Mobile Network keeps going on & off - Samsung Galaxy S8+ Questions & Answers

I just clean installed Alexis 5.2 & I had mobile network, but didn't set up Mobile Data/APN since I was using WiFi. I'm currently in Mauritius, an island near South Africa & the csc BTU always worked fine for me for custom roms on my s6.
But after installing the configuration message for apn from my carrier, mobile network keeps going on & off.
I forgot to backup efs in twrp.
I'd be very grateful if someone helps me please. This is stressing me out

Fullmetal Jun said:
I just clean installed Alexis 5.2 & I had mobile network, but didn't set up Mobile Data/APN since I was using WiFi. I'm currently in Mauritius, an island near South Africa & the csc BTU always worked fine for me for custom roms on my s6.
But after installing the configuration message for apn from my carrier, mobile network keeps going on & off.
I forgot to backup efs in twrp.
I'd be very grateful if someone helps me please. This is stressing me out
Click to expand...
Click to collapse
Did you try resetting your network and or full phone?
Have you considered reinstalling your CSC?

JeffDC said:
Did you try resetting your network and or full phone?
Have you considered reinstalling your CSC?
Click to expand...
Click to collapse
Alexis 5.3 fixed it

Related

Mobile data problems

Hi guys. I am from Romania(Vodafone-unlocked device). This week,on monday I installed France 5.1.1 on my S6. I have a problem with my 3g/4g connections, my phone only connects to 2g. I tried switchng network modes,rebooting,airplane mode,everything,but it still won't connect
2g only
Caproid said:
Hi guys. I am from Romania(Vodafone-unlocked device). This week,on monday I installed France 5.1.1 on my S6. I have a problem with my 3g/4g connections, my phone only connects to 2g. I tried switchng network modes,rebooting,airplane mode,everything,but it still won't connect
Click to expand...
Click to collapse
Hi guys i have the same trouble!only 2 g work!The other mode block totally the signals !I have french rom and i was in 5.0.2 AOE3 rom and i update to 5.1.1 but dont work!Someone can help please?
Please delete
You can try flashing this stock Romanian Vodafone 5.1.1 ROM:
www.sammobile.com/firmwares/download/49280/G920FXXU2POFC_G920FVFG2BOF2_CNX/
fliptroniks said:
You need to go into the firmware of the phone or call a provider who can walk you through it. There is a way to change it after you update the mobile data. Your almost there its just one more step and then you reset your phone.
Click to expand...
Click to collapse
To go into the firmware ? Can you detail?

[Q] Mobile data disabled when after installing pre-rooted stock ROM

Hello There,
My phone is an L55U(China Unicom variant of D6633). I have been using D6633 non-rooted stock rom for some time. and received lolipop OTA. It was okay but somehow it had problems like not able to read pictures in sdcard etc.
Recently I switched to pre-rooted stock ROM following the procedures shown in
http://forum.xda-developers.com/z3/general/stock-firmware-23-1-1-e-0-1-customized-t3084544
When using this rom, the google apps constantly crash, so I switched to another stock rom shown in
http://forum.xda-developers.com/z3/general/d6603-5-0-2-flashable-stock-23-1-0-690-t3056361
(D6633_23.1.1.E.0.1_HK_SuperSU_XZDR2.8.20 thanx to @alvinlim28)
But this time an even more irratating problem occurs. The phone mobile data is disabled no matter how I try. I tried to swap the simcards and it seems only the data roaming can be used.(my two simcards are local Ortel D and roaming ChinaMobile, as I now live in Germany).
Also tried restarting, limiting the simcard in GSM only mode but neither worked. Other functions are fine so far. I am now dowloading the pre-rooted RU ROM but it may take a while. Later I may test with that one.
plz help. thx
Maybe you're using a Rom from another country/carrier. think HK means hong kong in this case. You need to find a german one.
lol1rfs said:
Maybe you're using a Rom from another country/carrier. think HK means hong kong in this case. You need to find a german one.
Click to expand...
Click to collapse
Problems solved after I did these procedures all over again and switched to the customized generic stock lolipop. It turned out that the stock HK ROM somehow couldn't properly retrieve the mobile data network settings.
Interesting.... Have you manually added the APN data for your mobile carrier?

GALAXY S6 DUOS (G920FD)IMEI & MOBILE DATA Problem

Need your help!!!!!!
When I buy that phone S6 Dues (G920FD) default was 5.0.2 and I can use 3G without any problem. After that there is one oTA update and my 3G has gone. After that I have decided to use Stock ROM but no improvement on mobile data. I have to select GSM for both the SIM and 2G is there with slow connection. Whenever I select WCDMA/GSM for any one of the SIM, immediatley it shows "Emergency calls only" and no mobile data. Wired problem but is there any solution for that? Same IMEI shows in *#06# and back side of S6. But in IMEI.info and mobile info app shows invalid IMEI. Dont know what is the problem.
Try flashing stock 5.1.1 ROM via odin specific for your country.
http://www.sammobile.com/firmwares/database/SM-G920F/
roydok said:
Try flashing stock 5.1.1 ROM via odin specific for your country.
http://www.sammobile.com/firmwares/database/SM-G920F/
Click to expand...
Click to collapse
OK. My first stock rom was from Sammobile and the issue was the same on that. Now I am using |ROM|★ARCADIA v1.0★|►5.1.1 XXU2BOFJ◄|JULY.25.15|★ and issue has no improvement.

Note 5 SM-920P bought in China

I bought a Note 5 which worked fine with China Unicom, the phone was 5.1.1 so I decided to manually update the phone to mm. After the update the phone can make calls, but it can't pick up data signal. I've tried everything from flashing the modem back to 5.1.1 (which was the one that worked, originally) but no dice. I was wondering if anyone had a solution to this. The phone isn't rooted and its constantly trying to activate its voice and data, even though the voice all ready works.
Enter the APN settings manually for your network. The same happened to me on my Unlocked N920P. I entered the APN (Airtel India) and deleted all the others. On upgrading, it will automatically pick up the Sprint APNs. So add a new APN and enter your setting for your network manually.
shantanil said:
Enter the APN settings manually for your network. The same happened to me on my Unlocked N920P. I entered the APN (Airtel India) and deleted all the others. On upgrading, it will automatically pick up the Sprint APNs. So add a new APN and enter your setting for your network manually.
Click to expand...
Click to collapse
Thanks so much for your response. I've tried this method, but still no dice :/
hi
NavaKing0208 said:
Thanks so much for your response. I've tried this method, but still no dice :/
Click to expand...
Click to collapse
Hello
I bought Note 5 920P from china I use this mobile in Turkey bu we have some problem with this phone
for exampe there is no data over notification panel. Now phnoe android 5.1 I send picture about version.
Now I want to update Android 6,1 Usa Sprint.
Please tell me Is it any problems?
NavaKing0208 said:
Thanks so much for your response. I've tried this method, but still no dice :/
Click to expand...
Click to collapse
It happened to me too. The first step was the APN. changed the APN manually on mine but still it seemed no data connection was active. On step two I discovered that even the data seems not active, in reality there was a data connection and everything was working, but the icon was not showing due to something missing in the Sprint's SystemUI data connection icons.
So, try to put your apn manually and try and check if there is a data connection, i.e. using the browser to navigate.
---------- Post added at 11:34 AM ---------- Previous post was at 11:26 AM ----------
aksa63 said:
Hello
I bought Note 5 920P from china I use this mobile in Turkey bu we have some problem with this phone
for exampe there is no data over notification panel. Now phnoe android 5.1 I send picture about version.
Now I want to update Android 6,1 Usa Sprint.
Please tell me Is it any problems?
Click to expand...
Click to collapse
Open the notification panel - touch the "down arrow" symbol on the upper right corner to show all the icons and look there must be the data connection icon you're looking for.
As for the update: Updated myself to MM and everything works fine with the exception of 4G. This is not something caused by the update but because the LTE-4G bands the phone works are not compatible. Check yourself @ willmyphonework.net
Flash pure GSM kind of roms.
First go to official MM by ODIN, root it,
Via TWRP, flash Lamlazy ROM or aurora rom which is compatible rom without sprint stuff.
Try this rom http://bbs.gfan.com/android-8394771-1-1.html
Download link pan.baidu.com/s/1c2JZgje PW kr10
I didn't try yet. but it says N920p supported. If u are on sprint, am not sure how it works.. but GSM should work well.
That V7 of Lamlazy can be found here -- thread http://forum.xda-developers.com/show...&postcount=153

Can't connect to any cellular network anymore SM-G920F

Hello, I can't connect to my local mobile network anymore.
So I can't call or receive phone calls.
I am in Latvia, Baltic region.
My imei is legit and working, so is my phone number.
When I search for my mobile network it finds it -LV TELE2, easy, but when I attempt to connect to it, it shows it 'can't connect to this network try later', when of course the network is working properly for other phones., and it is the network that worked before.
I happened after I flashed a custom lineage rom. It was the right rom for my device,
and I flashed it in correct order and all worked except mobile networks.
I thought using odin to flash back the stock rom will fix it, but it didn't.
Now I am back to stock 7.0 , flashed csc SEB version for my region.
Now in mobile networks there is only Lte/2g/3g options, why there is no gsm or vcdma mobile service?
I believe my provider is gsm, so how to restore it so I could call again?
It shows no service in the drawer, and can't connect to my carrier.
Any help is greatly appreciated, thank you ^_^)/
Had same problem after my motherboard was changed in some mobile repair shop and old imei and stuff copied from old motherboard. After flashing stock 7.0 with ODIN, I had same problem. Luckily repair guy added some certs back free of charge. Something to do with not being official Samsung repair place and not having right kind of tool.
Sent from my SM-G920F using XDA-Developers Legacy app
Thank you for your info. Then it must be possible to fix it with the right tools even at home! I am sure there must be someone who knows how to do it and can help me, and many others with the same problem.
When you tap *#0011# imei status is OK or NG?
Hello, I typed *#0011# and yes imei status is ok, more info - rat=gsm (2g), band=pgsm900 and reg status is = not registered.
So this couldn't be an imei problem, could it?
During this time, I tried many roms, nougat and marshmallow, official and custom, but none has fixed it yet.
I was thinking, flashing original galaxy s6 lollipop rom will definitely do the trick,
because I remember I had a similar problem with my old galaxy s plus phone,
it was impossible to connect to any mobile network on any rom,
until I flashed the oldest stock rom for the device.
But the problem is, I can't find a working download for a custom lollipop rom, they are extinct it seems,
and the official lollipop rom can't be flashed with odin, obviously, because I have a higher fw already.
Official lollipop would be the best and would show if the problem is software related for once and for all,
but how to install it when knox and all kinds of binaries doesn't allow me to flash it with odin?
Is there another way to do it?
No need for this anymore, never solved the issue.
I sold the phone.
Thanks anyways ^-^)/

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