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Foreign Carrier Data Connection Issues [Solved]

Hey guys, I recently unlocked and rooted my Infuse 4G from ATT
Im currently living in Panama and using CLARO, I got the correct APN settings,and everything, and the internet works.. "Sometimes" I have gone to the store to obtain help incase it was something on their network, but there is nothing wrong with the network, Next I tied Replacing my sim into my friend who just got the Galaxy S 2, And it worked fine.
The problem In my case seems to be That I cannot maintain a stable Data Connection, It keeps dropping and activating back randomly, if I reboot the phone it will bring data back to it 75% of the time.. but only for a short period.. maybe 5-10 mins at most, then it disappears again.
Im just wondering if anyone that is using the Infuse 4g in a foreign country has or is experiencing a similar issue, or if anyone can explain why this is happening and if there is a way to fix it.
Im waiting for Infused to come back up to put gingerbread on the phone and hopefully fix this issue.. but I fear it will require more.

To answer my own question I found a solution and testing a second
**Just want to add when I say toggle Softkey, I mean the button to the far left at the bottom**
Solution#1 to get Infuse 4G DATA working on Claro Network Panama:
Goto phone type *#*#197328640#*#*
Goto Debug-->PHONE CONTROL-->NETWORK CONTROL-->BAND SELECTION-->GSM BANDS-->GSM 1900-->Toggle Soft Key-->back-->toggle soft key-->END
This will give you a stable EDGE connection on the Infuse 4G
I will post a possible 3G fix after I have tested the setting for more than a day.

OK so Im pretty confident I got the 3G working now, if you experience this issue of losing Data on the network in other foreign countries to USA/CANADA this might help you out aswell.
**Just want to add when I say toggle Softkey, I mean the button to the far left at the bottom**
So again goto phone dial *#*#197328640#*#*
Goto DEBUG SCREEN-->PHONE CONTROL-->HSPA CAT CONTROL-->HSDPA DISABLE-->Toggle soft key-->Back-->toggle soft key-->END
If you followed my steps to gain access to EDGE you must do this also
DEBUG SCREEN--> PHONE CONTROL --> NETWORK CONTROL -->BAND SELECTION --> AUTOMATIC --> TOGGLE SOFT KEY --> BACK--> TOGGLE SOFT KEY --> END
so that you can access the other bands for 3G
Hope this helps people.
Also Would like to Add that Im using INFUSED v2.0.4 http://forum.xda-developers.com/showthread.php?t=1220088
and I switched to the ROGERS MODEM http://forum.xda-developers.com/showthread.php?t=1173704
With these settings applied.

The other way around this is if you install the Infused ROM it'll give you the option to manually lock to the network. The AT&T ROM has ATT roaming partner preference built in... super annoying, but is what it is. I had issues where putting in a foreign SIM I could only attach to networks AT&T had roaming agreeements with even though it wasn't an ATT sim and the non-ATT stock ROM solved it for me.

I saw network locking also in the debug menu, is that what you are talking about?
I cannot find any network locking within the normal menus.. if there is could you guide me to it please.

well I tried the lock via the debug menu.. and did not work when I enabled HSDPA.. maybe the issue isnt a foreign carrier issue or combination of a foreign carrier or just the fact that its a carrier that offer 4G but only on contract.
I was speaking to a friend last night, and he said when he was in the US he was experiencing a similar problem with ATT and the people at ATT said the phone will experience these issues on networks that have the ability of 4G or the HSDPA+ higher speeds since we know that its not real 4G.. so the phone attempts to connect or do whatever it does to obtain those higher speeds of HSDPA+, but is being refused by the network because you need to be on contract or have it enabled.. which then in turn causes it to disconnect all together from the data network.
So it made sense to disable to the HSDPA in the scenario.. I might add that by doing this on CLARO you do not get the full 3G experience its slower from about 2Mbit down to .50 Mbit but its still better than edge. and the HSUPA works fine with a 2Mbit Upload.
Im going to obtain a contracted SIM today with 4G enabled.. and remove all the steps I listed above to confirm that this is actually case.
I will post my results when I get the chip.

[FIXED] - [Q] [JellyBean] How to switch on 4G?

I recently installed the JellyBean ROM for my A2 and changed few settings in the power manager after which I am unable to get 4G connectivity. I always see Edge in the status bar. I've tried re-trace my steps in the power manager but havent been able to turn on 4G yet.
Any guidance on how I could get my 4G back ?
----- UPDATE ----
I had to flash the same ROM again onto my phone and now its functioning properly. Still don't know the root cause but will report again if I see it happen again.
Thanks
Dhanvi

kapiladhanvi said:
I recently installed the JellyBean ROM for my A2 and changed few settings in the power manager after which I am unable to get 4G connectivity. I always see Edge in the status bar. I've tried re-trace my steps in the power manager but havent been able to turn on 4G yet.
Any guidance on how I could get my 4G back ?
Thanks
Dhanvi
Click to expand...
Click to collapse
Which JellyBean ROM? Please remember to be very specific as to the conditions surrounding the problem you're having!
I'd first try to go into Settings/ Below Data Usage tap 'More...'/ Mobile Networks
and make sure that 'Use only 2G networks' isn't checked.
Also, which carrier are you on? (I know most are on AT&T, but I'm on Straight Talk so I ask)

Alperon said:
Which JellyBean ROM? Please remember to be very specific as to the conditions surrounding the problem you're having!
I'd first try to go into Settings/ Below Data Usage tap 'More...'/ Mobile Networks
and make sure that 'Use only 2G networks' isn't checked.
Also, which carrier are you on? (I know most are on AT&T, but I'm on Straight Talk so I ask)
Click to expand...
Click to collapse
Thanks for your reply. I'm on the "MagicMod-Jellybean-Experimental" Atrix ROM on ATT.
The "Always use 2G" is unchecked which means that it should use 4G when available. Which bought me to the next section where I could search for network providers. When I searched for networks, most of the times my phone fails to find ATT in the list of available networks. I do have 4 bars on my phone though. I dont see the network provider name in the status bar so I dont know where it is connected currently.
My current hypothesis is that my phone is unable to connect/register to the ATT network and so I dont get 4G speeds.
Does that make sense?
Dhanvi

kapiladhanvi said:
Thanks for your reply. I'm on the "MagicMod-Jellybean-Experimental" Atrix ROM on ATT.
The "Always use 2G" is unchecked which means that it should use 4G when available. Which bought me to the next section where I could search for network providers. When I searched for networks, most of the times my phone fails to find ATT in the list of available networks. I do have 4 bars on my phone though. I dont see the network provider name in the status bar so I dont know where it is connected currently.
My current hypothesis is that my phone is unable to connect/register to the ATT network and so I dont get 4G speeds.
Does that make sense?
Dhanvi
Click to expand...
Click to collapse
Just so you know A small H by your signal bar means 4g. I am on AT&T and all I have to do is uncheck those boxes and reboot and data and MMS works fine
From my locked down superchargedV6 1.425ghz A "What tha duce?"

daavvis said:
Just so you know A small H by your signal bar means 4g. I am on AT&T and all I have to do is uncheck those boxes and reboot and data and MMS works fine
From my locked down superchargedV6 1.425ghz A "What tha duce?"
Click to expand...
Click to collapse
Yep. I'm aware that a H is 4G. I see an 'E' next to the signal bar. I did have an 'H' right after I installed my ROM but since today I'm only seeing 'E' .
I'll try flashing the CM10 ROM and check if that fixes my issue. If not, I'll copy over an apns-config.xml from an ICS install and replace my current one with that just in case.

try changing network mode by an awesome app called "Network" by phillip
in market .... it is simple & best option

shardul.phatak said:
try changing network mode by an awesome app called "Network" by phillip
in market .... it is simple & best option
Click to expand...
Click to collapse
Thanks for the tip. I'll try that. Looks like a reflash (of the same ROM) solved the problem for me though. Its back to 'H' for me. I still haven't tried to flash CM10.
Thanks for your help guys.

3G data disable while on roaming

Hello,
I know there is a thread for this in Galaxy Note section, but i feel i need to share this for OPO community.
I'm using OPO v33 rom. I live in Mumbai and have a 3G vodafone postpaid corporate connection.
Recently i have been to my native mysore on few occasions, and everytime i have seen the 3G data getting disabled even when the data connection settings are enable on roaming.
I never faced this issue on my nokia lumia 920 which perfectly latched onto roaming and 3G data was available.
On roaming, with OPO, the data gets disabled and i dont get a specific "E" or "H" sign with + noticafion.
I only have the signal bars with small R icon on top of the bar.
Please let me know if there is a workaround for this.
I have also seen this issue on v25 rom aswell.
Note: i have tried setting connectivity to automatic in mobile networks.. and also tried to select the specific Vodafone network. both didnt solve this issue.
Another interesting thing while on roaming: my nokia 920 recognised 2 networks for vodafone.. one with 2G, 3G and another with only 2G. and i could select the first one .. and 3G was getting enabled without any issues.

i think that E and H as well as H+ is only something you can geti n your own country. When roaming, it's always the default for that service prodiver in the country that you will get.

Network Mode LTE reduce signal

Hi,
I'm having some really annoying issue with my phone, when I select the Network Mode to GSM/WCDMA (auto connect) it is working perfectly fine but as soon as I change to LTE/GSM/WCDMA (auto connect) I lost 75% of my signal.
Of course without activating LTE I cannot access the 4G Network which is a bit annoying.
I also tried to flash the latest modem for my phone g920i but it didn't solve the problem.
Any idea would be greatly appreciated.
Thanks

Maybe it is caused by your carrier?

Check mine... its normal

Same issue with my S6 on Telus in Canada. Loses cell signal when stet to LTE or wcmda at times.

That's normal
massacreur75010 said:
Hi,
I'm having some really annoying issue with my phone, when I select the Network Mode to GSM/WCDMA (auto connect) it is working perfectly fine but as soon as I change to LTE/GSM/WCDMA (auto connect) I lost 75% of my signal.
Of course without activating LTE I cannot access the 4G Network which is a bit annoying.
I also tried to flash the latest modem for my phone g920i but it didn't solve the problem.
Any idea would be greatly appreciated.
Thanks
Click to expand...
Click to collapse
This is because cellular repeater is a bit far from you try this app https://play.google.com/store/apps/details?id=com.staircase3.opensignal to see where it is. You will notice this happens also when you enable LTE/GSM/WCDMA and there is no LTE signal your phone will go in 3G mode (or H,H+, etc..) and the signal indicator will change. Sorry for my bad english if i made mistakes, I hope I was helpful.

Lg g4 h810 works 2G only

Hi,
I bought this phone Lg G4 h810, it shows AT&T logo whenever i boot it and the problem is despite of network mode on lte/wcdma/gsm/auto it always runs on2G internet speed and shows E sign.
I am from india and many service providers are still not offering4G internet service. But this phone doesn't even runs on wcdma. My previous phone lenovo was nicely running on wcdma and always showed the sign H.
My cellular operator is idea cellular and i had a word with them, they sent me settings and all and help me input the settings manually too, but nothing worked.
I checked even the frequencies, idea cellular is offering UMTS B1(2100) and UMTS B8(900 gsm). I checked this on LG website and these bands are compatible with the phone i bought, but still i can't get anything more than2G. Why so?
Plus there is one more problem, when i switched it on for the first time it showed update available And when i tried to update, it showed error and now always there's an icon on top left corner of phone saying couldn't install system update. I tried restarting and updating the device many times, but it's still the same.
Any help is much appreciated.
Thanks in advance.

Have you put your Company APN?

Yes i did, the company executive even helped me to manually save the settings to run the internet in a 3G mode. But all efforts in vain.

Did you solve the issue?

Anything new? I have the same problem.

I have this problem too

Try hidden menu with *#546368#*810# and under Field Test menu / Modem settings if there is VoLTE on/off chose VoLTE and restart. I have done that and my phone starts working with 4G. Don't forget to set up good APN if it's not automatically set by network provider.

scytalemk said:
Try hidden menu with *#546368#*810# and under Field Test menu / Modem settings if there is VoLTE on/off chose VoLTE and restart. I have done that and my phone starts working with 4G. Don't forget to set up good APN if it's not automatically set by network provider.
Click to expand...
Click to collapse
Hi
Under VoLTE there is another entry named "Session" and in there
RPR(on/off) switch
I enabled it and restarts but it is again on 2g
Anyone further on this issue??

I have this problem too
I was flash the stock firmware,custom firmware customizing the build.prop,changed the settings in the engineering menu *#546368#*810# disconnected volte,changed LTE bands forcibly. Nothing helps,dont work 3G LTE - 2G only(. I realized that I need to re-flash (change) the original QCN file for H810 and re-register IMEI , but I can not find QCN it freely available.

Hello there, i had the same issue. The fix that worked for me was searching for network manuallly and reconnecting again to my carriers LTE network. Worked as a charm. The issue maybe was a brutal handover as I had been travelli g from a city to another one 200 km away. So somehow I had been disconnected from the LTE network and left stranded in the 2g one. Try it it should work