> Access Point Names -> add New APN and key the following settings

Internet APN Settings:
Name : Lyca AU
APN : data.lycamobile.com.au
Proxy : <Not Set>
Port : <Not Set>
Username : lmau
Password : plus
Server : <Not Set>
MMSC : <Not Set>
MMS Proxy : <Not Set>
MMS Port : <Not Set>
MCC : 505
MNC : 19
Authentication type : <Not Set>
APN Type : <Not Set>

Click to expand...

Click to collapse

Well as soon as I added the APN my internet data activated by itself, this was another problem I was facing where I was not able to get mobile dta even after turning on the data services. for my signal to be trust worthy sud I keep the data services turned on always?

ujameel@hotmail.com · May 21, 2013

cold22 said:
ujameel@hotmail.com said:

Actually try this one instead.

In the Menu go to Settings -> Wireless & networks-> Mobile networks -> Access Point Names -> add New APN and key the following settings

Internet APN Settings:
Name : Lyca AU
APN : data.lycamobile.com.au
Proxy : <Not Set>
Port : <Not Set>
Username : lmau
Password : plus
Server : <Not Set>
MMSC : <Not Set>
MMS Proxy : <Not Set>
MMS Port : <Not Set>
MCC : 505
MNC : 19
Authentication type : <Not Set>
APN Type : <Not Set>

Click to expand...

Click to collapse

Unfortunately even after adding the APN the signal issue not resolved. Lost my connectivity and still waiting for the signals to get back. Looks like have to restart it again. Though adding APN resolved my packet data issue

mattyg2004 · May 23, 2013

I have a similar issue

I've switched my phone to GSM only and its been working ever since.. Not Ideal but it may help trace the issue

grmek · May 23, 2013

I had a similar issue the other day when roaming in a different country in Europe. In my home network, I've never had that issue so far.

When roaming on a particular foreign network (Orange SK), the circle would show up and stay there until reboot (30+ mins), despite being in a very well-covered area (major city center). This has happened consistently over the course of 3 days. Manual selection of the network didn't help at that point, only reboot seems to cure the issue.

Not sure what the deal is, but it seems I'll have to keep an eye on the phone when roaming.

G.

svscorp · May 30, 2013

I have completely same issue.

SGS4 with Lycamobile sim-card. Netherlands. GT-I9500 (imported)

Always in Roaming. And always loosing a signal as author mentioned.
I place another microsim - works all day OK. Put back my LycaMobile - the same.

I have an assumption the problem is because I crop sim-card into a micro-sim by myself (But in all phones this manually cropped sim does works).

Well I haven't found a solution yet, but I have ordered a new microsim from Lyca (already cropped). And today I gonna test it.

Will get back to you with the results

Darkkef · May 30, 2013

I Have this same issue, im in colombia with tigo as my provider the problem is that im in zones with good signal strength and suddenly i lose all off the signal ...have a i9500

cmd512 · May 30, 2013

This is starting to look like a widespread problem...

Sent from my GT-I9500 using Tapatalk 4 Beta

svscorp · May 30, 2013

No, new lycamobile microsim has the same problem.

Do you guys think it can be fixed by samsung?

The second thing I noticed. That when my SGS4 loses signal, sometimes it couldn't found ANY network.
'Network mode' is disabled and pressing 'Network operators' - it displays: 'Searchig', then sometimes I can see list of operators, sometimes not.

If I see networks, I choose 'Lycamobile', signal got back with 100% signal, and then randomly looses again.

Darkkef · May 30, 2013

Ok noticing now it happens on certan spots of my house and wokplace.. in those spot i lose all signal and never get it back... have to restart havent tried turning off mobile data and then back on.
no root but flashed the cwm through odin.. the one that autoroots but havent roted yet...cause no triangle away yet..
I9500UBUAMDE is the firmware

lambstone · May 30, 2013

Now I had the same issues sorta anyway on my i9505. But I've managed to improve the signal strength and stability by flashing a network specific modem. For instance I'm on Optus network so I've flashed the carrier modem

Sent from my Galaxy S IV

svscorp · May 31, 2013

lambstone said:
Now I had the same issues sorta anyway on my i9505. But I've managed to improve the signal strength and stability by flashing a network specific modem. For instance I'm on Optus network so I've flashed the carrier modem

Sent from my Galaxy S IV

Naaah, flashing the carrier is really annoys, especially when my SGS4 loses signal randomly several times in hour

Btw, I've checked my Lycamobile-NL microsim at colleague's Samsung Galaxy Note II. We didn't have enough time to wait until signal will lost, but what we noticed immediately - signal in Roaming! So I have an assumption this is pair problem - samsung + lycamobile (in NL). But it is weird, cause lycamobile works perfectly on my old HTC DHD...

svscorp · Jun 3, 2013

Nobody wants to solve an issue. Samsung tells - it's mobile operator related problem. Mobile operator said this it smartphone issue.

I've checked new microSIM on different SGS and SGNote's - the same problem.

It is good I can switch my mobile operator keeping my phone number. What I actually did. But sad that I should switch from Lyca ;\

cmd512 · Jun 3, 2013

In my case, I can say for sure it's a Galaxy S4 issue. I've used two separate SIMs on two separate networks (AT&T in the US & Chunghwa in Taiwan), and they both see "network disconnects randomly and comes back" issue.

Key point: These are the exact same SIMs I used in my S3 previously and never saw a single disconnect.

Jimmybuckrogers · Jun 5, 2013

Same issue here, Galaxy S4 i9505, on UK Orange (EE), bought in May 2013. There is no signal in my office and after leaving I have to restart my phone to get the signal back.

[Q] Signal issues with Samsung Galaxy S4

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