Database Users

Problem in making calls - works only if GSM 900 band is selected

Hi all
I am having a problem lately in making/receiving calls. The only easy the problem is solved is by using the band GSM 900. If the band selection option is set to determine automatically then I face the problems although the network is full.
The band selection is changed using *#2263#.
Note that the phone was working fine with the default band settings until one day I lost my emi and then had the samsung service centre restore it.
Have been having toys problem since then.
Any solutions?
Sent from my GT-I5801 using XDA App

i have a very similar problem. my issue also started a few days ago. only, i haven't tried using that frequency band that you mentioned. the thread that i started here didn't get too many replies, but i googled stuff and i found out that the issue is with the data connection.
try disabling the data network mode whenever you're not doing it. that has solved the problem with me so far. but, if you do find a way where you can use the data network mode and make calls easily, let me know also please.
thanks.
EDIT : i think you mean IMEI. and i didn't lose it. how did you manage to lose yours? i thought flashing was safe. which version of what ROM are you using now? and which were you using before?

Yes IMEI was what i meant. Did something stupid to loose my IMEI. And yes flashing is quite safe and does not touch your IMEI.
Was using DDJP2 when this issue started. And have flashed many roms but the issue still remains.
And i dont use any data network so my data network mode is also in disconnected mode.
And to further describe my problem.. when i make a call to a nokia phone the call almost gets connected and the nokia phone also gets lighted on with the small lock sign coming up... but the call does not connect completely ....
The only solution i could find (after weeks of digging) is to default the band selection to GSM 900... but i am sure that there should be a better solution for this.

I was using using eclair when my issue started. then i upgraded to froyo DDJP2 and my issue went away :/
but it has started again off late, no matter which ROM i use. I tried doing what you suggested, that is to set the default band to GSM 900. but that only for incoming calls. as in, i can receive all calls properly but my outgoing is still faulty. it just dials and then the "call ended" screen comes with the dial and message buttons. and when the data network mode is activated (it is by default. are you sure yours is switched off?) for me, my calls barely ever go through. there is a significant improvement when it is deactivated.
I'm looking for a better way out too.. I'll let you know if someone helps me out either. Good to know i'm not the only one here who has the issue.

Yes am sure.. the network data mode is always deactivated for me here.
Yes hopefully we can get some better solution here.

I lost my IMEI..samsung repaired my imei...nut im not getting calls or sms....even out going calls also.........plss help mee

i am havin a similar problem , sometimes (a lot ot times) people call me and my phone seems to be closed to them , but it works normally :S , that problem started when i flashed the phone and it remained after i flashed a lot of roms (even after factory reset) , and i cant understand if its a software issue or a device problem..
i would appreciate any help

and now i'm facing the issue even when the 900 band is selected (but data network mode is activated, which i don't want to disable because of whatsapp and ebuddy and gmail and tTorrent)
wondering if any recognized developer could help us out with this problem..

[Q] network problem (very strange)

Hi guys, first of all i made searches and etc. and found nothing, this is very strange issue,
i have an s4 (I9500) and cell network is not working well. in E mode (i mean 2G) all internet voice and texts are working as should be.
in combined mode, if internet open then no network, or sometimes E with data but no 3G anyway. when internet disabled all is good.
in WCDMA mode, if internet is open, then nothing no internet, no voice no text. when internet disabled all is good again.
strange thing is i can use 3G very different way.
check 3G or combined mode first
make a call
after connected call open network data ( internet)
in a few seconds i have 3G internet. but if call ends no data again and after while no network either.
for troubleshooting in 3G mode before signal lost i see H or H+ sign on my phone but only up arrow shows no down arrow i think that mean 2 thing
1- i send a request to carrier but no returning
2- i cant send a request but phone try to send.
it was the same in 4.4.2 firmware, now i have 5.0.1
i try to patch modem with other firmwares modem files but i could find only 4.4.2 modem files. and tried all of them but no luck
so i want to use 3G mode, my phone has warranty but glass broken and in my country it is avoid warranty.
i have no box jtag or z3x box only have cwm mode and odin with usb. so is there any solution to my problem.
my phone info :
Android version: 5.0.1
Baseband version: I9500XXUHOD4
KERNEL VERSION: 3.4.5-4727708
Build number: LRX22C.I9500XXUHOD4
stock firmware with no patches just root.
my origin country where i bought phone is Turkey.
i will be greatfull if you guys could help me..
Thank you in advance.

mami17 said:
Hi guys, first of all i made searches and etc. and found nothing, this is very strange issue,
i have an s4 (I9500) and cell network is not working well. in E mode (i mean 2G) all internet voice and texts are working as should be.
in combined mode, if internet open then no network, or sometimes E with data but no 3G anyway. when internet disabled all is good.
in WCDMA mode, if internet is open, then nothing no internet, no voice no text. when internet disabled all is good again.
strange thing is i can use 3G very different way.
check 3G or combined mode first
make a call
after connected call open network data ( internet)
in a few seconds i have 3G internet. but if call ends no data again and after while no network either.
for troubleshooting in 3G mode before signal lost i see H or H+ sign on my phone but only up arrow shows no down arrow i think that mean 2 thing
1- i send a request to carrier but no returning
2- i cant send a request but phone try to send.
it was the same in 4.4.2 firmware, now i have 5.0.1
i try to patch modem with other firmwares modem files but i could find only 4.4.2 modem files. and tried all of them but no luck
so i want to use 3G mode, my phone has warranty but glass broken and in my country it is avoid warranty.
i have no box jtag or z3x box only have cwm mode and odin with usb. so is there any solution to my problem.
my phone info :
Android version: 5.0.1
Baseband version: I9500XXUHOD4
KERNEL VERSION: 3.4.5-4727708
Build number: LRX22C.I9500XXUHOD4
stock firmware with no patches just root.
my origin country where i bought phone is Turkey.
i will be greatfull if you guys could help me..
Thank you in advance.
Click to expand...
Click to collapse
1. Dial *#1234#and tell me what appears.
2. Install this APP and add some screenshots.

Okay i did what u want i hope u could help me.

mami17 said:
Okay i did what u want i hope u could help me.
Click to expand...
Click to collapse
Check the SIM Card and change it for one new.

Joku1981 said:
Check the SIM Card and change it for one new.
Click to expand...
Click to collapse
I already tried that one but no luck at all

mami17 said:
I already tried that one but no luck at all
Click to expand...
Click to collapse
Factory reset your device then. This look like hardware problem anyway

Joku1981 said:
Factory reset your device then. This look like hardware problem anyway
Click to expand...
Click to collapse
I already tried that too, factory reset, clean to install New rom, and no luck...
Looks like to me software problem too but i cant fix it.. Thats why i choose title as strange i dunno what to do now..

I think im having the exact same problem, it has been like this for the past 3 months. Unable to find any solution. Tried pretty much everything. The problem started 3 weeks after I installed cyanogenmod. Flashed back to stock rom but it didnt fix it.
Let me try to explain it:
I ONLY got internet + a normal cell signal when im on GSM mode.
As soon as I switch to WCDMA - WCDMA/GSM or LTE/WCDMA/GSM I dont have any internet or a cell signal, leaving me with the only option which is GSM, but that gives me Edge internet which is really slow.
The things I tried so far:
- Different ROMS
- Stock ROM
- Updated my APNs manually and automaticly
- New sim card
- Opened my S4 to check for any damage or water damage, everything looks fine!
I tried my SIM card in my friends phone, I got perfect 4g then.
Im starting to believe its a hardware problem

strukel said:
I think im having the exact same problem, it has been like this for the past 3 months. Unable to find any solution. Tried pretty much everything. The problem started 3 weeks after I installed cyanogenmod. Flashed back to stock rom but it didnt fix it.
Let me try to explain it:
I ONLY got internet + a normal cell signal when im on GSM mode.
As soon as I switch to WCDMA - WCDMA/GSM or LTE/WCDMA/GSM I dont have any internet or a cell signal, leaving me with the only option which is GSM, but that gives me Edge internet which is really slow.
The things I tried so far:
- Different ROMS
- Stock ROM
- Updated my APNs manually and automaticly
- New sim card
- Opened my S4 to check for any damage or water damage, everything looks fine!
I tried my SIM card in my friends phone, I got perfect 4g then.
Im starting to believe its a hardware problem
Click to expand...
Click to collapse
When turn of data in 4g or 3g Mode can you see signal? Can you make a call?

strukel said:
I think im having the exact same problem, it has been like this for the past 3 months. Unable to find any solution. Tried pretty much everything. The problem started 3 weeks after I installed cyanogenmod. Flashed back to stock rom but it didnt fix it.
Let me try to explain it:
I ONLY got internet + a normal cell signal when im on GSM mode.
As soon as I switch to WCDMA - WCDMA/GSM or LTE/WCDMA/GSM I dont have any internet or a cell signal, leaving me with the only option which is GSM, but that gives me Edge internet which is really slow.
The things I tried so far:
- Different ROMS
- Stock ROM
- Updated my APNs manually and automaticly
- New sim card
- Opened my S4 to check for any damage or water damage, everything looks fine!
I tried my SIM card in my friends phone, I got perfect 4g then.
Im starting to believe its a hardware problem
Click to expand...
Click to collapse
İf your answer no try this solution http://forum.xda-developers.com/showthread.php?t=2192025 ı suppose your Phone I9505 and we don't have same problems.

mami17 said:
When turn of data in 4g or 3g Mode can you see signal? Can you make a call?
Click to expand...
Click to collapse
Nope I just tried it, I dont have a signal and I cant make a call

Phone shows network but no data connection or calls possible

I have purchased a used Note 4. It was already rooted so i went ahead and installed Nameless ROM and the appropriate bootloader_modem.
Now, i have no data connection and can't make any calls. Even if the bars show that there is coverage. WiFi works fine.
My first idea was to revert it to stock so i downloaded the N910GDTU1COJ3_N910GXSA1COJ3_XSA stock rom and flashed it in Odin. Full wipe and cahce clean after the flash.
I am still facing the same problem that the phone doesn't have data or voice service. Any ideas what else to try or what could be the problem?
TIA

Anyone?

for me...i always lost signal... i dont know why...910f

Same issue
Went back to stock ROM a few months ago, but this has just started with me. 4 days and not able to connect to any data service.
Tried new Sim and manual network selection, just refuses.

dosada said:
I have purchased a used Note 4. It was already rooted so i went ahead and installed Nameless ROM and the appropriate bootloader_modem.
Now, i have no data connection and can't make any calls. Even if the bars show that there is coverage. WiFi works fine.
My first idea was to revert it to stock so i downloaded the N910GDTU1COJ3_N910GXSA1COJ3_XSA stock rom and flashed it in Odin. Full wipe and cahce clean after the flash.
I am still facing the same problem that the phone doesn't have data or voice service. Any ideas what else to try or what could be the problem?
TIA
Click to expand...
Click to collapse
Hi @dosada, i guess I.have the same problem as you, I can't connect to any 3G or 4G anymore. Now, I only can use 2G and Wi-Fi. so try to put network mode to 2G only, because if you put network mode in 4g or 3g or 4g/3g/2g automatic or 3g/2g automatic you will always end with Emergency calls only or no service. I already asked help for that but no one can solve it. I already tried everything I know but no way, no one can solve it. So just courage and let us know if you get solution somewhere.
I think that it is the last time that I use or buy a Samsung phone, they really suck recently. it's better to spend our money to buy other phone than Samsung, they lost the trust of their customers. They were number one but now...puffff...
Sent from my SM-N910S using XDA Free mobile app

Very weird signal problems....

Hi all, tearing my hair out here and can't find an answer anywhere about my issue... Basically my. Phone displays emergency calls only,even though I have signal. My cellular data is gone. I have found that if I select 3g only my data and signal comes back and all works fine again. As soon as I select lte 4g the emergency calls only starts again and I can't use my phone. Phone was rooted and working fine. I have reset to factory settings today and then set my phone up again(which resulted in me losing all my documents and photos as I could not back it up...) problem still there though. I'm. Gutted as I've only had the phone a couple of months. Please if someone could help me out here.
Sent from my SM-G935F using Tapatalk

JON35Y said:
Hi all, tearing my hair out here and can't find an answer anywhere about my issue... Basically my. Phone displays emergency calls only,even though I have signal. My cellular data is gone. I have found that if I select 3g only my data and signal comes back and all works fine again. As soon as I select lte 4g the emergency calls only starts again and I can't use my phone. Phone was rooted and working fine. I have reset to factory settings today and then set my phone up again(which resulted in me losing all my documents and photos as I could not back it up...) problem still there though. I'm. Gutted as I've only had the phone a couple of months. Please if someone could help me out here.
Sent from my SM-G935F using Tapatalk
Click to expand...
Click to collapse
Have you consider that it can also be from your network provider

I haven't really as it seems to work ok with 3G. Seems more software or hardware. Was hoping someone had seen this before?!

Can't get signal on GRA-UL10

Hi, I need urgent help as I can't get a signal on my P8. I'm in the UAE using Etisalat and my phone is not getting a signal on C185B385 or Arrow ROM. It just happened without me doing anything. I've tried wiping data and it has not fixed the problem. I do have IMEI but it's always on emergency calls only. I don't think I was blacklisted my carrier either as I have transferred my SIM to my old LG G3 and it's receiving 4G signal.
Please help, thank you!

Many people are having a no signal problem with the huawei p8, atleast with 3g. Seems like there is no solution yet.
My 4g works and i can text. But if i try to make a call or change to 3g and 2g only I get no service.

melonsmasher100 said:
Many people are having a no signal problem with the huawei p8, atleast with 3g. Seems like there is no solution yet.
My 4g works and i can text. But if i try to make a call or change to 3g and 2g only I get no service.
Click to expand...
Click to collapse
The thing is, 4G doesn't work, nor does 3G. Huawei sure is great with their phones *obviously sarcasm* If I get a new phone, it surely won't be Huawei and will probably never be.
Although, I have discovered a workaround in which you put the SIM card in Slot 2 and set 4G to Slot 2, then put it back in Slot 1 and leave the 4G option in Slot 2. Sadly, it's only 2G but hey at least it works and saves a bit of battery with only 2G. But I need 4G, so I put my SIM in my good old G3.

Well my phone only has 1 slot so for me that wont work ._. (Gra-l09) I actually was lucky enough to win a huawei p10 that i will receive in 2 weeks. Hope i don't get the same problem. If I do I will never buy from huawei again either.

melonsmasher100 said:
Well my phone only has 1 slot so for me that wont work ._. (Gra-l09) I actually was lucky enough to win a huawei p10 that i will receive in 2 weeks. Hope i don't get the same problem. If I do I will never buy from huawei again either.
Click to expand...
Click to collapse
Woah that's great! Let's just hope your P10 won't have a problem because my cousin won a Huawei Nova Plus from a photography contest hosted by Huawei. And the phone reboots when he uses GPS lol. Again with Huawei's "great" engineering.

Try to reflash the stock rom and the stock recovery.

Tried to do that. Doesn't seem to work though. It also happened to me without me doing anything. Used fromfuture-home rom for a couple of weeks. Then calling gradually stopped working so I could only call sometimes. I thought it was my carrier so I made so many calls to them but they said nothing was wrong. Also tried to change sim. Now it does not work at all. I found a quick fix that worked for a while which was putting the phone in the freezer for a while. Feels like build 3xx for some huawei p8s causes a hardware fault. Everyone who has got this problem got it at about the same time.
Right now I'm using cyanogenmod flashed on top of 100% clean b321

I have the same problem in my P8: i have internet and wifi but i can`t make any call nor receiving
I flashed stock rom C900B370 without results
MelonsMasher, does cyanogenMod solve the problem?
Thanks a lot

My Huawei P8 (HUAWEI GRA-UL00) doesnt pick up 3G signal as well. One of the SIM slots is set at GSM only and it works perfectly fine. The other SIM slot is set at LTE/WCDMA/GSM auto but it can only access 4G only. When i try to call, it fails. When i set my SIM slot at WCDMA/GSM auto, it says 'Emergency Only'. I can be able to access data but no calls because, the system must fall back into 3G inorder to make a call.
What is the solution to this? It happened for me few times in the past and I have to hard reset the phone to get it back to normal. But then, all my contacts, pics and whatever i stored in my phone including email and social networking sites will be lost as well meaning I have to start all over again. Is there any way to solve this and not getting rid of what is stored in the phone already?
Thank you.
I may have to change my phone to other Brands if this issue is not solved.
Concerned User.