Can't connect to network suddenly and emergency calls only - Samsung Galaxy S8+ Questions & Answers

Today i went on business trip and while on plane i put airplane mode on. Upon landing i couldn't connect to network anymore, it gives me 2 errors depending if i manually select network or try automatically, those 2 are Unable to connect. Try later and Error while searching for network.
I reset network settings, restarted phone, reset it, tried different sim in my phone and it didnt work either, mine did in other phone. I dont known what to do besides wait to go home and give it to service since its under wattany... any ideas please?

N_L said:
Today i went on business trip and while on plane i put airplane mode on. Upon landing i couldn't connect to network anymore, it gives me 2 errors depending if i manually select network or try automatically, those 2 are Unable to connect. Try later and Error while searching for network.
I reset network settings, restarted phone, reset it, tried different sim in my phone and it didnt work either, mine did in other phone. I dont known what to do besides wait to go home and give it to service since its under wattany... any ideas please?
Click to expand...
Click to collapse
is your phone rooted or did you install a custom rom/kernel on it?

All stock
I get bars but cant get on network. Carrier back home said i seem connected and reset it but it's not card issue as i tested for that...

Maybe this can help
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I can also open and browse carrier sim app but cant receive resulting messages from stuff there or make a call...weird stuff

N_L said:
I can also open and browse carrier sim app but cant receive resulting messages from stuff there or make a call...weird stuff
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Click to collapse
You didn't say but have you tried a reboot?

At least20 times, wiped cache too

Came home and network works... I'm still taking it to service but don't know how they'll or I can test it. Other sim produced same error abroad so it's not that...
Edit:
Bit of an update:
I called my warranty place they said phone is from Italy which now made sense but that it should work. I ran imei check and it says blacklisted. I bought it new unsealed with warranty from official place so now I'm gonna need a new phone, right?

It is the bug of Samsung. I am having the same problem all the time on both S8+ and S7Edge. Iphone 6 is fine. Typical answer form Samsung is 'network or sim' related. O2 is saying problem with your phone. When I choose network manually everything is working. As a fix you can turn 4g off when roaming

Related

Blacklisted?

In a full T-Mobile coverage area I lost the signal. When I attempt to connect it says this sim can't be used on the network? Factory reset and It's still the same.
Sent from my HTC One S
Could use more info
But, have you called tmobile and see if they can change towers to reconnect you or get a new sim
did you pull sim
check your apn settings
are you ok on wifi
Go into Settings / Mobile network / Network Operators / Select Automatically.
it will say searching for network and it will register on T mobile's network. after that you should have Voice / Data
Happened to me Once (or twice, cant remember) on my HTC Sensation
assumed OP already tried that--hope so--
rugmankc said:
Could use more info
But, have you called tmobile and see if they can change towers to reconnect you or get a new sim
did you pull sim
check your apn settings
are you ok on wifi
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Click to collapse
I haven't called T-Mobile yet, just got home.
Wifi works, I opened this thread over WiFi.
I don't get a signal at all, so I don't think this is an APN problem.
solracarevir said:
Go into Settings / Mobile network / Network Operators / Select Automatically.
it will say searching for network and it will register on T mobile's network. after that you should have Voice / Data
Happened to me Once (or twice, cant remember) on my HTC Sensation
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I tried that and rebooted. I put my sim in a Motorola Defy, and it works perfectly. I'm about to call T-Mobile and the guy I bought it from.
Here's a picture of what it says after I tried the Select Automatically:
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if it never worked and you bought it from someone--maybe just a new sim needed
hope no hw issues
rugmankc said:
if it never worked and you bought it from someone--maybe just a new sim needed
hope no hw issues
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It has been working since I purchased it last week. I'm chatting with T-Mobile now.
good luck--
rugmankc said:
good luck--
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Click to collapse
I purchased it on eBay, so I can always open a case.
The rep confirmed it was blocked today Now to call the seller and more than likely open a case.
I was going to say "sims die", get a new one, but a lot of recent posts lead me to say "don't buy a phone on ebay unless you are prepared for it to be stolen and blocked".
yeah, i would never do that. maybe craigslist where i can locally pu and try
but, it is what it is and hope the OP gets it sorted
Now what :beer::what:
Sent from my HTC One S using xda premium
huh i don't get it
The seller was very nice, I'm shipping it back today. I purchased it from Discount Wireless in IL. They probably bought it used, and someone reported it stolen.
Glad it's working out--

Keeps dropping network

Woke up this morning, no service, keeps saying current network (T-Mobile) is unavailable, the only way it'll work is if I pull sim card out, power it down, reinsert it and start it back up, it'll work fine for about half an hour and drops network again.
I'm running latest mahdi ROM, nothing else modified.
Any help appreciated.
BTW sim card is relatively new( about 5 months old)
Try a different ROM and if it still does it RMA the device I was having problems with service to where when I was using data it would decide to switch to h/3g I'm on T-Mobile as well
spinninbsod said:
Try a different ROM and if it still does it RMA the device I was having problems with service to where when I was using data it would decide to switch to h/3g I'm on T-Mobile as well
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Thanks for the suggestion, i don't think its the ROM, but to put my mind and ease and eliminate that possibility I'll flash another ROM tonight.
Btw how does the RMA work? I've never had to go through this before
Thanks
If you purchased it through T-Mobile just call T-Mobile and tell them you're having problems with it and just do troubleshooting stuff and if what they say doesent work unroot it and send it back and if you purchased it through google same exact thing
Although I bought it brand new, it wasn't from Google or T-Mobile itself. If I can't rectify this with software I'll have to contact lg and see what they say
No bueno, flashed other ROM and currently on stock ROM still having same problem, service drops off rendering phone useless. Emergency calls only is all i get.
Any advice?
Try going to the service menu which you can get into by dialing *#*#4636#*#* in dialer. Go into phone information and try changing this setting:
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Since you're on t mobile I'd recommend trying anything but CDMA. WCDMA is fine though. Maybe one of the options will help solve your connectivity issues.
Personally I'm on WCDMA only when connected to WiFi. This gives me 3G. Otherwise I am on LTE only. GSM should give you 2g.
Sent from my Nexus 5 using XDA Free mobile app
e4604 said:
Woke up this morning, no service, keeps saying current network (T-Mobile) is unavailable, the only way it'll work is if I pull sim card out, power it down, reinsert it and start it back up, it'll work fine for about half an hour and drops network again.
I'm running latest mahdi ROM, nothing else modified.
Any help appreciated.
BTW sim card is relatively new( about 5 months old)
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Have you tried different modem?
Figured it out, in short I got scammed. Called tmobile today, they blacklisted the phone for non payment, I guess the guy that sold it to me hadn't paid it off/paid. I guess lesson learned, call service provider and make sure device is paid off.
It still works with att. At this point I'll sell it as such and or for parts.
Thanks everyone

[Completed] Can't activate Droid Turbo 2 - Hardware Issue?

Hello!
I have already poured my heart (an obsessive number of hours) into getting as far I as I have with this and could really use some expert advice. I have repaired a water damaged Droid Turbo 2 (factory unlocked, locked bootloader) stuck in bootloop and eventualy got the device to a point where everything I tested (screen, digitizer, sensors, wifi and bluetooth radios, speakers, microphone, cameras, flashes, battery and charging circuits, ...) worked. I was super excited, until I tried to activate the device with my carrier today, multiple times, (Metro PCS) and failed. I'm not an expert on this stuff, especially how cell networks work, and I need guidance on what to do next.
When I attempted to activate the device at the Metro PCS store they set the phone up from the carrier's end with the IMEI and sim card number, and after the phone was rebooted multiple times no connection was ever made. No service is shown on the 'bars' and Cellular network settings > Mobile Network Type displays 'No service'.
The brand new sim card appears to be functioning. When calls are attempted, a prompt appears that states the phone will not make calls on airplane mode, even though airplane mode is definitely not active. The prompt allows you to select 'Yes' to turn airplane mode off, after which the phone states that it is turning on the radio. This process apparently times out, and I am sent back to a blank dialer. The people at the store or Metro PCS Dealer Support Group haven't been able to tell me why it won't work, except a lady on the line eventually said that she thinks the phone only supports CDMA, but I am sure this isn't true. At the store we did try manipulation of APN settings with no luck as well.
Main things I did to get the phone this far (ie. before ever attempting to activate it with a carrier) - flashed OEM firmware 6.0.1 I found online (didn't fix), torn phone down and cleaned corrosion with 91% isopropyl alcohol (the step that got the phone out of bootloop), tore NFC/wireless charging coils part flex cable in the process which caused the charging circuits to malfunction, replaced that part, and tested every feature I possibly could.
The only two things I can think of as to why I can't get the device onto my network: the cellular radio happens to be the only thing still broken on the phone OR it's just not going to work with Metro PCS for some reason.
I know there are people on these forums that know a lot about this stuff, and I could really use your help. Any advice will be appreciated.
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Hi !
Most probably a hardware issue , let`s keep the discussion in one place
Original thread here
Good luck !
thread close

"No signal found for mobile networks" Nougat update bug?

Has anyone else been having this error???? Never happened until I updated to 7.0, the phone will say "No signal found for mobile networks" after sending a sms, when CLEARLY in the screenshot I am still connected to 4G with full bars. Only way to bring it out of it is if I make a phone call to someone, then quickly hang up.
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flametai1 said:
Has anyone else been having this error???? Never happened until I updated to 7.0, the phone will say "No signal found for mobile networks" after sending a sms, when CLEARLY in the screenshot I am still connected to 4G with full bars. Only way to bring it out of it is if I make a phone call to someone, then quickly hang up.
Click to expand...
Click to collapse
My signal was a little wonky after I first updated, but seems too be fine now.
im having the same issue. its only after i reboot the phone or full shut down and power up. making a phone call is the only way i can start sending and receiving text messages. Not sure if it has anything to do with me being on Total Wireless? I have done 3 or 4 full wipe and restores some through the phone and 1 through Odin via the new Nougat tar file. still doing the same thing.
I am on TotalWireless as well. In Mobile Network Settings I have to use Global Mode in order to have full functionality of Calls|Text|3g/4g Data. Using LTE/CDMA mode I have 4g Data and can place phone calls, but I can't receive calls or send/receive texts.
After setting Global Mode and rebooting the phone you should have full functionality. If you don't, customer service may need to reprovision your phone, or delete and re-add it back on your account. If you do have to deal with Total Wireless CS, I would highly suggest using chat.
NeoandGeo said:
I am on TotalWireless as well. In Mobile Network Settings I have to use Global Mode in order to have full functionality of Calls|Text|3g/4g Data. Using LTE/CDMA mode I have 4g Data and can place phone calls, but I can't receive calls or send/receive texts.
After setting Global Mode and rebooting the phone you should have full functionality. If you don't, customer service may need to reprovision your phone, or delete and re-add it back on your account. If you do have to deal with Total Wireless CS, I would highly suggest using chat.
Click to expand...
Click to collapse
Downgrading back to QA1 fixes the issue so i doubt its a provisioning issue with Total Wireless but maybe i will give them a call, thank you!

Question Software Update disappeared

Unlocked variant from Samsung. I had a Software Update setting section. Soon after putting my Verizon SIM in the device the setting isn't there anymore.
Not sure how to fix or get the setting back. I can't check for new updates either
I have an unlocked variant (SM-F711U1) running a Verizon SIM and software updates option is right in the main settings menu
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If you can't find it there, try going to Settings; About Phone; then on the bottom you should see "looking for something else?" And software update under it. Check the pic I've attached
This is all I have
Sorry for the late reply, but to me it almost seems like your phone didn't quite set itself to Verizon's configuration when you put your Verizon SIM card in. It's almost like it has no configuration for updating software PERIOD. This is very strange as even the unlocked version, while brand new, with no SIM ever put in should still show some form of a software update option when connected to internet.
The two suggestions I have are 1)
Use Google dialer set to default and dial code *#*#3747#*#* that will take you to a menu with three options and you want to tap on the "phone information" option and there will be a massive amount of information about your phones network configuration in there including stating that it is actively running on the Verizon network and successfully has the carrier provisioning info. (Disclaimer: I suggest not getting curious and manually changing settings in there when you don't know what you're doing because you can disable network bands and really end up having to factory reset your whole phone if you don't fully comprehend what you're changing) I'm just suggesting that you look visually to make sure of what I said above is what you see.
2nd)
If nothing else, pop your sim card out and go to settings, general management, reset and then tap the reset network info option and let your phone reset it's whole network configuration. If it doesn't reboot itself after then manually power the phone down, while powered down reinsert your Verizon SIM card and then power back up and give it a few minutes to get itself reconnected to Verizon's Network and after about 10 minutes I would reboot the phone again and see if anything has changed.
Spoiler: Also check this in about, status information, SIM status
You should see what you see in my picture when you click the spoiler link.

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