Losing signal after changing network mode.. or other actions - Galaxy S 4 Q&A, Help & Troubleshooting

Hello everyone i own a i9505 samsung galaxy s4. With a custom rom ( albe95 lollirom 8.0 ) my problem is that after i receive a call.. my signal drops from 4g to 3g.. and if i restart the phone.. i lose the signal.. that means. I can only use emergency calls only.. i can't search for a manual or auto network either... i also tried to switch from 4g to 3g in the options . And.i lose signal too.. to fix this i just put another sim in the phone then.. put my current.one back . And no the sim isn't the problem.. tested it with another phone. Thank you. And sorry for my bad english xD
Sent from my GT-I9505 using XDA-Developers mobile app

Does the same thing happen on a stock ROM?

Related

Galaxy S4 Gt-i9500 network problem

Hi All
i have GT-i9500 international . IMEI were changed to work on Turkish mobile networks.
it was working but after upgrading to 4.4.2 Network register but always : Emergency calls only.
i can call 112 normally .
when i go to mobile networks and search: i find my network : Turkcell. and when i choose it " Registered on network.
but : emergency calls only.
in service mode : IMEI CERTI:Fail
i downgraded to 4.2.2 but the same problem.
when i dial : *#0011# : UMTS: Home(CS+PS)
when i chose back from menu nothing happen.
i tryed all solutions in XDA and Others , tryed all modems. the same problem
i am using the firmware: I9500XXUBMH1_I9500OJVBMH2_I9500XXUBMG9_HOME.tar.md5
i cant install any other rom with Odin. just this.
service mode just stick on first page.
any idea to help please?
none
i cant help ,wait for ohther peolpe
* restore your efs backup
* It's very weird that you can not install other firmware. Remember that you can not do MG9 downgrade modem. Try install Kitkat with pitfile.
I used to root my Samsung S3 phone with different types of custom roms but most of them drained out my S3 bsttery fast. Due to this experience, I'm scared to root my Samsung S4 which is still in it's original rom and already updated to 4.4.2. When I looked at your screen shots, I kept wondering why your android OS was so high. I was thinking perhaps it was due to your phone being rooted? Is it because most custom roms drain battery faster than original roms? My S4's battery lasts much longer than my S3. I can put aside my phone with the wifi on and battery at 100% when I sleep. When I wake up, the battery is around 98%.
i have same problem anyone can help me plz
thanks in advance
any idea please
vbfather said:
any idea please
Click to expand...
Click to collapse
Hi mate,
The problem in the case above is that the phone lost its IMEI , if your case is the same and you do not have a efs backup , you will have to go to a service shop to have it fix , they need a tool like z3x or similar to fix it
http://forum.xda-developers.com/galaxy-s4/help/registered-network-t2810940/page3
thank u,
my IMEI is fine its repaired IMEI "cause here in turkey somehow we have to do that" but as written above i get no network after return it to 4.2.2
any idea?
thanks in advance

How to check if S4 i9505 has hardware failure or software problem

I have a s4 i9505 that has a problem of weak signals or no service and gives not registered to network when trying to call. But sometimes its shows full signal bars especially when i am on the roof top and at that time i can even make calls.
The problem is with the phone not the sim because when using the same sim with other phones i don't have an network connection problems at same point where S4 shows no service.
So what do you guys think is it a Hardware failure or software problem.
terminator1983 said:
I have a s4 i9505 that has a problem of weak signals or no service and gives not registered to network when trying to call. But sometimes its shows full signal bars especially when i am on the roof top and at that time i can even make calls.
The problem is with the phone not the sim because when using the same sim with other phones i don't have an network connection problems at same point where S4 shows no service.
So what do you guys think is it a Hardware failure or software problem.
Click to expand...
Click to collapse
Hi mate ,
A little more info , what rom you have , what modem , network settings.....
MAX 404 said:
Hi mate ,
A little more info , what rom you have , what modem , network settings.....
Click to expand...
Click to collapse
Hi ,Its on 4.4.2 official rom with same version of modem
Sent from my GT-I9505 using XDA Free mobile app
terminator1983 said:
Hi ,Its on 4.4.2 official rom with same version of modem
Sent from my GT-I9505 using XDA Free mobile app
Click to expand...
Click to collapse
Hi mate ,
Most of the times this is modem related if you were in a custom rom i would recommend to flash a new rom or even a different kernel , in you case i would reflash stock rom again to make sure is not software related
No it's not on a custom rom. Its on stock 4.4 Hong Kong version.
Sent from my GT-I9505

[Q] weak or no signal when selected "WCDMA ONLY" G900H india

Hi folks.
I recently bought a refurbished S5 G900H , INDIA
it came with pre-installed kitkat 4.4.2, but without using anything on the mobile i flashed a custom rom .
everything was fine until i discovered that there is a problem with the network .
whenever i try to switch network to WCDMA only i get a notification stating "NO SERVICE".
GSM mode works perfectly fine , i can make calls and use internet but with a slow speed,
the same SIM works absolutely fine with other phone with same network setting at the same location .
so i tried flashing all the stock FIRMWARE available for G900H INDIA from www.sammobile.com . but the issue is stll the same .
also tried flashing different modem available but no help .
some time i get a very weak 3G or H+ network but that too in a ground or open space but not in my home .
i have tried all the SIM from carriers available but the issue is still the same .
i can check my IMEI and baseband .
what else i can do ??
PLEASE HELP ?/:crying:

Emergency calls only on note 4 N916K

Hi guys, please help me. actually I have a strange problem: I have a korean note 4 N916K and since 1 month I have this strange problem of emergency calls only with all Simcards . Or IMEI is correct, wifi works perfectly, only this problem of emergency calls only when I set network mode to LTE/3G/2G automatically or 3G/2G automatically or 3G only. I tried everything I know, reflashing original roms from Samsung(android 5.0.1, 5.1.1, 6.0.1), many custom roms ..., ... No way, no solution. The only thing that I tried to make my phone working as phone is just put the network mode in setting to 2G, not 3G, nor 4G, just 2G. With 2G only as network mode, the emergency calls only disappeared BUT now I can't connect to 3G and 4G anymore. Please please help me guys, I really need to use at least 3G
Thank you in advance guys.
Sent from my SM-N920C using XDA Free mobile app
shabbat said:
Hi guys, please help me. actually I have a strange problem: I have a korean note 4 N916K and since 1 month I have this strange problem of emergency calls only with all Simcards . Or IMEI is correct, wifi works perfectly, only this problem of emergency calls only when I set network mode to LTE/3G/2G automatically or 3G/2G automatically or 3G only. I tried everything I know, reflashing original roms from Samsung(android 5.0.1, 5.1.1, 6.0.1), many custom roms ..., ... No way, no solution. The only thing that I tried to make my phone working as phone is just put the network mode in setting to 2G, not 3G, nor 4G, just 2G. With 2G only as network mode, the emergency calls only disappeared BUT now I can't connect to 3G and 4G anymore. Please please help me guys, I really need to use at least 3G
Thank you in advance guys.
Sent from my SM-N920C using XDA Free mobile app
Click to expand...
Click to collapse
Did you fix the problem? Got the same issue here on my note 4 N910H
sarry86 said:
Did you fix the problem? Got the same issue here on my note 4 N910H
Click to expand...
Click to collapse
Nope, i didn't. It made me so mad and angry. No one can solve it so i broke it and i bought a new phone. I hope you will find solution for yours if you have. Good luck
shabbat said:
Nope, i didn't. It made me so mad and angry. No one can solve it so i broke it and i bought a new phone. I hope you will find solution for yours if you have. Good luck
Click to expand...
Click to collapse
Oh that's too bad :crying:
Hi.
I have a custom rom
If you have your phone still
I can help you
My gmail
[email protected]
---------- Post added at 09:42 AM ---------- Previous post was at 09:39 AM ----------
my gmail
[email protected]
Please send me a message
I have the same issue in my 910c.
It stopped working out of nowhere, november 2016, I was using the same stable rom for months at the time, wasn't due to a bad update.
Tried everything to fix it, even downgraded to kitkat stock rom, restored IMEI backup, nothing seems to work.
I'm only able to use it as a phone in 2g, it's painful.
Checked my IMEI already, it's not blocked, serial number is correct, CSC is correct, region is correct...
Anyone passed through this and managed to fix it?
Check out this post
https://forum.xda-developers.com/note-4/general/tutorialhow-to-flash-n910c-rom-korean-t3663053

No 4g after installing multiple rom on galaxy note 4 N910k

Hi,
I have lost 4g after installing some roms.There is only 3G.When I force to LTE only it shows no service,but 3G works perfectly.I have flashed ltefix.zip, downgrade to stock rom even there is no 4G.
Please help help, I'm just boring of 3G speed .
Khokamoni said:
Hi,
I have lost 4g after installing some roms.There is only 3G.When I force to LTE only it shows no service,but 3G works perfectly.I have flashed ltefix.zip, downgrade to stock rom even there is no 4G.
Please help help, I'm just boring of 3G speed .
Click to expand...
Click to collapse
Try to change some setting from *#*#4636#*#* menu
there is nothing coming by dialing this code.But 4G is enabled in service mode.can you help with another way?

Categories

Resources