Develop Bugs

[Q] Galaxy Nexus No Signal (unrooted-stock)

I dropped my Verizon Nexus, and now it seems the only thing that's broken is the cell service, 3G, 4G, etc. There is no ability to make any phone calls, emergency or other. Wifi functions, touchscreen fine, everything else works.
I have unknown under carrier, but baseband is listed as normal. This is an UNROOTED phone, on the latest Jelly Bean version. The signal bar is always "no signal/bars" with a small R over the signal icon. I assume this means roaming, but it can't locate a signal, and says always "searching". I've checked and all the settings are correct, everything enabled, etc.
It seems that the radio is gone, and so Verizon initially said the sim card was bad, but they replaced it and said that wasn't it, and the device had "some sort" of issue. Of course, I told them the truth that it happened after a drop, but since I don't have insurance I'm stuck (back to DINC until this is solved), and Verizon left me on my on in the store, saying essentially, sorry, which I expected.
Does anyone have any idea? The MEID is good, so I don't think the phone is toast, and it's never been rooted or otherwise, all stock from day 1.
Please help me. Thank you.

After googling, some suggest removing the sim and battery for up to 20 minutes to let it reset, then trying it. If not, perhaps it's still under a samsung warranty? Saying it just dropped service...a lie of omission of course.

bodh said:
After googling, some suggest removing the sim and battery for up to 20 minutes to let it reset, then trying it. If not, perhaps it's still under a samsung warranty? Saying it just dropped service...a lie of omission of course.
Click to expand...
Click to collapse
Verizon wouldn't service it, it has a small crack in the screen which wasn't caused by this drop - and I don't have insurance - so I'd imagine Samsung wouldn't either. I'm trying your suggestion. Thank you.

startak11 said:
Verizon wouldn't service it, it has a small crack in the screen which wasn't caused by this drop - and I don't have insurance - so I'd imagine Samsung wouldn't either. I'm trying your suggestion. Thank you.
Click to expand...
Click to collapse
Tried to no avail, still no signal.

startak11 said:
Tried to no avail, still no signal.
Click to expand...
Click to collapse
I accept no responsibility if damage occurs from dissasembling your phone.
That said, I have a vzw gnex and i hate cases. So whenever the thing got scuffed up i just got a new backplate and installed it.
The back plate of the gnex isn't that hard to get off wit a couple of guitar pics and a jewelers screwdriver.
http://www.ifixit.com/Teardown/Samsung+Galaxy+Nexus+Teardown/7182/1
That guide is for a gsm nexus too so it does not show the daughter board
I would check to see that the ribbon cable going from the NAND/Sim-card-tray daughter board is fully steated. BE CAREFUL THOUGH. All of your phones memory (minus ram of course) lives on this daughter board.
http://www.techrepublic.com/photos/...?seq=37&tag=content;siu-container#photopaging
Thats the daughter board.
The blue thing on the left is the connector that mashes down on the motherboard.
Also while your in there you can check the pressure contacts where the phone connects to its antennas that are embedded into the back plate (they just look like sitckers.)

SIM card not detected - then detected again

My phone is constantly failing to detect the sim card, usually if I restart the phone or leave it for enough hours it will "find" it again.
Short of reflashing it I'm not sure if there's any way to determine if this is a software or hardware issue. The phone itself is a refurbished one (thanks to the phones insurance replacing it a few months ago), however it is now out of warranty. If it was a hardware fault, how much would it probably cost?
Thanks, Shaun.

The first thing I'd try is a different SIM card or a different SIM card insert (bit of plastic that the SIM sits in).
Has this always happened since you've had the phone?
or
Has it happened since you flashed the phone?
As for the price of repair I haven't a clue (i do all repairs myself), but my guess is in excess of £150
You may want to provide more information before other, more experienced people, come to your aid.

It's slowly gotten worse over the last few months (the first couple of times I just thought it was a once off bug or something, which is why it's very difficult for me to give you an exact when it happened).
The fact that its gotten worse in itself is leading me to guess its a hardware fault - I could have knocked or dropped it and not remember or something.
I don't have any other SIMs but I'll give flashing it to a different ROM or stock a shot first.

shauntp said:
It's slowly gotten worse over the last few months (the first couple of times I just thought it was a once off bug or something, which is why it's very difficult for me to give you an exact when it happened).
The fact that its gotten worse in itself is leading me to guess its a hardware fault - I could have knocked or dropped it and not remember or something.
I don't have any other SIMs but I'll give flashing it to a different ROM or stock a shot first.
Click to expand...
Click to collapse
I feel as if that is your best best before you go throwing money at it.
Good luck!

Does the phone say no sim card (with icon) or do you lose service?

nor1982 said:
Does the phone say no sim card (with icon) or do you lose service?
Click to expand...
Click to collapse
It has done both, the latter's slightly more common though. Probably more often than both it will momentarily drop out, then come up with a "Preparing SIM card..." message.
Still happening after flashing it with a different ROM. Looks like it's probably hardware :/

Might be coxicial cable that connects the pcb with antenea board they do come off from time to time
Sent from my HTC One X using xda app-developers app

Hi there,
i have a similar problem with my device:
network disconnects sometimes (for some reasons ok, as example when i sit in the underground or other places without gsm network) - but then the services doesnt comes back - i'm complete offline. next behavior: i'm just talking with full gsm bandwidth, and for really no reason i get disconnected -> no network anymore, no service anymore.
can it be a hardware fault or should i try to flash the modem (when possible) ? I'm on the latest HTC firmware, device isnt rooted or flashed... it is as i got it from the market.
thanks for a hint what i can try

See above could be that, what network you on?
Sent from my HTC One X using xda app-developers app

nor1982 said:
See above could be that, what network you on?
Sent from my HTC One X using xda app-developers app
Click to expand...
Click to collapse
I'm on GSM (in Germany the O2 network)

maybe the network fault can be solved:
just have read in the vodafone forum in uk and found a hint from a user, who was taping the back side of the SIM card with 2 stripes of plastic.
Have tried this and report tomorrow here if it solves the issue

Tested with taped SIM card and i can say: it works like a charme

Tmobile Note 2 no network circle crossed out

Hi and thanks for any help that you can provide me.
I bought an Galaxy Note 2 SGH-T889 Tmobile version like 7 months ago from a store or reseller in Toronto Canada, the phone was in theory factory unlock, to use with the Wnmobile network which uses the same frequency as Tmobile. The phone was working until 2 days ago. Well always the phone has issue connecting to the network in some specific areas, specially because the Wind network it's not that good, but during the last 2 weeks I noticed more and more problems and some times it was just disconnected showing a circle with an slash or crossed out. After reboot the phone usually fixed the problem, until 2 days ago I had to do it every 2 hours and then the next day it just was permanent. I tried everything so far:
Remove battery and reboot
Remove battery and SIM card and reboot
Use a diiferent SIM card from my son's phone
Replace for a new SIM card
Clear Cache
Factory Reset
Reflash the modem with Odin
The phone has the latest stock ROM 4.1.2, BASE T889UVBMD1
The problem is Samsung say because it's a Tmobile they can not support it here, I have to send the phone to Samsung USA, I still fighting with the store because they said it will be covered locally, but that is another story.
I red many post talking about similar problems with the Galaxy S3 or S4 and one said that installing Jedi X14 fixed the problem, but to do that I think I have to root the phone, which not be a big problem.
The other weird thing is the phone works using other SIM card GSM, not tested with a LTE SIM.
There is any way to test if the radio/antenna for the WCMDA is disabled or broken
Thanks

fasterfoxy said:
Hi and thanks for any help that you can provide me.
I bought an Galaxy Note 2 SGH-T889 Tmobile version like 7 months ago from a store or reseller in Toronto Canada, the phone was in theory factory unlock, to use with the Wnmobile network which uses the same frequency as Tmobile. The phone was working until 2 days ago. Well always the phone has issue connecting to the network in some specific areas, specially because the Wind network it's not that good, but during the last 2 weeks I noticed more and more problems and some times it was just disconnected showing a circle with an slash or crossed out. After reboot the phone usually fixed the problem, until 2 days ago I had to do it every 2 hours and then the next day it just was permanent. I tried everything so far:
Remove battery and reboot
Remove battery and SIM card and reboot
Use a diiferent SIM card from my son's phone
Replace for a new SIM card
Clear Cache
Factory Reset
Reflash the modem with Odin
The phone has the latest stock ROM 4.1.2, BASE T889UVBMD1
The problem is Samsung say because it's a Tmobile they can not support it here, I have to send the phone to Samsung USA, I still fighting with the store because they said it will be covered locally, but that is another story.
I red many post talking about similar problems with the Galaxy S3 or S4 and one said that installing Jedi X14 fixed the problem, but to do that I think I have to root the phone, which not be a big problem.
The other weird thing is the phone works using other SIM card GSM, not tested with a LTE SIM.
There is any way to test if the radio/antenna for the WCMDA is disabled or broken
Thanks
Click to expand...
Click to collapse
If the phone is working fine with a friends sim card . There is nothing more then a issue with your sim. go to the store and have them to give you a new sim card or flash the one you have. I had that issue similar here with at&t all the time.. sims would just loose network.. The fix for me LEAVE AT&T
Good luck.

Yes, I replaced the SIM card and I got a new one.
Just trying to eliminate all the options, I just did a factory reset again, and put it back the SIM card, located outside in an area where I know there is a strong signal and the phone was able to connect to the network and I install the account ans the apps just to test the data connection and it works fine. I was outside for 20 minutes with no problem. Later go back in the building, as soon I was inside for a few minutes the phone lose connection and the circle is back, then reboot again several times, and the phone does not recognize any network, Searching and no network is available.

Aww you left out that it only does this inside but works outside.. I Would say something is blocking the signal. LIKE maybe the building..
i have two bars in my house 3 on the deck and full signal in my yard ...
its just how it is..

erica_renee said:
Aww you left out that it only does this inside but works outside.. I Would say something is blocking the signal. LIKE maybe the building..
i have two bars in my house 3 on the deck and full signal in my yard ...
its just how it is..
Click to expand...
Click to collapse
But he said it was working in side for many month then all a sudden it doesn't work? I understand I live in a mobile home and reception sucks but that from the start but his was working for couple months. I would say he's phone reception receiver w/e it is or something in the phone is screwing up and it will need repairment or replace or service just taking a dump and getting worse.

jcervantes11 said:
But he said it was working in side for many month then all a sudden it doesn't work? I understand I live in a mobile home and reception sucks but that from the start but his was working for couple months. I would say he's phone reception receiver w/e it is or something in the phone is screwing up and it will need repairment or replace or service just taking a dump and getting worse.
Click to expand...
Click to collapse
You could be right.. or maybe even the provider having issues with that tower .. its a tough thing to figure out..

Thanks for your ideas.
I get tired of trying to figure out was is the problem, so I got a SIM card from a diiferent provider which has the best network coverage and power, and i'ts happending the same, the majority of th etime the strength level is around -110 db even outside, with both providers, so it's the phone.
Now the question is could be possible that the antenna cable got disconnected or broken, (yes I dropped the phone a few times but nothing major) and it was working fine until few days ago. Another option it's some internal hardware is not working normally.
Now I have to find a way to repair becasue Samsung Canada does not want to do it becasue its a Tmobile phone.
Thanks, again.

fasterfoxy said:
Thanks for your ideas.
I get tired of trying to figure out was is the problem, so I got a SIM card from a diiferent provider which has the best network coverage and power, and i'ts happending the same, the majority of th etime the strength level is around -110 db even outside, with both providers, so it's the phone.
Now the question is could be possible that the antenna cable got disconnected or broken, (yes I dropped the phone a few times but nothing major) and it was working fine until few days ago. Another option it's some internal hardware is not working normally.
Now I have to find a way to repair becasue Samsung Canada does not want to do it becasue its a Tmobile phone.
Thanks, again.
Click to expand...
Click to collapse
Anybody with same provider as you? Invite them in you're home see if they have connection. It's best if the person have same phone and same company. Can you send directly to Samsung? I have bad phone service my area with s2 and note 2 but my friend with evo 3d has more bar then me and its made by htc but could be two things ur phone crapping out on you which need repairment or like the guy above said tower signal getting weaker. It is hard to find out. Maybe for now for a bit since it's screw up try a rom but then again rom doesn't control radio settings section but wouldn't harm. Good luck.

I'm having the same issue since last month... but with any SIM card.
The network signal strengh rests between -89 to -110 dBm. (Horrible)
The network type is always UNKNOWN:0.
What I already tried:
- Using other SIM.
- Flashing Stock ROM
- Flashing Custom ROM (CM 10.1)
- Flashing all 5 avaliable modems.
What happens:
When I get VERY close to a network antenna... I can make calls and stuff...
What can be happening:
Hardware issues - T-Mobile latest LTE unlocking update maybe burned my antenna (or some network signal related hardware).
Software issues - Can't see how since I used many variations of ROM/Modem.
I live in Brazil and my network is TIM 47. I have a Samsung Galaxy Note II T889.
If anyone can confirm perfectly to me what composes the T889 antenna components... that would be nice...
I want to buy those parts from eBay and trying fixing my phone.

Thanks for your feedback it's really valuable becasue it's almost the same situation. Today I cleared up the situation with Samsung, if I want to be service under the warranty I have to bring the phone to one of repair centres in USA which it's kind of problem because I can do it only in the weekends but not impossible or what I'm doing tomorrow is to have an assessment by one of the repair centres in Toronto and I have to pay in this case, if it's something reasonable.
In my case I did not update the phone in 2 months at least so it's not software in my case, but one difference could be I got a new job 3 months ago, in my previous job the majority of the time I got 5 bars , I guess the cell tower was close to that place, and in my house the coverage it's good. In my new job, my office it's in the middle of the building, far from the windows, so the signal always was really bad, 0-1 bar.
Wondering if could be possible that a bad connection can burn the antenna or the circuit that controls the connection.
The other thing is there are many customers specially for the Galay S4 complaining about a similar problem, and I did not find any answer on how to fix this problem.
I'll post any update just in case it can help someone else.
Thanks.

Did you try to disable lte and use 4g/3g/2g only?
Sent from my SGH-T889 using xda app-developers app

darekz said:
Did you try to disable lte and use 4g/3g/2g only?
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
Well... I did... and the problem persists.

Try to enable and disable wifi calling.
Sent from my SGH-T889 using xda app-developers app

A also have this problem with T-Mobile Note 2 and have already tried everything you guys have...I guess I got no choice but to request a replacement which sucks because my phone was pristine and worked perfectly otherwise. It's just the damn weak to no signal that's driving me crazy. Especially since I'm paying for premium data coverage and it's pretty much money in the trash every month.

That's it. I made the call and the replacement arrives in a couple days. They offered me the "jump" program. Anyone on that? Is that worth doing on T-Mobile?

I traded an unlocked i317m for a g pro. I just picked up a unlocked t889 as welll. The person with my old i317m want my t889 since hes using simple mobile. Problem is when I went to trade I put his sim in my t899 it wont register on tmobile. Seems its only working with at&t as thats the service I have. Now with the i317m I gave him originally it works with any sim. How is this possible that a unlocked tmobile t889 wont register with his sim on tmobile network but the unlocked i317m works with any sim?

Yesterday I replaced the microUSB module that is connected with the antenna and replaced the SIM card module too.
That did NOT worked.
So... the problems is problably on the mainboard/chipset... too expensive to fix.
Another big hardware failure for Samsung's history.

I've had the replacement for about a week now. So far no signal problems. It's like when I first got my original phone. I'm sticking with the note 2 for at least another 6 months since I joined the jump program. Can't wait to see the note 3 next week

Update just to close this case
Well, after I sent the phone for repair to Samsung USA, I got it back and the problems happened again after a few days, then I sent it back for the second time to Samsung, got it back and the problem happened again after a few weeks. Basically, I'm getting rid of this phone, now the warranty is already expired and half of the time the phone was full of problems with the network.
The lesson in this case is to avoid getting hardware from the first batch (to wait a few months after the launch) or without a long term warranty (3 years), and probably will be my last Samsung device.
:crying:

Diesel-30 said:
Can't wait to see the note 3 next week
Click to expand...
Click to collapse
You mean Note 4, no?

Cellular radio problem

My note 2 shows no bars with a good sim card installed.
and has no service what soevevr.I was thinking its the
radio.but when I remove sim it shows signal and can make an emergency call.
Im stumped.I even Odonda back to stock no help.
any ideas before I start replacing hardware.
iv tried other sim out friends phone and using my sim in backup phone.
Warranty is expired.any help please

Maybe apn needs to be set up??? [emoji782]
Not sure what happen to your phone but from your explanation points to your apn!!
Sent from my T889 using Forum Runner

Bajanman said:
Maybe apn needs to be set up??? [emoji782]
Not sure what happen to your phone but from your explanation points to your apn!!
Sent from my T889 using Forum Runner
Click to expand...
Click to collapse
Ya I checked that its same as my buddy note 2to same carrier. AT&T

Weird! I've been having the same issue lately.
In my case, cellular reception became spotty (completely losing connectivity in areas where I'd never previously had issues in my two years with this phone), and then cut out permanently after I dropped the phone fairly hard. I replaced the antenna (not an easy part to acquire, as I went through three ebay auctions before someone finally sold me the correct part) and it was spotty again for about a week before completely dying out again. I started using a backup phone out of frustration before finding another fully functional SGH-i317 for sale on the cheap, and I ended up combining the parts from the two to make a working phone. One day in, and the only issue is that the phone fails to regain cellular connectivity after leaving a dead zone (a few resets have so far done the trick)
Anyway, I'm far from an expert on this, but just to get the conversation going, here are some things I noticed:
Both my original Note II as well as the used one I purchased are 16 Gb SGH-i317 (AT&T GSM) models stamped N7105 under the Samsung sticker in the battery bay. Both used the OEM blue antenna wire (some Note II variants apparently use white wires of the same length), and the smaller boards at the bottoms of the phones which the antenna plugs into (with the charger port attached) are stamped SGH-i317 rev0.7 R.C94(KH) 25. The only difference I've noticed is that the new model is stamped "LTE #1" on the bezel underneath the motherboard whereas my old one was stamped with a different number (which of course I can't remember now that I've reassembled it)
Not sure if any of these weird little specifics will help anyone else who is having the issue, but I figured I'd put it out there just in case.
For the record, I'm in the same boat as OP after having reset/restored a few times. I also hadn't installed anything new/ominous or modified anything prior to the issue occurring originally.

Thank you.I also read in another thread that the modem drier may be corrupted. So the phone can not communicate width modem.

rexamillion59 said:
Thank you.I also read in another thread that the modem drier may be corrupted. So the phone can not communicate width modem.
Click to expand...
Click to collapse
One other thing if there's a place you can take it to and have them check the sim tray?? Might be a possible fix??
Sent from my T889 using Forum Runner

I would flash the current AT&T modem, then use a few APN'S until you find the best for your area.

Iv been trying the different modems and apns.no luck so far.
Im going to do as Benjamin said and have sim slot checked.
Although it seem it is working because.it shows son when installed.
And nothing when out

You don't mention flashing any custom roms or updates, but assuming you have, the best way to troubleshoot your phone would be to return your phone all the way back to stock. This strategy has cured baseband, gps, headphone issues etc.

Lost Cell Signal after replacing charging port connector.
I have a SGH-i317 NOTE 2 and am experiencing the same issue after replacing the charging port connector.
does anyone know if the charging port connector is related to cell phone signal strength? After replacing this part, i cannot even get a signal indoors and only a weak signal outdoors.
careet said:
Weird! I've been having the same issue lately.
In my case, cellular reception became spotty (completely losing connectivity in areas where I'd never previously had issues in my two years with this phone), and then cut out permanently after I dropped the phone fairly hard. I replaced the antenna (not an easy part to acquire, as I went through three ebay auctions before someone finally sold me the correct part) and it was spotty again for about a week before completely dying out again. I started using a backup phone out of frustration before finding another fully functional SGH-i317 for sale on the cheap, and I ended up combining the parts from the two to make a working phone. One day in, and the only issue is that the phone fails to regain cellular connectivity after leaving a dead zone (a few resets have so far done the trick)
Anyway, I'm far from an expert on this, but just to get the conversation going, here are some things I noticed:
Both my original Note II as well as the used one I purchased are 16 Gb SGH-i317 (AT&T GSM) models stamped N7105 under the Samsung sticker in the battery bay. Both used the OEM blue antenna wire (some Note II variants apparently use white wires of the same length), and the smaller boards at the bottoms of the phones which the antenna plugs into (with the charger port attached) are stamped SGH-i317 rev0.7 R.C94(KH) 25. The only difference I've noticed is that the new model is stamped "LTE #1" on the bezel underneath the motherboard whereas my old one was stamped with a different number (which of course I can't remember now that I've reassembled it)
Not sure if any of these weird little specifics will help anyone else who is having the issue, but I figured I'd put it out there just in case.
For the record, I'm in the same boat as OP after having reset/restored a few times. I also hadn't installed anything new/ominous or modified anything prior to the issue occurring originally.
Click to expand...
Click to collapse

S9 won't Connect to Network After Screen Replacement

I recently had the screen replaced on my S9. Since the replacement, it won't connect to the phone network (O2, UK). It shows that it is picking up a signal, but will not register on the network at all. When I try to register it, the signal strength display immediately drops to zero and I get the message "unable to connect, please try again later". The SIM card that I am using works fine in an old S7.
I have tried:
Dropping to 2G/3G only mode.
Network setting reset.
Deleting and recreating the APN.
Booting to safe mode.
A soft reset.
A factory reset.
Booting to recovery menu and wiping the cache.
All to no avail.
I took the phone back to the man that repaired it, he was able to get his SIM working in the device (after some time spent fiddling with settings), but couldn't get mine to work. He is disclaiming responsibility for the issue as a result of him being able to get it to work.
Is it just that the repairer has damaged the antenna? Or is it something to do with the replacement kit he's installed being incompatible? I've been trying to find out a way to test the antenna functionality, but am not really understanding what I'm seeing. I've added some images of diagnostic screens in case they are helpful. One thing that stands out is that the values for AP/BL/CP/CSC do not match - should they? I have tried to look into the CSC settings, but #*272[IMEI]# isn't enabled.
I'm a database developer by trade, so reasonably technically competent. But just have zero knowledge in this area. I'm a bit stumped as to what to try next. Any suggestions gratefully received.
Edit: Cant add links as I'm a noob. Settings are:
BL: G960FXXS9DTD7
AP: G960FXXS9DTD7
CP: G960FXXS9DTD7
CSC: G960FOXM9DTD7

I'm not sure it will work or not, maybe you can try to flash the phone firmware from this

B1nz said:
I'm not sure it will work or not, maybe you can try to flash the phone firmware from
Click to expand...
Click to collapse
Hi B1nz,
Thanks for the reply and apologies for my slow response. I'm reluctant to attempt this atm, as I don't want to risk buggering the phone and therefore giving the guy that repaired it an excuse to brush me off. If I could find a way to test the antenna functionality, that would be a big help. Are you aware of anything I can do to check that the antenna is / is not functional?
Thanks, Iain

eye_seven_four said:
Hi B1nz,
Thanks for the reply and apologies for my slow response. I'm reluctant to attempt this atm, as I don't want to risk buggering the phone and therefore giving the guy that repaired it an excuse to brush me off. If I could find a way to test the antenna functionality, that would be a big help. Are you aware of anything I can do to check that the antenna is / is not functional?
Thanks, Iain
Click to expand...
Click to collapse
You can just simply go to Settings -> About Phone -> SIM Status, or you can follow this article

B1nz said:
You can just simply go to Settings -> About Phone -> SIM Status, or you can follow
Click to expand...
Click to collapse
Having swapped the sim in, I get a brief flicker where it recognises that it's on the O2 network, with a signal strength of -87 dBm 33 asu. It the immediately loses the network and the signal strength changes to -113 dBm 0 asu.
Swapping the sim to my S7, I get a signal strength of -87 dBm 54 asu.
It's odd that I get that initial flicker of good signal then nothing. Is this an indication that the antenna isn't working properly? Something else?
Thanks for your help so far, I appreciate it.

eye_seven_four said:
Having swapped the sim in, I get a brief flicker where it recognises that it's on the O2 network, with a signal strength of -87 dBm 33 asu. It the immediately loses the network and the signal strength changes to -113 dBm 0 asu.
Swapping the sim to my S7, I get a signal strength of -87 dBm 54 asu.
It's odd that I get that initial flicker of good signal then nothing. Is this an indication that the antenna isn't working properly? Something else?
Thanks for your help so far, I appreciate it.
Click to expand...
Click to collapse
Not sure this is related. I personally changed my battery on my S9 last week. Was all prepared. Had all the tools. Still required heat gun etc to get rear glass off. Replaced battery. After a few days noticed I was only using wifi and not cellular data. My IMEI was there fine. But no data. Tried every trick in the book. Even odin Installed straight stock DT7. Everything worked but data. Then also to my horror, back to prenormal in download mode. I think battery removal reset all the rmm stuff. Followed the online stiff on how to change the date and turn off the windows time settings to auto update etc. Anyways, got back my OEM unlock tab too following the guides to fix RMM. Bottom line, I think the heat destroyed Internal antenna module. Ordered one online for 9 dollars. Should have it in two weeks....had to order it from the UK...lol. I am sure this is the issue since with Tmobile wifi calling, I never knew I had an issue till I noticed turning off my wifi killed all data. No APN issues, no sim issues, IMEI shows just fine. It's the antenna module. I see one bar for a second then a circle with a diagonal line. I'm 99% sure you have same issue.

Docmjldds said:
Not sure this is related. I personally changed my battery on my S9 last week. Was all prepared. Had all the tools. Still required heat gun etc to get rear glass off. Replaced battery. After a few days noticed I was only using wifi and not cellular data. My IMEI was there fine. But no data. Tried every trick in the book. Even odin Installed straight stock DT7. Everything worked but data. Then also to my horror, back to prenormal in download mode. I think battery removal reset all the rmm stuff. Followed the online stiff on how to change the date and turn off the windows time settings to auto update etc. Anyways, got back my OEM unlock tab too following the guides to fix RMM. Bottom line, I think the heat destroyed Internal antenna module. Ordered one online for 9 dollars. Should have it in two weeks....had to order it from the UK...lol. I am sure this is the issue since with Tmobile wifi calling, I never knew I had an issue till I noticed turning off my wifi killed all data. No APN issues, no sim issues, IMEI shows just fine. It's the antenna module. I see one bar for a second then a circle with a diagonal line. I'm 99% sure you have same issue.
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Click to collapse
That looks *very* similar, doesn't it? My initial suspicion was a damaged antenna module. But how would that explain it briefly picking up signal for me, or it picking up a signal for the repair guy that was adequate enough to make calls?

eye_seven_four said:
That looks *very* similar, doesn't it? My initial suspicion was a damaged antenna module. But how would that explain it briefly picking up signal for me, or it picking up a signal for the repair guy that was adequate enough to make calls?
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Briefly can be intermittent, broke weird....don't know. All I can say is I am 99.999999% of the belief the process can affect the internal antenna. My phone worked perfect until two days of use I noticed the issue. Will know when replacement part comes and I install. I left my battery glass cover off, so I can easily get to putting it in fairly easily. And I know all the formatting and reinstalling etc is a waste of time. Been there. Done that. Even have an alternate sim card here for another Tmobile account number I use. Sim cards work no issues on my Note 8 I am using now till I get the part. And again, all my IMEI stuff was there and APN's there. And I could make wifi calls on TMobile network no issues. Gotta be hardware, IMHO.

Docmjldds said:
Briefly can be intermittent, broke weird....don't know. All I can say is I am 99.999999% of the belief the process can affect the internal antenna. My phone worked perfect until two days of use I noticed the issue. Will know when replacement part comes and I install. I left my battery glass cover off, so I can easily get to putting it in fairly easily. And I know all the formatting and reinstalling etc is a waste of time. Been there. Done that. Even have an alternate sim card here for another Tmobile account number I use. Sim cards work no issues on my Note 8 I am using now till I get the part. And again, all my IMEI stuff was there and APN's there. And I could make wifi calls on TMobile network no issues. Gotta be hardware, IMHO.
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So I've spoken to the guy that did the repair, he's going to change the antenna module. Let's see what transpires... I'll update when it's done.

eye_seven_four said:
So I've spoken to the guy that did the repair, he's going to change the antenna module. Let's see what transpires... I'll update when it's done.
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Thanks....

Docmjldds said:
Thanks....
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I fixed MY issue. When replacing the battery, there's a blue wire that I inadvertently slightly pulled the end connector off the circuit board. It looked like it was connected, but it wasn't pushed all the way into it's connector. We are talking a connector that is approx 1mm or less in diameter. I just didn't see it was not properly pushed in. Connected it using a magnifier glass (I have old eyes). BEAUTIFUL cellular 4g/LTE signal. Just gotta clean it all up, and put back my rear glass. Bought a replacement glass setup with all the adhesives attached to come as close to waterproof as original.

Ok. So the antenna module has been replaced, using a part that I personally purchased. I was given the old part by the repairer, so I'm comfortable that he actually did it. This hasn't fixed the problem. Whilst I was there, he took out the sim from his own phone and put it into mine. Bam! Instantly picked up his network with a full strength 4g signal.
On getting home, I tried again with my wife's sim. It didn't work on LTE, but when dropped into 2G/3G only mode, it did look like it had a signal. But, I could not connect a call out in this mode.
I'm at a loss to understand what is going on here. Any ideas?
Edit: wife's sim is EE

Hi i just recently had this same issue after i took my s9 plus in for a screen replacement the technician used a donor phone for the screen and midframe,he basically just took the motherboard from my phone and put it into the other from there no network turns out if you dont take the origional daughter board aswell it will cause a mipi failure thus phone can't register on network,got my original daughter board back issue solved