Database Users

NO service plz help

i have one nexus 4 purchased from Ebay. it has
4.4.2 OS STOCK,
base band M9615A-CEFWMAZM-2.0.1700.97
KERNEL 3.4.0-perf-g2cae413 WED nov 20 14:54:28 PST 2013
build number KOT49H
it has unlocked bootloader, rooted, twrp installed.
it is able to show me IMEI number in about phone and as well as on dialer *#06#
now the problem is, when i insert sim card, it show me no service and no signal in status bar.
so not able to use phone.
kindly help me

Flash the latest factory image.
My N7's baseband version is M9615A-CEFWMAZM-2.0.1700.98, so I think you have the 4.3 baseband which is incompatible with the 4.4 roms, that's why you don't get service.

arunkarnwal1981 said:
i have one nexus 4 purchased from Ebay. it has
4.4.2 OS STOCK,
base band M9615A-CEFWMAZM-2.0.1700.97
KERNEL 3.4.0-perf-g2cae413 WED nov 20 14:54:28 PST 2013
build number KOT49H
it has unlocked bootloader, rooted, twrp installed.
it is able to show me IMEI number in about phone and as well as on dialer *#06#
now the problem is, when i insert sim card, it show me no service and no signal in status bar.
so not able to use phone.
kindly help me
Click to expand...
Click to collapse
Did you reboot the phone after inserting the Sim card or enable airplane mode on and off?

scream4cheese said:
Did you reboot the phone after inserting the Sim card or enable airplane mode on and off?
Click to expand...
Click to collapse
yes already done but no effect

Erovia said:
Flash the latest factory image.
My N7's baseband version is M9615A-CEFWMAZM-2.0.1700.98, so I think you have the 4.3 baseband which is incompatible with the 4.4 roms, that's why you don't get service.
Click to expand...
Click to collapse
updated it at said baseband but still no service and also phone not searching any network on network selection option

4.4.2 OS STOCK,
base band M9615A-CEFWMAZM-2.0.1700.97
something wrong over there.
stock 4.4.2 comes with .98 radio
stock 4.4 comes with the .97
also what is the bootloader version?
anyway i would recomment flashing stock factory images

arunkarnwal1981 said:
i have one nexus 4 purchased from Ebay. it has
4.4.2 OS STOCK,
base band M9615A-CEFWMAZM-2.0.1700.97
KERNEL 3.4.0-perf-g2cae413 WED nov 20 14:54:28 PST 2013
build number KOT49H
it has unlocked bootloader, rooted, twrp installed.
it is able to show me IMEI number in about phone and as well as on dialer *#06#
now the problem is, when i insert sim card, it show me no service and no signal in status bar.
so not able to use phone.
kindly help me
Click to expand...
Click to collapse
Best solution is try some another "micro sim".
DONT cut it but bring it from your service provider.

Rohit02 said:
Best solution is try some another "micro sim".
DONT cut it but bring it from your service provider.
Click to expand...
Click to collapse
already tried with no luck

From what I know I believe the sim cards can have hardware within 1/16th of an inch from the side, or it might have been 1/8th but yes dont cut the card, um I know it sucks but back up what you can with something like titanium backup, then try undoing what could be the cause, so flash stock rom. With titanium backup you just hit backup/restore then the checkmark in the top right then scroll way down and hit restore apps/missing apps+sys data... if it fixes the problem then great but put a copy of the backup on your computer in case the extsdcard gets wiped too for some reason or in case you have to send it in
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

mejakola said:
From what I know I believe the sim cards can have hardware within 1/16th of an inch from the side, or it might have been 1/8th but yes dont cut the card, um I know it sucks but back up what you can with something like titanium backup, then try undoing what could be the cause, so flash stock rom. With titanium backup you just hit backup/restore then the checkmark in the top right then scroll way down and hit restore apps/missing apps+sys data... if it fixes the problem then great but put a copy of the backup on your computer in case the extsdcard gets wiped too for some reason or in case you have to send it in
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
nothing going on.
i installed stock 4.3 but still same issue.

arunkarnwal1981 said:
nothing going on.
i installed stock 4.3 but still same issue.
Click to expand...
Click to collapse
how did you install it?
what about 4.4.2?
are you flashing roms of it or using a software on your computer?
its been a while since i was ontop of an htc

mejakola said:
how did you install it?
what about 4.4.2?
are you flashing roms of it or using a software on your computer?
its been a while since i was ontop of an htc
Click to expand...
Click to collapse
i use following method to downgrade
http://forum.xda-developers.com/nexus-4/general/how-to-how-to-flash-factory-image-t2010312

Ill ponder for a while and see if I can brainstorm a solution, ill ask around a bit and see what I come up with,
If your worried about your warranty and your carrier won't help you, I suggest going to best buy and letting the Samsung guys take a crack at it, they have the proper software to find the problem.

OK when you first got the phone was the sim working?
Is it a carrier specific device?
If yes are you using a sim card from that carrier?
Is the phone unlocked or factory unlocked or is it locked?
Was there any thing you did such as flashing custom roms?
I think it may have a bad Imei but I'm still trying to figure that out

mejakola said:
OK when you first got the phone was the sim working?
Is it a carrier specific device?
If yes are you using a sim card from that carrier?
Is the phone unlocked or factory unlocked or is it locked?
Was there any thing you did such as flashing custom roms?
I think it may have a bad Imei but I'm still trying to figure that out
Click to expand...
Click to collapse
yes it was working.
today again i downgrade to 4.2.2 but still same issue.
i was noticed that when i use *#*#4636#*#* > phone information> it show me UNKNOWN in set preferred network type and none of type is selectable
but when i switch off radio then i am able to select network type and phone sow me my carrier but no signal due to radio is off. after switch on radio same condition. and no service.
as i am in india so i do not think that blaclist issue matter but i check and imei is clear.

arunkarnwal1981 said:
yes it was working.
today again i downgrade to 4.2.2 but still same issue.
i was noticed that when i use *#*#4636#*#* > phone information> it show me UNKNOWN in set preferred network type and none of type is selectable
but when i switch off radio then i am able to select network type and phone sow me my carrier but no signal due to radio is off. after switch on radio same condition. and no service.
as i am in india so i do not think that blaclist issue matter but i check and imei is clear.
Click to expand...
Click to collapse
dont know if you ever got your issue fixed or not, i had a similar problem the other day on my galaxy s4 i337
i was able to make phone calls and recieve text messages but i could not access the internet through the network, my carrier actually did something that helped but didnt fix it... the technical support team had me turn off the phone and then they erased me from the network, so when i turned the phone back on the phone rebuilt the network through the sim card and for some reason i have better reception now...
i still could not connect to the internet via wifi or mobile network so i factory wiped and installed the stock firmware.
do you have somewhere to go where they can "officially" flash the stock firmware? here in the usa i can take my phone to BestBuy, a large electronics dealer, and they have a samsung area that the people have the tools to do so.
maybe your network carrier can help you, maybe its not a phone issue but rather a network provider issue.

mejakola said:
dont know if you ever got your issue fixed or not, i had a similar problem the other day on my galaxy s4 i337
i was able to make phone calls and recieve text messages but i could not access the internet through the network, my carrier actually did something that helped but didnt fix it... the technical support team had me turn off the phone and then they erased me from the network, so when i turned the phone back on the phone rebuilt the network through the sim card and for some reason i have better reception now...
i still could not connect to the internet via wifi or mobile network so i factory wiped and installed the stock firmware.
do you have somewhere to go where they can "officially" flash the stock firmware? here in the usa i can take my phone to BestBuy, a large electronics dealer, and they have a samsung area that the people have the tools to do so.
maybe your network carrier can help you, maybe its not a phone issue but rather a network provider issue.
Click to expand...
Click to collapse
thanks for reply but my problem is , there is no network so no
phone
calls or msg. I already tried many sim card cutted and non
cutted
both. something is bad with radio.

arunkarnwal1981 said:
thanks for reply but my problem is , there is no network so no
phone
calls or msg. I already tried many sim card cutted and non
cutted
both. something is bad with radio.
Click to expand...
Click to collapse
Mkay I'm not real sure about that so I would check the forums for your phone and see what you can find since you narrowed down the problem
---------- Post added at 02:41 AM ---------- Previous post was at 02:31 AM ----------
arunkarnwal1981 said:
thanks for reply but my problem is , there is no network so no
phone
calls or msg. I already tried many sim card cutted and non
cutted
both. something is bad with radio.
Click to expand...
Click to collapse
Mkay I'm not real sure about that so I would check the forums for your phone and see what you can find since you narrowed down the problem
Best of luck
to you

It's a little bit strange but you can try to use an adhesive tape on the side of sim card to prevent a short circuit between contacts and the sim card's metalic tray.
It worked for me.

[Q] No sim card detected

**

mquarmoc said:
Hi everyone,
I messed a bit with my d802 and finally i used the lg support tool to get it back to stock, but now it can't read my sim card all of a sudden (no sim card inserted).
So the question is where are the sim card files, in the kernel or the rom or the baseband ? and how to get them back so it reads my sim card.
I'd be happy to bring you more info on the problem.
Thanks in advance.
Click to expand...
Click to collapse
I had the same problem, reflashing the 10B firmware then upgrading to the OTA 12A fixed the issue.

**

mquarmoc said:
Hi everyone,
I messed a bit with my d802 and finally i used the lg support tool to get it back to stock, but now it can't read my sim card all of a sudden (no sim card inserted).
So the question is where are the sim card files, in the kernel or the rom or the baseband ? and how to get them back so it reads my sim card.
I'd be happy to bring you more info on the problem.
Thanks in advance.
Click to expand...
Click to collapse
in which country do you live?

**

mquarmoc said:
hey abdulmuhaimin, thanks for your answer, my country is france with the operator named "Free"
Click to expand...
Click to collapse
Did you sort this?
If not try this
Power OFF the phone. Remove the SIM card completely for at least 1 minute.
Re-insert the SIM card, Power ON.
If it works, I'll tell you why...

LenAsh said:
Did you sort this?
If not try this
Power OFF the phone. Remove the SIM card completely for at least 1 minute.
Re-insert the SIM card, Power ON.
If it works, I'll tell you why...
Click to expand...
Click to collapse
Thanks, worked for me! Perfect .
New LG L22.

lolo9393 said:
Thanks, worked for me! Perfect .
New LG L22.
Click to expand...
Click to collapse
OK - good. This is a fairly common "problem" when making significant ROM changes - but doesn't always happen.
In basic terms...
When the phone is powered OFF, it isn't actually completely OFF. Some "parts" are still powered. The SIM card and its register are "parts" that remains powered and the register is sometimes overwritten when a ROM is flashed. This means when the new ROM boots, the SIM card and the register are different, hence no network as the phone assumes a fault.
The SIM card needs to be removed with the power off (NEVER with it on) so the phone detects a SIM swap and the register is refreshed.
TIP: Before flashing a new ROM - always remove the SIM card (with the Power OFF).

**

LenAsh said:
Did you sort this?
If not try this
Power OFF the phone. Remove the SIM card completely for at least 1 minute.
Re-insert the SIM card, Power ON.
If it works, I'll tell you why...
Click to expand...
Click to collapse
Hi, I have that problem and it actually works (by removing the SIM and power off for 1 min), but sometimes do not work, can you tell me more about the problem? Thanks

I had the same problem and it worked fine for me, thank you.

Hey, anyone else with this problem?
My g2 suddenly stopped to recognize my sim card.... everything else works properly...
Should i format the phone? Or it would be a hardware problem?

I have the same problem with a F320S any solution?

I solved my problem formatting the mobile

No SIM CARD after official lollipop stock rom update
Hi,
I have updated my LG G2 F320L (Korean Version by UPlus) on Lollipop successfully.
But now my SIM Card is not detecting. I am in Pakistan and dont know what to do now.
I tried to restart the phone with no sim and with sim and also flashed the same stock rom again but still no sim card.
I also tried to put the following codes i.e. for IMEI *#06# and for SIM Unlock menu 2945#*320# which didn't work too.
I also did factory reset many times with sim and without sim.
Tried to do rooting throguh Towelroot and Stumproot but no success.
Dear All, Please help as what might be the problem.

LenAsh said:
Did you sort this?
If not try this
Power OFF the phone. Remove the SIM card completely for at least 1 minute.
Re-insert the SIM card, Power ON.
If it works, I'll tell you why...
Click to expand...
Click to collapse
thanks but this did not work on my device
and i made 4 custom ROMs for this device and all my ROMs dont detect SIM card at all
i need some help.

3GGamer said:
Hi,
I have updated my LG G2 F320L (Korean Version by UPlus) on Lollipop successfully.
But now my SIM Card is not detecting. I am in Pakistan and dont know what to do now.
I tried to restart the phone with no sim and with sim and also flashed the same stock rom again but still no sim card.
I also tried to put the following codes i.e. for IMEI *#06# and for SIM Unlock menu 2945#*320# which didn't work too.
I also did factory reset many times with sim and without sim.
Tried to do rooting throguh Towelroot and Stumproot but no success.
Dear All, Please help as what might be the problem.
Click to expand...
Click to collapse
Unfortunately I don't have a solution yet, but I wanted to point out that I am in the same situation ATM. German lg g2 though. Please any new input would be highly appreciated.

Issue Resolved
Hi I took the phone to the android expert in mobile market in my area SADDAR AREA-RAWALPINDI CITY-PAKISTAN. Where he highlighted that the ROM, Baseband and Radios where not compatible as well as my phone had some EEPROM problem as well. So he hooked a small box like USB device and pushed the ROM into it via OTG along with the new stock ROM. Now my phone is working perfectly fine and I am more than happy and thankful to the expert. My current stock ROM is lollipop version: 5.0.1
majamee said:
Unfortunately I don't have a solution yet, but I wanted to point out that I am in the same situation ATM. German lg g2 though. Please any new input would be highly appreciated.
Click to expand...
Click to collapse

LenAsh said:
Did you sort this?
If not try this
Power OFF the phone. Remove the SIM card completely for at least 1 minute.
Re-insert the SIM card, Power ON.
If it works, I'll tell you why...
Click to expand...
Click to collapse
I know this thread is hella old but, I stumbled upon this (after returning to the G2 temprorarliy - had it back in 2013/14) after restoring a stock LG ROM backup and it wasn't recognizing my SIM card. Anyways, this method worked for me to get the phone to recognize my SIM. Thanks for posting this.

t3chn0s1s said:
I know this thread is hella old but, I stumbled upon this (after returning to the G2 temprorarliy - had it back in 2013/14) after restoring a stock LG ROM backup and it wasn't recognizing my SIM card. Anyways, this method worked for me to get the phone to recognize my SIM. Thanks for posting this.
Click to expand...
Click to collapse
continuing the hella old trend.... this fix did not work for me

No SIM - Insert Sim card

hey guys,
I have just gotten my phone back from repair. It was getting the cracked lCD replaced.
So i went and put my SIM card into the SIM slot then i rebooted my phone, just to see a "No SIM" message which then proceeded to say "Insert SIM card". My wifi and everything is working and i can make emergency calls. I have previously had problems with my EFS folder and a corrupt IMEI but i fixed that issue and i don't believe that these two incidents are related whatsoever.
This is the thread with all of the information of my last problem. http://forum.xda-developers.com/galaxy-s5/help/service-t2898890
To try and solve this new problem, i have done the following:
1. Taken the sim card out and restarted phone and entered the sim card back in numerous times in various different sequences.
2. Done a full factory reset, reflashed a new rom, modem and bootloader.
3. Restored the EFS folder.
4. Tried a different SIM card.
This could be a hardware issue, but i feel as though it is software related, but i am no genius so i am open to any suggestions as to what it may be and how i may be able to fix it. If i am not able to fix it i will just send it back to the phone repairers and see what they can do to resolve the problem, but that would be the last thing i want to do.
thanks for any help.

not to worry. I have now solved the problem and everything is working perfectly.

1221ross1221 said:
not to worry. I have now solved the problem and everything is working perfectly.
Click to expand...
Click to collapse
And you did this by doing what?
Having the exact same issue on an S4 mini.

DSwarP said:
And you did this by doing what?
Having the exact same issue on an S4 mini.
Click to expand...
Click to collapse
i was on android 4.4.2 thouchwiz, i then upgraded to android 5, which also meant i had to upgrade the modem, which seemed to fix the problem. I then downgraded back down to android 4.4.2 touchwiz and that solved the problem.
so maybe you could try upgrading your modem or something? let me know if that works.

1221ross1221 said:
i was on android 4.4.2 thouchwiz, i then upgraded to android 5, which also meant i had to upgrade the modem, which seemed to fix the problem. I then downgraded back down to android 4.4.2 touchwiz and that solved the problem.
so maybe you could try upgrading your modem or something? let me know if that works.
Click to expand...
Click to collapse
By modem do you mean radio?
It's an unrooted phone in my case, unfortunately.

the modem is a file or software i guess you could say in which controls the the signal on your phone.
hmmmm, im not sure what you could do then... im guessing you do not plan on rooting either?

Nokia 6(TA-1000) cellular network not work after Android Oreo

I just upgrade my Nokia 6(TA-1000) to official Android 8.0.0 (Oreo).
Then my Cellular network won't work anymore.
I live in Hong Kong, using sim card service "CMHK".
I think it is LTE/WCDMA mode.
Tried "*#*#4636#*#*" and changing the settings.
But the connection always shown IPv4: Failed(2)
The phone notification show it is connected and running 3G network.
But the upload/download speed is always 0KB/s.
Reset to factory setting already.
Before upgrade Android everything work fine.
Anyone have the same problems?
Now, what can i do....?
It seems I can't even downgrade my Android.
Only, have to wait for next update and hope it will fixed?
I think i am screwed.

Alvin Fung said:
I just upgrade my Nokia 6(TA-1000) to official Android 8.0.0 (Oreo).
Then my Cellular network won't work anymore.
I live in Hong Kong, using sim card service "CMHK".
I think it is LTE/WCDMA mode.
Tried "*#*#4636#*#*" and changing the settings.
But the connection always shown IPv4: Failed(2)
The phone notification show it is connected and running 3G network.
But the upload/download speed is always 0KB/s.
Reset to factory setting already.
Before upgrade Android everything work fine.
Anyone have the same problems?
Now, what can i do....?
It seems I can't even downgrade my Android.
Only, have to wait for next update and hope it will fixed?
I think i am screwed.
Click to expand...
Click to collapse
Why dont you hard reset your device, this could help you
Hard reset is done by recovery menu.
Hope this couls work for you

sltushar said:
Why dont you hard reset your device, this could help you
Hard reset is done by recovery menu.
Hope this couls work for you
Click to expand...
Click to collapse
I already do factory reset on System Settings.
I think it is the same as reset on recovery menu.
It still Android 8.0.0 and problem still exists.

Alvin Fung said:
I already do factory reset on System Settings.
I think it is the same as reset on recovery menu.
It still Android 8.0.0 and problem still exists.
Click to expand...
Click to collapse
No, there is a lot difference between system reset(soft reset) and recovery reset (hard reset)
Try it, may be it solve your problem

sltushar said:
No, there is a lot difference between system reset(soft reset) and recovery reset (hard reset)
Try it, may be it solve your problem
Click to expand...
Click to collapse
Tried. No luck, the problem still exists.

It seems you ****ed up modem firmware. What's the baseband version and build number from About?

Alvin Fung said:
I just upgrade my Nokia 6(TA-1000) to official Android 8.0.0 (Oreo).
Then my Cellular network won't work anymore.
I live in Hong Kong, using sim card service "CMHK".
I think it is LTE/WCDMA mode.
Tried "*#*#4636#*#*" and changing the settings.
But the connection always shown IPv4: Failed(2)
The phone notification show it is connected and running 3G network.
But the upload/download speed is always 0KB/s.
Reset to factory setting already.
Before upgrade Android everything work fine.
Anyone have the same problems?
Now, what can i do....?
It seems I can't even downgrade my Android.
Only, have to wait for next update and hope it will fixed?
I think i am screwed.
Click to expand...
Click to collapse
Have you tried other SIM cards, whether you work in your cell phone! Tried to register your network operator service in the settings! Set preferred network ~
---------- Post added at 11:04 AM ---------- Previous post was at 10:57 AM ----------
Have you tried other SIM cards, whether you work in your cell phone! Tried to register your network operator service in the settings! Set preferred network ~

qwertysmerty said:
It seems you ****ed up modem firmware. What's the baseband version and build number from About?
Click to expand...
Click to collapse
I use official update.
All firmware should be correct?
BTW, I get a new sim card from ISP but cellular network still not working.
Also, tried both sim card slot 1 and slot 2 nothing work.
May be new system not compatible with my SIM card service only which is "CMHK" aka "中國移動香港".
Hope next update will fix that...
Device name:
Nokia 6
Model
TA-1000
Android version
8.0.0
Android security patch level
January 1, 2018
Baseband version
MPSS.JO.3.0-00387-8937_GENNS_PACK-1.124813.1.126605.3
Kernel version
3.1.8.66-perf
Fri Jan 12 19:48:46 CST 2018
Camera firmware version
V100.0230.05
V010.0210.10
Touch panel firmware version
ilitek-V10010
Goodix-v1.05.29-HV
Build number
00CN_5_210

Baseband version looks good. I was just wonder if your ta-1000 ever had ta-1003 firmware installed. Don't know what's wrong with radio on your phone, sorry.

I have same problem in my Nokia 6 TA1003 after upgraded to 8.0
The CMHK sim in sim 2 slot the cellular network can work. sim 1 slot install other ISP sim card is no problem.
Just put the CMHK in sim 1 slot only run 3G voice services and cellular network not work.

NOKIA 6
hi,
i updated my nokia 6 TA-1000 to oreo update.
i faced many issues like lte not working.
in battery saver mode launcher is stopping suddenly.
it is not detecting the sim correctly.
i didnt get network signals correctly.
Then i tried to hard reset my mobile ,after complete reset and after rebooting it stopped at language selection,i clicked lets go many times but it is not working .it got stucked there.
is there anyway to get rid of it.i asked for nokia chat support but they are asking me to take mobile to nearest service center.
if there is any solution please guide me with it .thank you in advance.

I just turn off the cellular network yesterday.
After I wake up from bed, my phone Google service can not connect from wifi(can't use email, Google store).
BUT! After reinsert my sim card and turn back on cellular network, everything working now.
Both 4G cellular and Google service all good.
May be some part of the network is cached.
So, if you encounter this problem just turn off cellular network and wait.

BenSo2111 said:
I have same problem in my Nokia 6 TA1003 after upgraded to 8.0
The CMHK sim in sim 2 slot the cellular network can work. sim 1 slot install other ISP sim card is no problem.
Just put the CMHK in sim 1 slot only run 3G voice services and cellular network not work.
Click to expand...
Click to collapse
It seems that, the old slot 1 cached your sim card.
So, you change to slot 2 work, but you can't use SD card.
And I found that if you wait a long time the cache will clear.
You can try to insert sim card back to slot 1 after 1-2 days.

gamez cliq said:
hi,
i updated my nokia 6 TA-1000 to oreo update.
i faced many issues like lte not working.
in battery saver mode launcher is stopping suddenly.
it is not detecting the sim correctly.
i didnt get network signals correctly.
Then i tried to hard reset my mobile ,after complete reset and after rebooting it stopped at language selection,i clicked lets go many times but it is not working .it got stucked there.
is there anyway to get rid of it.i asked for nokia chat support but they are asking me to take mobile to nearest service center.
if there is any solution please guide me with it .thank you in advance.
Click to expand...
Click to collapse
The only option was left to flash stock firmware, but as it updated to oreo, its bootloader has also been updated so I will suggest you to wait for official oreo firmware to release, please don't try to downgrade your device for now, it can brick your device very badly, keep patience, if any solution will come out, we will definitely tell you

Sim detecting issues of Nokia 6
Have you got it fixed now?
I'm also having the same problem, and tell me how did you do it?

Nevklear said:
Have you got it fixed now?
I'm also having the same problem, and tell me how did you do it?
Click to expand...
Click to collapse
Yes, I got it fixed...
1) Just turn off your cellular network.
2) Wait for 1-2 days.
3) Turn on your cellular network again, it should work.

How can I off cellular network. Will keeping it in flight mode helps?

Alvin Fung said:
Yes, I got it fixed...
1) Just turn off your cellular network.
2) Wait for 1-2 days.
3) Turn on your cellular network again, it should work.
Click to expand...
Click to collapse
Thank you for raising this question. My phone got the same problem. I am just wondering if I should send it to maintenance center but I guess they will just do reset.
And by saying "turn off cellular network and wait for 1-2 days", do you mean by just turning off the data usage, or turning it to flight mode/ turning the phone.

Nevklear said:
Have you got it fixed now?
I'm also having the same problem, and tell me how did you do it?
Click to expand...
Click to collapse
I just read a comment from a forum in HK and some members find a way to fix the problem. I tried it and it is successful.
{lihkg.com/thread/544787/page/1?ref=web&post=20}

i face same problem .. Nokia care told me that your phone motherboard problem

No service on my phone

Hello there,
i have an unlocked variant essential phone (openus) and i can't use my sims in it , i always get no service on whatever sim card i put in it, sim card is recognized and i get apn sets up correctly( check attached photos) . I flashed back to stock several times i always have the same issue . Can anyone who has openus variant share his modem partitions files!!!!
Thanks to everyone, i'm waiting for help (i'm without phone for about 10 days looking for a solution)

Rwin01 said:
Hello there,
i have an unlocked variant essential phone (openus) and i can't use my sims in it , i always get no service on whatever sim card i put in it, sim card is recognized and i get apn sets up correctly( check attached photos) . I flashed back to stock several times i always have the same issue . Can anyone who has openus variant share his modem partitions files!!!!
Thanks to everyone, i'm waiting for help (i'm without phone for about 10 days looking for a solution)
Click to expand...
Click to collapse
Turn off enhanced 4g...
Also...
It appears your carrier does not have LTE? If that's true try cycling thru the mobile network toggles in that same menu

rignfool said:
Turn off enhanced 4g...
Also...
It appears your carrier does not have LTE? If that's true try cycling thru the mobile network toggles in that same menu
Click to expand...
Click to collapse
my carrier support LTE , i did turn it off but i still have the same issue ,

Rwin01 said:
my carrier support LTE , i did turn it off but i still have the same issue ,
Click to expand...
Click to collapse
Does your carrier support 3g?
Try switching preferred network type.to that... Or 2g... Let's get it to connect first...

rignfool said:
Does your carrier support 3g?
Try switching preferred network type.to that... Or 2g... Let's get it to connect first...
Click to expand...
Click to collapse
switeched to 2g 3g.. nothing , still no service

Rwin01 said:
switeched to 2g 3g.. nothing , still no service
Click to expand...
Click to collapse
Go to your dialer put in
*#*#4636#*#*
Choose Phone Info
On the top half of the menu... Above the Ping Test button... Are any of the entries empty?

rignfool said:
Go to your dialer put in
*#*#4636#*#*
Choose Phone Info
On the top half of the menu... Above the Ping Test button... Are any of the entries empty?
Click to expand...
Click to collapse
mobile radio power is always off even if turn it on , unknown network as well

Rwin01 said:
mobile radio power is always off even if turn it on , unknown network as well
Click to expand...
Click to collapse
Is this an old sim card?
What variant do you have according to the bootloader?
Try removing your sim card... Boot the device... And see if the mobile radio can turn on with no card installed...

rignfool said:
Is this an old sim card?
What variant do you have according to the bootloader?
Try removing your sim card... Boot the device... And see if the mobile radio can turn on with no card installed...
Click to expand...
Click to collapse
VARIANT is OPENUS
sim card was working on the same phone last week before stopped , i tried another sim different carrier the same issue.
sim card out , mobile radio can turn on but you go back and enter to phone info again , it's off

Rwin01 said:
VARIANT is OPENUS
sim card was working on the same phone last week before stopped , i tried another sim different carrier the same issue.
sim card out , mobile radio can turn on but you go back and enter to phone info again , it's off
Click to expand...
Click to collapse
Did this happen after you updated to 9.0 Pie? Because My phone (Sprint model, flashed firmware to unlock) didn't recognize mi SIM after I took the update.
Where did you buy the phone? Are you absolutely it sure it was not a Sprint phone?
Anyways, I had to flash back to an old firmware, flash a couple of modem files, and now my SIM is recognized again.
I did what this gentleman did...
https://forum.xda-developers.com/showpost.php?p=75681830&postcount=314

thepolishguy said:
Did this happen after you updated to 9.0 Pie? Because My phone (Sprint model, flashed firmware to unlock) didn't recognize mi SIM after I took the update.
Where did you buy the phone? Are you absolutely it sure it was not a Sprint phone?
Anyways, I had to flash back to an old firmware, flash a couple of modem files, and now my SIM is recognized again.
I did what this gentleman did...
https://forum.xda-developers.com/showpost.php?p=75681830&postcount=314
Click to expand...
Click to collapse
sprint lock shows "invalid sim" if i'm not wrong , mine is unlocked version and i did ask sprint "i will attach their reply"

had issues calling only certain people and as someone metioned i tured off the " enhanced 4G" and it works fine now, my carrier supports it but it seems buggy...maybe need a we need "official carrier" for it tot work right.
im personally on Tmobile and everything works fine now. I guess its called HD or advanced calling that i had to disable. i attached screenshots. hope it helps someone