Samsung galaxy s8 network problem - Samsung Galaxy S8 Questions and Answers

Hiii... I bought samsung galaxy S8 from online store... It was working fine untill i saw knox error in notification panal and keep loosing network signal.. and it was also running on android 8.0 November security patch... How ever i download the latest firmware and install it using odin everything went fine i boot successfully but after booting and setting up the device i notice i do not getting sim signal i did factory reset and search all night on internet what is the problem but find nothing in the next moring i took it to a mobile repair shop there was a guy how install mobile software and jtag all that stuff... He told me the imei of your device is changed and he charge me very high fee and roll back it to 8.0 and root it with migsk and i got signal back.. but each time i reboot my mobile i loose signal and i have to eject and reenter sims to get network back.. i don't know what he do to get it back working.. but if anyone here on xda know the issue and have solution for this please help me i need to get one UI and 9.0 pie or atlest let me know what 8.0 rom he install on my device to get signal back i'm attaching some pics see if anyone understand what to do.... Just tell me any stock base custom rom to get it work thank you..

Problem solved... I'v been stuck on android 8.0 on s8 for a very long time coz if I update to 9.0 pie I lose my network signal because of repair imei number.. A very talented Devaloper here from XDA name @ZeroXO) reach out to me and said he can help me as I mentioned him before @ZeroXO help me to get 9.0 pie on my S8 and I still have my network service both sim are working fine a huge shout out to my man @ZeroXO... thank you so much for helping me

mianzaim said:
Problem solved... I'v been stuck on android 8.0 on s8 for a very long time coz if I update to 9.0 pie I lose my network signal because of repair imei number.. A very talented Devaloper here from XDA name @ZeroXO) reach out to me and said he can help me as I mentioned him before @ZeroXO help me to get 9.0 pie on my S8 and I still have my network service both sim are working fine a huge shout out to my man @ZeroXO... thank you so much for helping me
Click to expand...
Click to collapse
Hi good to know...
Have you an idea on how to repair a lost IMEI number on an Galaxy S5 (it was my old phone and its sleeping doing nothing at home right now) ?
Envoyé de mon SM-G955F en utilisant Tapatalk

Benjamin2557 said:
Hi good to know...
Have you an idea on how to repair a lost IMEI number on an Galaxy S5 (it was my old phone and its sleeping doing nothing at home right now) ?
Envoyé de mon SM-G955F en utilisant Tapatalk
Click to expand...
Click to collapse
Hy i thing ZEROOX could help you on this one

mianzaim said:
Hy i thing ZEROOX could help you on this one
Click to expand...
Click to collapse

Network Connection on s8
mianzaim said:
Problem solved... I'v been stuck on android 8.0 on s8 for a very long time coz if I update to 9.0 pie I lose my network signal because of repair imei number.. A very talented Devaloper here from XDA name @ZeroXO) reach out to me and said he can help me as I mentioned him before @ZeroXO help me to get 9.0 pie on my S8 and I still have my network service both sim are working fine a huge shout out to my man @ZeroXO... thank you so much for helping me
Click to expand...
Click to collapse
hi! May I kno what made you do to help you get your network working again? thank you!

Related

No phone calls?

Hey guys, I come here very often and now I'm going to have to open this thread because I've seen absolutely no posts about my problem..
My S6 Edge+ is currently unable to make any calls and I don't know why..:crying: the strange part is that I can still send text messages and use my SIM's mobile data... Another weird thing is that whenever I reboot the phone, my WiFi passwords are forgotten..
Can any one help me? I'm currently running android 6.0.1 and I am considering downgrading it to 5.0.1 to see if it solves the issue...
Still needing help..
No one?? I really need some help since I've tried 4 different roms and modems ano nothing seems to work....
Have you wiped everything and then flashed a stock rom?
/CK
CyberDrag0n said:
Hey guys, I come here very often and now I'm going to have to open this thread because I've seen absolutely no posts about my problem..
My S6 Edge+ is currently unable to make any calls and I don't know why..:crying: the strange part is that I can still send text messages and use my SIM's mobile data... Another weird thing is that whenever I reboot the phone, my WiFi passwords are forgotten..
Can any one help me? I'm currently running android 6.0.1 and I am considering downgrading it to 5.0.1 to see if it solves the issue...
Click to expand...
Click to collapse
Which variant do you have and which MM firmware did you flash? Check your modem, imei, network operator etc and provide that info here.
Also wifi password IMO related with
Code:
ro.securestorage.support=true
this line in build.prop. I would suggest you to add this line under 'ADDITIONAL_BUILD_PROPERTIES' in build.prop but assume you havent rooted your device. If have, add it.
Powered by Elektrik
I've downgraded to 5.1.1 and it didn't work, I have the international version of the s6 edge plus and now I'm looking for a new ROM to test to see if I can solve it.. I've checked my imei in two different websites and on imei.info it comes clear, but the other site gives me a blacklisted warning, which makes me think since I bought it online second hand... it probably was reported stolen or lost and now it's blocked... which ise rather inconvenient. .
If I go to SIM Card Status it says "Not Available" everywhere, but on imei information it says my imei and on IMEISV the value is 01. It's network unlocked and right now I'm about to flash a new ROM, probably stock..
Hello, I have the same problem at boot after I receive the call when making a call nothing remains of numbering you have a solution? thank you cordially guillaume
Hi guys, I know this is a really old thread but I'm here just to say that the problem was with the IMEI, it was blacklisted..
I changed it with a friend and then everything worked fine..
Thanks for you help mates!
CyberDrag0n said:
Hi guys, I know this is a really old thread but I'm here just to say that the problem was with the IMEI, it was blacklisted..
I changed it with a friend and then everything worked fine..
Thanks for you help mates!
Click to expand...
Click to collapse
how to check for imei blacklisted ?
natrajshekarj said:
how to check for imei blacklisted ?
Click to expand...
Click to collapse
You can go to imei.info and there's a paid check.

mobile region unknown

Hello to all
I have bought a second hand Samsung galaxy note 3 n9005. i have noticed that the region is mismatched. i am saying this because the signal reception is really bad. call wont go through and after some tries it will and etc. i do not know what is the real region of the mobile. is there anyway to know that? currently i have my imei intact, so i do get signals.
I am currently on KITKAT
i will be really grateful if anyone can help me out.
Hope to hear from you guys soon
Thanks in advance
Original region is not what you want .
You want firmware or baseband and CSC for the network you want to use now .
Phone Info from Play store will give phone details.
thanks for ur reply
Ic
i have tried a few firmwares that work here but their reception is not good
Modem / Base4band is the key .
hmm ic
that is the main issue
how do i identify which baseband (region) was my phone orignally on?
because there are too many of them available and if i try them one by one then it will take too much time and also there is a chance that the imei might go null
Start.
Where are you and what network.
Say you are in the UK and on O2 network then you flash uk o2.
But backup your EFS first .
Sent from my SM-N920C using XDA-Developers mobile app
I have done this but no go
Loose connection bad sim or hardware fault .
dunno
things seems ok apart from this issue and my sim works perfectly on other mobiles
any more suggestions please
Thanks

Galaxy S7 Edge not registering on Network by all means

Before I post here I dit a lot of research and I get stuck in this point
The general problem was the imei and the serial number of my galaxy S7 Edge changed to something else after a root and a restore of firmware.I found here thanks to XDA forum the way to fix both of them.Now I have the correct imei,the correct serial number but when I insert a sim card I go on mobile networks and check for available networks and after I choose the correct one it says registered on Network but when I try to make a call or something on the dialer it says Not Registered on Network
I need to knom if there is anything else that needs to be done for the phone read and register the sim card.I still having the error of dm - verity failed so I flashed to bypass that.Beside that the phone is on stock rom with twrp and rooted.Please help me.Thanks for reading
monteiro75101 said:
Before I post here I dit a lot of research and I get stuck in this point
The general problem was the imei and the serial number of my galaxy S7 Edge changed to something else after a root and a restore of firmware.I found here thanks to XDA forum the way to fix both of them.Now I have the correct imei,the correct serial number but when I insert a sim card I go on mobile networks and check for available networks and after I choose the correct one it says registered on Network but when I try to make a call or something on the dialer it says Not Registered on Network
I need to knom if there is anything else that needs to be done for the phone read and register the sim card.I still having the error of dm - verity failed so I flashed to bypass that.Beside that the phone is on stock rom with twrp and rooted.Please help me.Thanks for reading
Click to expand...
Click to collapse
Yes i am duplicate problem rom flash not registered network after nandroid backup restore baseband fix after android 7 roms not work not registered network
hasanben35 said:
Yes i am duplicate problem rom flash not registered network after nandroid backup restore baseband fix after android 7 roms not work not registered network
Click to expand...
Click to collapse
Have you checked your APN.. ??
S7 Edge Powered by Echoe
Xode said:
Have you checked your APN.. ??
S7 Edge Powered by Echoe
Click to expand...
Click to collapse
The APN is set up and all settings are fine but still nothing.I dont have internet data on phone because i am not be able to register to lycamobile
Xode said:
Have you checked your APN.. ??
S7 Edge Powered by Echoe
Click to expand...
Click to collapse
Not work
F device Fd owerrite not vork two sim not work two imei
Same thing happened to me a few days ago. To solve the problem I flashed stock firmware, applied root using ODIN, and patch IMEI and certificates using Z3X Box. According to the guy who helped me with the Z3X, there's no way you can make the phone work again without patching IMEI and cert. When fixed, you won't be able to update nor factory reset the phone. If you do so, you'll have the same problem again. It's a matter of KNOX security on the S7 Edge.
zeth385 said:
Same thing happened to me a few days ago. To solve the problem I flashed stock firmware, applied root using ODIN, and patch IMEI and certificates using Z3X Box. According to the guy who helped me with the Z3X, there's no way you can make the phone work again without patching IMEI and cert. When fixed, you won't be able to update nor factory reset the phone. If you do so, you'll have the same problem again. It's a matter of KNOX security on the S7 Edge.
Click to expand...
Click to collapse
Hi Zeth...!
Can you explain why this happens and how to do the job in Z3X ?
I think I need at least version 24.8 (suppport for S7)... can you point where I can get it with no-card loader ? (I was unable to get it).
Thanks...!
Javier.
Well, as far as I know this issue happens because of the new security features on the phone. It has to do with the certificate written on the phone. Once you change it, it triggers an "alert" that is impossible to turn off, unless you patch it again. Unfortunately, according to some flashing sites, it can't be done over Nougat, hence your phone will remain on Marshmallow until a new method is found. I didn't do the flashing with Z3X. I payed a guy to make the process. I've been looking for a card-less Z3X but I only found an older version which doesn't support S7.
zeth385 said:
Well, as far as I know this issue happens because of the new security features on the phone. It has to do with the certificate written on the phone. Once you change it, it triggers an "alert" that is impossible to turn off, unless you patch it again. Unfortunately, according to some flashing sites, it can't be done over Nougat, hence your phone will remain on Marshmallow until a new method is found. I didn't do the flashing with Z3X. I payed a guy to make the process. I've been looking for a card-less Z3X but I only found an older version which doesn't support S7.
Click to expand...
Click to collapse
yes sir cert not work z3x box nougat stock after marsmallow cert and imei write z3xbox full work
not registered in network
I got a SM-G935FD model less than a month ago. Everything was going fine with performance and network. But 2 days ago i factory reset my phone to get rid of "the unauthorised action...." notification. The notification is still showing and also my network isn't working now...so i can't connect with internet now.....phone is unrooted. Should i update my marshmallow to naugat? or any tips...plz help......I AM VERY FRUSTRATED NOW.....HELP....HELP...
S7 with z3x box
Hi Guys , hope you all are well , I have the z3x box and I tried to fix it via upgrading to nougat 7.0 and only downgrading the modem to 6.0.1, and still no luck , I then tried to make a backup of my cert while on 6.0.1 and then upgrading to 7.0 and the restore the cert backup and still no luck , please let me know if there is any new discoveries.
Thank you in advance.
hello,is the problem solved? i had same problem too,im using s7 edge dual sim.my sim 2 slot work fine but on slot 1 cannot register on network..is Zx3 box truly solution?
It does patch the certificate! So yeah I recommend the z3x box , bought mine on aliexpress
ironman101 said:
It does patch the certificate! So yeah I recommend the z3x box , bought mine on aliexpress
Click to expand...
Click to collapse
thanks dude,will do that on this weekend..
i want to upgrade to android 7....
anyone have solution? how to patch certificate after upgrade if anyone have solution please reply
Eddyboy911 said:
i want to upgrade to android 7....
anyone have solution? how to patch certificate after upgrade if anyone have solution please reply
Click to expand...
Click to collapse
unfortunately no , im also looking for solution, was thinking of making a cert backup on 6.0.1 and then upgrading to 7.0 and restoring the cert , i have not tried it yet so i dont know the outcome
not registered on network
Even i have the same issue any solution for this yet
abdulshakoor02 said:
Even i have the same issue any solution for this yet
Click to expand...
Click to collapse
Unfortunately there is no solution to this issue yet but if you stay on 6.0.1 you can just use a cert patch and it works 100%, for android 7.0 we must just wait for an update from z3x
Sent from my SM-G930F using Tapatalk
ironman101 said:
Unfortunately there is no solution to this issue yet but if you stay on 6.0.1 you can just use a cert patch and it works 100%, for android 7.0 we must just wait for an update from z3x
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
But tgis should be resolved by samsung i dont have any issues its my phone with imei number amd everything same as on box but still this issue its not done and do i ahve to buy z3x box or can i get it fixed from someone thanks for your help bro anyways

SM-G935FD wont connect to network/carrier after routing to Nougat 7.0 with odin

Please someone help me, i was updating my s7 edge duos to 7.0 after that i cannot join network, wifi works well and got signal also but cant connect for some reason shows Emergency Calls Only i tried many roms and with every single i got no network, nothing helps.. when i check dial 06# my both imeis are OK and nothing is wrong with it..
maybe i flashed wrong modem or something and how can i repair it now? please help
Provide more details of your phone , are you using original stock rom ? Or rooted custom rom? You may try changing sim , or wiping cache partition in recovery , if that doesnt work only option is factory reset, also tell if your update was successful without errors ? And use the same firmware as your current region , and also check if your phone is carrier locked , then you need to unlock it to work or use the same carrier firmware.
bachimpek said:
Please someone help me, i was updating my s7 edge duos to 7.0 after that i cannot join network, wifi works well and got signal also but cant connect for some reason shows Emergency Calls Only i tried many roms and with every single i got no network, nothing helps.. when i check dial 06# my both imeis are OK and nothing is wrong with it..
maybe i flashed wrong modem or something and how can i repair it now? please help
Click to expand...
Click to collapse
Hi Bachimpek
Seems like you need to patch your certificate , try to downgrade to 6.0.1 and see if phone can connect to network if that doesnt work then you need to patch your certificate with a box like "z3x" or "octipus"
Sent from my SM-G930F using Tapatalk
shah22 said:
Provide more details of your phone , are you using original stock rom ? Or rooted custom rom? You may try changing sim , or wiping cache partition in recovery , if that doesnt work only option is factory reset, also tell if your update was successful without errors ? And use the same firmware as your current region , and also check if your phone is carrier locked , then you need to unlock it to work or use the same carrier firmware.
Click to expand...
Click to collapse
I have flashed to stock rom from sammobile, for region serbia, and after that i changed to many different countryies, nothing helps, i wiped cache and factory reset, nothing of that helped me , it was sucessfull without errors, my carrier is not locked because i used all carriers in previous android 6.0.1
ironman101 said:
Hi Bachimpek
Seems like you need to patch your certificate , try to downgrade to 6.0.1 and see if phone can connect to network if that doesnt work then you need to patch your certificate with a box like "z3x" or "octipus"
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
already tried doesent helping downgrade, can you give me proper links to download that programs, or i need to go to service to be finished with jtag?
bachimpek said:
already tried doesent helping downgrade, can you give me proper links to download that programs, or i need to go to service to be finished with jtag?
Click to expand...
Click to collapse
So , you want to downgrade ? Just download a complete firmware file with all files included and flash it with odin, it will downgrade , if it solves the problem , maybe stay with it instead of nougat.
shah22 said:
So , you want to downgrade ? Just download a complete firmware file with all files included and flash it with odin, it will downgrade , if it solves the problem , maybe stay with it instead of nougat.
Click to expand...
Click to collapse
tried doesent help.. after that i set to custom rom.. problem still appears.. can it be fixed without BOX?
bachimpek said:
tried doesent help.. after that i set to custom rom.. problem still appears.. can it be fixed without BOX?
Click to expand...
Click to collapse
Don't seems so , you need to repair it in z3x or octoplus box , but if network was working well before update to nougat , it should work when you downgraded again to 6.0.1 , so i guess its some certificate issue , but you may check some setting and try to search networks manually and try changing network type to 3g/2g , 3g only , 2g only. Also try checking different sim cards. If it did'nt fix then you have to repair by box. Good luck
Sent from my S7 Edge using XDA Labs
Hello, same problem samsung s7 edge SM-G935FD. restarted my phone and no network. My region is Lithuania and i cant find firmware of my country, what to do ?

Samsung S8 G90f Wont connect to network!

hi all
i was advised by a friend to post my issue on this forum as someone here will always have the answer after searching the net without any luck.
i have a uk model s8 on the o2 network which was originally locked to o2.
so i took it the local market to get it unlocked which the market trader did and it accepted another uk sim
but wont connect to any network now. states emergency calls only, even with my original o2 sim.
i cant even search for any networks. when you try to search for networks by choosing the phone option, nothing happens, just states not available at this time. same thing when you try to choose manual or automatic search.
it accepts any sim now but wont connect to any network.
i thought it may have been barred even though i bought it 2nd hand and had it over 8 months so i checked imei on the net and it comes up clean. so not barred.
went back to market and the street trader said he will flash with firmware to fix. he said it was running latest firmware, android 8.0 dec 2018 G950FXXS4CRLB [december 2018, revB]
but will flash G950FXXU4CRL3 [december 2018, rev3]
but that did nothing. he said he wasnt sure why the phone is not getting a signal and confirmed it was definitely not barred.
he couldnt also understand why you cannot search network, why this option cannot be selected.
so this is where i am.
any help or guidance would be appreciated
regards,
Margaret acey
can anyone help?
ace.1 said:
can anyone help?
Click to expand...
Click to collapse
Did you check IMEI online or wih the original provider sometimes online services don't show blocked imeis I have a US model rooted and sometimes the radio crashes and and have similar issues. I have to reinstall the CP and csc from the firmware files to get it back up. Using the latest Odin and firmware. I assume your on the latest firmware
thankyou for your reply,
i have not checked with network but i have tried multiple websites who offer imei checking services and they all show clean imei.
in respect of firmware,
it was running the latest firmware which was android 8.0 dec 2018 G950FXXS4CRLB [december 2018, revB] which didnt work
then the market trader flashed an earlier version, stil android 8.0 but two weeks earlier version, ending with CRL3 and that has not worked either. so at the moment its on that version.
both these were released by samsung in december 2018 but neither work,
so i dont know what to do.
Margaret
so im s
ace.1 said:
thankyou for your reply,
i have not checked with network but i have tried multiple websites who offer imei checking services and they all show clean imei.
in respect of firmware,
it was running the latest firmware which was android 8.0 dec 2018 G950FXXS4CRLB [december 2018, revB] which didnt work
then the market trader flashed an earlier version, stil android 8.0 but two weeks earlier version, ending with CRL3 and that has not worked either. so at the moment its on that version.
both these were released by samsung in december 2018 but neither work,
so i dont know what to do.
Margaret
so im s
Click to expand...
Click to collapse
I would take it back to the individual who unlocked it. It worked before and not after.
yes i did that but he said he did the unlocking and that has worked so is not taking responsibility for the signal. so i have to fix myself.
can anybody offer any help on what to do please.
Does it matter which mode you select? e.g. are you able to choose 2G/3G/4G autoconnect?
My S8 suddenly lost connection to just the Vodafone 3G network in Australia but is able to connect to other carriers on the 3G network fine.
Mautje said:
Does it matter which mode you select? e.g. are you able to choose 2G/3G/4G autoconnect?
My S8 suddenly lost connection to just the Vodafone 3G network in Australia but is able to connect to other carriers on the 3G network fine.
Click to expand...
Click to collapse
it wont let me select anything, any mode at all.
when you select option, nothing happens, it doesnt go into that option.
ive have a message from a member on this forum, named "ZeroXO" who said he can fix this but waititng for him to get back to me.
he said he knew what the problem was, took my imei no last night and said he will get back to me. so hopefully he will find a solution for me.
ace.1 said:
it wont let me select anything, any mode at all.
when you select option, nothing happens, it doesnt go into that option.
Click to expand...
Click to collapse
Ok that's not even as far as I got.
I went back one firmware version to the one that I was running before the one that started developing the issue (although it ran fine for a week or 2 after the update) that didn't help.
I forgot if you tried to go back to an older one as well or tried one of the country specific ones. You need to check if you've got the snapdragon or the equinox version though.
Hopefully the other guy manages to fix your issue
Thankyou for your kind words and advice.
I changed firmwares a couple of times all 8.0.0 but no luck.
Ive got a member from this forum currently trying to fix it as we speak. He has made a lot of progress and clearly know his stuff and happy to have his help and assistance so hopefully it will be fixed today so ill keep you updated and let you know how i got on.
Thanks
margaret
Can i also extend my thanks to another member named pblim (not sure if i have spelt that right)
Who helped me yesterday to show me how to hide root.
Fantastic help and advice from him. Very kind
Highly recommended member.
So thanks mate.
Regards
Margaret.

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