Please help my signal lost, how fix this?
What do you mean by signal lost? You didn't mention anything about your network service provider. Try changing the network type (available on settings), if possible re-flash the stock april modem. If it still doesn't work, do a clean flash.
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If my problem is already exist in other thread, please link me to those thread. So, I think nobody have my experience. I'm still completely clueless, but will try to restore to very original condition tomorrow.
I got very weird issue. My phone not work normally today, as it get low signal for a day and that horrible, make me want to test DX modem speed and signal stability.
So, here it is
I already rooted my device, and flash new modem because I install new ROM. After many reading, I read that my original modem DXUBMF8 one is more stable than my modem atm, the XXUBMG9, so I want to test the network speed. I already test my XX modem, and the result is not that bad (for real, it's good anyway), so I'm about to test my original modem. I flashed the modem, and also custom ROM that support it, and, my phone got the signal but it can't connect to the network (the signal shows bar, but not show the H+ with the up & down arrow, or the 3G). Then I tried to restore the stock ROM that I backed up in the first day after I rooted it (it was normal that day), and same things, the signal bar is filled, but no network indicator (H+, H, or the 3G), then I flashed the stock ROM and unroot it with firmware from sammobile.com. Same things happened, the bar is filled, but no network indicator. So it's like my connection is locked in my ROM which people say it's not stable, and haven't try the connection of my original modem.
Anyone experienced or know how to fixed this things ?
For the life of me I can't figure out what I did wrong. I purchased an Oppo Find 5 from China, rooted and flashed some custom ROMS. Somehow something screwed up my cellular connection. I get no service at all. I've flashed different roms, modems, factory reset ..you name it without success. The SIM card is detected but can't make calls or get data. Any ideas?
Edit: Problem solved: flashed a modem for x909t and now have service. I've been flashing x909 modem and that was the reason for connection failure.
Background:
- Sprint L720
- International unlocked with GSM SIM
After updating to a new 4.4 ROM (Slimkat) and NAE (modem only from the modem thread), connecting to anything other than EDGE causes, what seems to be, a modem crash. If I force "GSM only"/2G connection, it's stable with EDGE. If I try to connect to 3G, I see "3G" quickly flash on the status bar next to the signal indicator (I have full service), and then the whole mobile connecting drops and resets... then it goes back to having full service, but no data connection at all - until I got to mobile settings and set it back to "2G" and it goes back to stable EDGE.
I am overseas with the phone (it's fully unlocked and I got a strong H+ connection with the old CM ROMs at the same location), so I am wondering if it's an issue with the new 4.4 ROMs not supporting GSM? Perhaps some sort of baseband/modem mismatch? I also flashed NAE (modem only) as well when I did the ROM - I have since downgraded, but perhaps it isn't fully downgrading?
I applied the MF9 full one-click, no joy ... I did a factory wipe and applied the 4.2 factory image from SamMobile, no joy...
Looking at the logcat, I see something along the lines of an error for 'Mobile network type unknown: 0'...
Any help would be greatly appreciated - only having EDGE is driving me nuts, especially when my actual mobile network here is very fast..
Let me know of any information I need to provide - Thanks
Ok, update - I applied the MK2 modem and then NAE, as I saw someone else do because they said that the NAE file is missing some things... no joy
This all seems to have happened after applying the NAE modem-only file - Does SlimKat not support GSM? I don't think it's SlimKat, because, even going back to the fresh "Factory default" flash that I got some SamMobile, I still had the same issue..
Which leads me to what I think the problem is - the Qualcomm settings. Those seem to be persistent across all ROM restores, so how do I go about resetting the QUALCOMM settings to default? Is there something I can do with EFS Professional/CDMA Toolbox or something?
Hi, I'm from India and have a GT-I9500 which has been running flawlessly for the past 1 year on BSNL service right up to OS version 4.4.2 firmware vers. I9500XXUFNE4. Since then I upgraded the firmware twice to I9500XXUFNG1 and subsequently to I9500XXUFNI2. Midway while using firmware I9500XUFNG1 in rooted version, I started noticing that my phone data would run normally for a while and then suddenly the data connectivity would drop from H+ mode to 3G but would not return to H+ even though I know that I am in an area that has consistently strong H+ signal. The only option to get H+ mode back was to go to Settings/More networks/Mobile networks/Network mode/ and change the setting to WCDMA only mode for two minutes and then switch back to WCDMA/GSM(autoconnect), then the phone would get H+ service back again for a few hours. I thought that it might have been some problem caused by rooting, so when the latest firmware (I9500XXUFNI2) was released this month I upgraded the firmware but since I lost root on upgrade, I did not root the phone, fearing the problem will come back since I thought root was causing it.
Now in stock firmware running on I9500XXUFNI2 I am still getting the same problem of the phone dropping to 3G mode from H+ and not reverting back ( the speed is not even 2G. Just the 3G icon shows it - data packets hardly get transferred) and I can rectify it only by switching to WCDMA mode and back to autoconnect, as previously stated.
I checked online for solutions, but I don't seem to see anyone facing such an issue.
I thought it could be a service provider problem, so I used SIMs from Idea and Airtel as well, but while using those networks also, the same problem persists, so I have deduced it is a problem pertaining to the phone only. Not sure if it is a hardware malfunction or firmware based.
Does anybody else from India running the latest firmware for GT-I9500 have similar problems, and is there a solution?
Thanks.
Etrnlwanderer said:
Hi, I'm from India and have a GT-I9500 which has been running flawlessly for the past 1 year on BSNL service right up to OS version 4.4.2 firmware vers. I9500XXUFNE4. Since then I upgraded the firmware twice to I9500XXUFNG1 and subsequently to I9500XXUFNI2. Midway while using firmware I9500XUFNG1 in rooted version, I started noticing that my phone data would run normally for a while and then suddenly the data connectivity would drop from H+ mode to 3G but would not return to H+ even though I know that I am in an area that has consistently strong H+ signal. The only option to get H+ mode back was to go to Settings/More networks/Mobile networks/Network mode/ and change the setting to WCDMA only mode for two minutes and then switch back to WCDMA/GSM(autoconnect), then the phone would get H+ service back again for a few hours. I thought that it might have been some problem caused by rooting, so when the latest firmware (I9500XXUFNI2) was released this month I upgraded the firmware but since I lost root on upgrade, I did not root the phone, fearing the problem will come back since I thought root was causing it.
Now in stock firmware running on I9500XXUFNI2 I am still getting the same problem of the phone dropping to 3G mode from H+ and not reverting back ( the speed is not even 2G. Just the 3G icon shows it - data packets hardly get transferred) and I can rectify it only by switching to WCDMA mode and back to autoconnect, as previously stated.
I checked online for solutions, but I don't seem to see anyone facing such an issue.
I thought it could be a service provider problem, so I used SIMs from Idea and Airtel as well, but while using those networks also, the same problem persists, so I have deduced it is a problem pertaining to the phone only. Not sure if it is a hardware malfunction or firmware based.
Does anybody else from India running the latest firmware for GT-I9500 have similar problems, and is there a solution?
Thanks.
Click to expand...
Click to collapse
The problem is with the modem firmware. Change it back to the original or get a kernel.
Devilslasher said:
The problem is with the modem firmware. Change it back to the original or get a kernel.
Click to expand...
Click to collapse
Thank you, Devilslasher. Could you please link me to a thread where they have listed the original modem firmware? I did a search under the Samsung S4 subsection on xda but could not find any thread where modems/radios for Indian version was hosted.
Thanks in advance.
Good evening,
the problem my be known, but till now, I have not found a thread where a solution is presented. Now let's dive into my problem. Some days ago, I experienced the problem, that I am frequently using my network signal. Till that time, I was using the Firmware version 10.0.6 and the RR 7.0.1. I thought, maybe an Firmware update would resolve this issue, and I flashed the Firmware version 10.0.7 but the issued did not get fixed.
Yesterday I did an clean install of the ROM with the following steps: Firmware 10.0.7->ROM RR7.0.1->recovery TWPR->reboot recovery->Gapps->Magdisk->reboot system but even now I'm loosing my network signal from time to time. Is there an solution for this problem? Tomorrow I want install the SyberiaROM in order to verify if the problem is still present.
What could be reason for this problem? I already checked my IMEI numbers and both are matching with the sticker on the phone. Could it be, that my SIM tray is defect?
I had that problem and tested everything... Had to change my service provider to get stable signal.
You can try installing stock Pie, then downgrading to stock Oreo. If signal is good on Oreo, it is not a hardware issue. But if issue is still there, try changing your carreer. Still don't work? Bring your phone to the service center.
Sent from my Mi A1 using XDA Labs
Since January I am having the same problem, I can not make calls or receive them either.
After I installed the ROM clean the problem is still present. When I lose my signal, I can hit the airplane toggle twice and then I get my signal back. It's not really an workaround.