[Q] No service when screen is locked - Galaxy S 4 Q&A, Help & Troubleshooting

I wonder if you can help.
I have just flashed a new ROM to my S4 and now when I lock the screen the service goes. When I unlock it comes back.
The very odd thing is I can still receive calls while it shows as No Service.
I've gone into the networks settings and registered with my Network, but still the same thing happens.
The ROM is the 4.3 EchoeRom_v5PLUS_21Oct.
I downloaded and flashed I9505_XXUEMJ5_MODEM as I thought that might help - it didn't.
Any ideas?

Related

No, I DON'T have a voicemail!

I got my HD2 about a week ago, and from the moment I turned it on it's been telling me that I have 1 voicemail waiting. Except that I don't. I've checked my box multiple times just to be certain, nothing in there. I've tried dismissing the notice, it comes back. It constantly displays "1" in the lock screen. I've even flashed a custom ROM (Energy 23569, Jun 8) and it STILL says 1 voicemail waiting! How do I get rid of this phantom voicemail and have it report accurately?
I had that same problem for a while. I just fixed itself after I flashed to a certain energy rom.
I was having the same problem with mine. It was showing that I had a new voicemail from the moment I bought it. I just called T-Mobile and asked them to reset my voicemail box. The girl was very nice and when she tried to explain to me about the new HD2 update they had released, I hinted that I didn't have the stock ROM on my phone and she explained that was totally no problem. They know that with the current technology that people are doing that. She reset my voicemail box and the notification went away. You will have to setup your voicemail again after they reset it, but that takes no time at all.
same this is so annoying! any fixes will be much appreciated.
**** I just found this, might help. I have not tried it yet.
I had the same problem when I got mine. To fix it, all I did was go to the T-Mobile store and ask them for a new SIM card, they did a quick switch and it was gone, but im sure a custom ROM works too

Not Registered on Network?

I have an unlocked and rooted Samsung Galaxy phone.
Everything was working fine for a year.
Randomly, I lost connection today, and it says that it is not registered on the Network anymore. I tried taking the battery out and re starting the phone and taking out the Sim card, but no luck.
Any suggestions? If I were to install a new rom or the old one, do you think that would fix it?
I was thinking maybe its a problem with Fido, which is my provider, over a unpaid bill or something. I am not sure. Everything was working fine until like 9pm tonight, and then I lost connection.
Or do you think I have to use Odin to put it back to the original factory rom?
If I put it back to the original factory rom, would it become locked again?
This phone was very complicated to unlock, as when I tried the normal method to unlock it, it just gave me zeros.
I bought my phone originally off ebay about 8 months ago.
Everything worked fine pretty much up until tonight.
Do you think this means my phone is black listed? And I will have to change IMEI?
I am going to call my service provider here, but is unlocked, its a T-Mobile phone, but I am using Fido as a provider.
I got a vibrant t959 but some one updated it on i9000 rome by odin and unlocked as i9000. it unlocked but signal up and down always. now i updated it again on t959 original rom and rooted it, recovery and download mode came back again now its normal. but still signal problem. when check status typing *#7465625# it show all locks off position, but still have signal problem. pls any body help me if can.
regards
I was just wondering if I reset everything back to stock/original, will I have to unlock the phone again?
Or will it stay unlocked?
Check your APN settings first try googling your carriers proper APN and make sure its set properly. If thats not it, try reflashing your rom make a backup first.. I'm not sure about having to reunlock your phone you'll have to search XDA. That is a curious problem. Hopefully its not a stolen phone if so they may have blocked the IMEI number the only way to tell is to call the carrier if your paying your bill hey should be willing to answer your question. I recommend buying phones from someone you know and not online.
The phone actually worked today.
I am living in a basement, and I guess one of the towers went down or the reception is just gone bad.
When I went outside 30 minutes later I was getting full signal and everything worked.
Then I went back in the basement, it went back to searching for signal and provider.
Very strange, as I always use to receive signal in the past.
This same thing happened to me last night. I bought my phone a year ago outright. I downloaded sgs unlock app and unlocked the phone. It has worked fine until last night. I have tried entering the unlock code again and it says network unlock sim unsuccessful. I went to the att store and got a new sim thinking maybe the sim card quit working and this did not help. Seems like this has happened to a few people last night. Can anyone help?

[Q] S4 - disconnecting from network and not reconnecting again

Hi all,
Regular reader but hardly ever post!
I have a Galaxy S4 (GT-I9505) - with Android 4.4.2. Unrooted.
Purchased and used in Singapore on the Starhub network since around October 2013. Everything was working fine until approx Feb or March when the latest Android version, 4.4.2 got rolled out.
Ever since then I am experiencing regular disconnections from the network. But the phone does not re-connect back to the network again, the only fix is to restart the phone.
These disconnections are often once or twice a day, and are very frustrating because if I don't notice it, I may be off the network for hours before noticing it - and are therefore missing out on calls emails etc etc.
This only happened after the Android 4.4.2 got rolled out, so I am pretty confident this is the cause of the problem.
What I tried myself to fix:
- restore APN's back to default state
- Factory reset (both via settings, and via boot screen)
What I have been able to narrow down troubleshooting, is:
- Disconnects seem to only happen when Network Mode is "LTE/WCDMA/GSM (auto connect)"
- If I use network mode "WCDMA/GSM (auto connect)" the disconnections have not happened (yet!)
- When the disconnection does happen in the first mode, I cannot manually change the network mode. The radio buttons are greyed out, and if I try to select "WCDMA/GSM auto connect" the request times out (I forget the exact message - it does respond to the tap but then nothing happens)
So it seems to me this is some sort of software bug/fault introduced with Android 4.4.2 that affects 4G connections.
After that, I have taken it to Samsung for warranty service. I have now had 4 visits to them and they have not been able to fix it yet. This is what they have done so far:
- First visit - factory reset (despite telling them I already did that) - did not fix
- Second visit - checked hardware and replaced mainboard. Did not fix.
- Third visit - checked hardware again and factory reset again. Did not fix.
- Fourth visit - who knows. I think same as visit three but done via a Service Manager instead of staff, Did not fix.
When I first called them back in Feb or March, they said it was a "known Issue' and sugegsted to "wait for a patch". However since visiting them, they said the known issue was only with Note 3's (not with S4's) and replacing the mainboard on the Note 3's fixed the problem. In my case replacing the mainboard - twice - has not fixed it.
I'm getting very annoyed with Samsung who seem to just be trying the same thing each time and are not fixing it. Staying in 3G only mode is a workaround but not an acceptable solution.
Now they've asked me to take if back again - for a 5th time.
Beginning to wish I had never bought the S4, or at least never got Android 4.4.2.
So I thought I would turn to here for help instead, I think you guys and gals probably know more than the Samsung service staff!
Any suggestions?
By the way, I don't run any memory/battery saver apps. I do run one data usage monitoring app that I thought perhaps was conflicting, so I tried not installing it after one of the resets, but the problem continued.
Chikara71 said:
Any suggestions?
Click to expand...
Click to collapse
you CAN try other modem flash, but be careful with your warranty.
I do not know about the warranty conditions in your country, but in EU normally 3 unsuccessful repairs = phone refund or replacement.
I would try reflashing stock file or just flash a different modem
Hello, just like you i have been reading the post but never posting because i just came here to learn, nothing to share from this side...sorry.
But i am having the same problem as you. I bought my phone in Switzerland on march 2013 but i live in Uruguay. I was just thrilled with my s4 until the 4.4.2 update came out. My connection keeps on crashing and it doesnt matter if its on 4g or 3g just make me miserable all day. Only the two of us is having this type of problem??
I believe is some kind of issue with the new bootloader i just updated with a patched rom that came for Germany last week (the one with kids mode) the phone work fine for a hours and then crashes, so this update didnt work. I have also flashed very differents official roms and modems but nothin seem to affect the problem.
I have another problem even though my s4 is 4g i cant connect to 4g network, every configuration is fine i just cant connect, any thougths??
Thank you very much.
Sorry for my english.
Dial *#1234# and paste here what appears.
Joku1981 said:
Dial *#1234# and paste here what appears.
Click to expand...
Click to collapse
AP: I9505XXUFNBE
CP: I9505XXUFNBE
CSC: I9505OLBFNB3
I should add, I took it in *again* to Samsung, to the Service Manager. Said they would replace the antenna and try that, which they did.
Still have the same problem though.
Not sure who to believe, Samsung are starting to run out of ideas and starting to say it may be a network issue. But if the network is down, then the phone should automatically reconnect once the network is back available again. And it doesn't.
I'm convinced it's a bug introduced with KitKat, as the problem only started then, but of course I cannot prove it...
felgrab said:
Hello, just like you i have been reading the post but never posting because i just came here to learn, nothing to share from this side...sorry.
But i am having the same problem as you. I bought my phone in Switzerland on march 2013 but i live in Uruguay. I was just thrilled with my s4 until the 4.4.2 update came out. My connection keeps on crashing and it doesnt matter if its on 4g or 3g just make me miserable all day. Only the two of us is having this type of problem??
I believe is some kind of issue with the new bootloader i just updated with a patched rom that came for Germany last week (the one with kids mode) the phone work fine for a hours and then crashes, so this update didnt work. I have also flashed very differents official roms and modems but nothin seem to affect the problem.
I have another problem even though my s4 is 4g i cant connect to 4g network, every configuration is fine i just cant connect, any thougths??
Thank you very much.
Sorry for my english.
Click to expand...
Click to collapse
Sounds very similar to my problem, that it just started with Kitkat only. I'm sure it can't be just us two having this problem! I don't have anything special or different installed on my phone, and it's too suspicious that it was working fine, 100% perfectly until the KitKat software came out...
Joku1981 said:
Dial *#1234# and paste here what appears.
Click to expand...
Click to collapse
AP: I9505XXUGNE5
CP: I9505XXUGNE5
CSC: I9505OXAGNE5
Thank you so much for giving us a hand!!
Chikara71:
I know it just cant be the two of us from such diferent places in the world but, i just cant find any similar in any post or google. It has been almost 3 months from the update an me using another phone...
Well I thought I would post again to close the loop.
After Samsung tried 5 times to fix my phone, checking hardware and trying to reinstall the OS with no luck, they suggested I try replacing my SIM card.
Surprise surprise, it has fixed the problem with no recurrence yet after a week so far.
I still don't understand how the sim card could be the problem, especially as my phone was working perfectly right up to the Kitkat software update. All I can assume is somehow KitKat either had an incompatibility with my simcard (maybe the new sim is technically slightly different?) or maybe KitKat somehow changed something on the simcard, if that's even possible.
Interestingly, I did contact my telco first, and they told me to contact Samsung. As it turned out, the fix was in the control of the telcom right from day one.
Anyway, so far the problem is resolved, so I thought I would post this here to help anyone that may have this problem.

Flashed to Stock Rom, but now have "No Service"

Hello, First time poster, and quite frankly a noob at a lot of this. Here's my issue, i have a at&t Samsung Galaxy S4 that i recieved from a family member that was stuck in a serious boot loop. Only way i could get it to come back was to flash the stock firmware, which worked excellent....now my issue, it seems like about 98% of the time i have the "No Service" icon up top. I got the phone locked through at&t but have since unlocked it to use on Straight talk, as thats what i was originally advised to do by an at&t member (turns out I didnt even need to do this in the first place as ST is just using the at&t towers as a reseller). Unlocked phone, still no service. I had ST previously in a Galaxy S2 in my current location and service was superb, so i know its not a carrier issue. Is it possible that when i flashed stock rom, that i missed something? I checked around and it seems like my modem is updated to the latest setting. When i switched it to ST after about 30 minutes the signal popped up and it seems like as soon as it showed up, it was gone again. Since that point i've been able to make 1 call (I activated ST about 4 days ago) and that call was today, with only 1 bar of reception. Shortly after that call the signal dropped completely again. I am at a complete loss as to why it refuses to get any reception. I was thinking maybe the modem needs to be updated, but the wifi works perfect, and the reception seems to show up (just as 1 little bar) rarely. Anyone have any ideas?
Also, as a little side note, i have done a hard reset a few times and to no avail at fixing the issue. I assume since at certain times i do get the little "1 bar" connection that its not a hardware issue but a software issue thats withholding the phone from reaching potential reception. Any help would work wonders as i've paid the $60 for the BYOP Straight talk.
Which firmware did you flash as the latest firmware is 5.01 and there is no stock rom from att for this version.
Reynolds_____ said:
Hello, First time poster, and quite frankly a noob at a lot of this. Here's my issue, i have a at&t Samsung Galaxy S4 that i recieved from a family member that was stuck in a serious boot loop. Only way i could get it to come back was to flash the stock firmware, which worked excellent....now my issue, it seems like about 98% of the time i have the "No Service" icon up top. I got the phone locked through at&t but have since unlocked it to use on Straight talk, as thats what i was originally advised to do by an at&t member (turns out I didnt even need to do this in the first place as ST is just using the at&t towers as a reseller). Unlocked phone, still no service. I had ST previously in a Galaxy S2 in my current location and service was superb, so i know its not a carrier issue. Is it possible that when i flashed stock rom, that i missed something? I checked around and it seems like my modem is updated to the latest setting. When i switched it to ST after about 30 minutes the signal popped up and it seems like as soon as it showed up, it was gone again. Since that point i've been able to make 1 call (I activated ST about 4 days ago) and that call was today, with only 1 bar of reception. Shortly after that call the signal dropped completely again. I am at a complete loss as to why it refuses to get any reception. I was thinking maybe the modem needs to be updated, but the wifi works perfect, and the reception seems to show up (just as 1 little bar) rarely. Anyone have any ideas?
Click to expand...
Click to collapse
If your wifi is working perfect, then modem is not your problem. I have never used Straighttalk but you mentioned that ST is using the AT&T towers so there might be a problem in your simcard registration. Call the ST customer service, tell them your problem and ask them to reprogram your simcard with your phone IMEI. See that would solve your problem.

should i try 1 more reset

Hi all
My s8 is from Vodafone before i got an update weekend just gone i had problems with my Wi-Fi calling it worked but only problem was that no one could hear me told Vodafone about the problem and was told it be fixed in next update.
Well I get the update just recently but the problem i have now is that the Wi-Fi calling symbol flashes up for a second or two then goes off. I tried using my home internet with WiFi calling on and still won't connect even when my signal goes down to 1 bar still no WiFi calling i have tried resetting the phone but no luck.
So should i try once more and reset phone as a new one? Or is there something wrong with my software?
mimo2008 said:
Hi all
My s8 is from Vodafone before i got an update weekend just gone i had problems with my Wi-Fi calling it worked but only problem was that no one could hear me told Vodafone about the problem and was told it be fixed in next update.
Well I get the update just recently but the problem i have now is that the Wi-Fi calling symbol flashes up for a second or two then goes off. I tried using my home internet with WiFi calling on and still won't connect even when my signal goes down to 1 bar still no WiFi calling i have tried resetting the phone but no luck.
So should i try once more and reset phone as a new one? Or is there something wrong with my software?
Click to expand...
Click to collapse
Do you try hard reset from stock recovery if not try this.
The second option if this rom not working properly downgrade your previous version through Odin.
Before do anything make a full backup of your data and internal storage.
Thanks for fast reply.
The problem is it has Vodafone software on there and I can't change it through Odin unless i flash another Rom which i don't want too. I will probably try one more reset and see what happens
mimo2008 said:
The problem is it has Vodafone software on there and I can't change it through Odin unless i flash another Rom which i don't want too. I will probably try one more reset and see what happens
Click to expand...
Click to collapse
On sammobile.com you can download a stock ROM for your country and your carrier. This won't void your warranty.
Then check again and if the issue persists, exchange the device to a new one.
I'd try a hard factory reset, download the update, then restore and see how that goes. When I first received the S8 I noticed lagging and stuttering after I upgraded I still noticed it and did a reset. After the update all the stuttering and lagging completely went away
Try putting phone into flight mode then turn wifi back on. See if wifi calling kicks in then. It's too flaky for me being unreliable so have a sure signal at home where signal is poor.

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