I have a 7T running 10.0.12. I've had the phone for a few weeks now.
Twice I've had an issue where it displays No Sim, No Service. When it's in this state the wifi keeps turning on and off as well. GPS doesn't work either.
Both times it happened I was driving, playing spotify over bluetooth and running google maps for navigation. Music would quit, look at the phone and see the no service message. If you look at sim status while it's acting up, it alternates from service state "Radio Off" to "Out of service".
No amount of reboots, re-seating sim, trying another sim brings it back. Both times it recovered all on it's own while I was driving.
Some reading points to Magisk modules causing the issue, but I am not running any modules. Magisk is 20.4 and was installed by a tool from the forum here (link).
[EDIT]
I'm finding a lot of reports of folks having the same exact problem, but they all pertain to using a work profile. I am not using one.
Related
The following scenario has happened exactly four times by now:
I use two SIM cards, one in Estonia and another in Finland. I visit Finland every weekend or every other weekend, depending on scheduling. When I visit Finland then I use pre-paid SIM card that I load with credit in order to use unlimited mobile internet the same way I use at home.
When I visit Finland I swap by Estonian SIM card to Finnish one and when I return I swap it back.
Problem is that exactly after six SIM card swaps, Google Cloud to Device Messaging service stops working and Galaxy Nexus blue connection bars stay permanently gray. This means that push notifications will not work and gTalk cannot connect at all. Other Google services - including Market/Play - work well if they can function without C2DM.
After such an event I have to restore my device to factory settings each and every time. After I do this, the device starts working again. So far I have not found a way to get C2DMA working without having to factory reset my device. The device has no developer or other rogue apps installed that might affect this in any way.
Clearing data of Android Messaging Service and other background Android services has not helped. Rebooting has not helped. Changing from data to WiFi, or to Airplane mode and back, has not worked.
My best guess is that this is some security or whatnot validation in Android code. Before Android 4.0, whenever you changed your SIM card (which I did just as frequently on my HTC Desire), it asked for your Google Account password, after which C2DM worked.
But ever since Android 4.0, your password is not asked and the C2DM stops working after exactly six SIM swaps. I know that it is exactly after SIM swaps by checking my schedule and gTalk chat logs, where I have made notes of this.
I have reported this bug and looked for a solution for this before, but have not gotten an answer. Has anyone run into such an issue or knows what I could try to restore C2DM connection without having to reset my device again? I know that the problem is very custom and thus most users never face this issue, since swapping SIM cards this often is rare.
Wow, this is insane. I actually worked it out! I had reset my phone THREE TIMES in the past handful months because of this!
Apparently what happens that there's a bug in Android that switches SIM card setting after multiple SIM card swaps. Android stores SIM card related settings internally somewhere, but apparently has a bug in restoring those settings after certain amount of SIM swaps.
I went to Mobile Networks menu and from there to Access Point Names and for some reason Android had switched to WAP service instead of the mobile internet one. This is a setting I had never changed and it's happened four times by now.
If you run into the same problem or your C2DM suddenly appears, then you should look at those settings first and foremost.
Hi,
Just asking if GPS is working without SIM card because I recently buy one and the seller remove the SIM; without SIM I tried to use Application>navigation and nothing hapened. The phone still searching for location indefinitly....I google it and can't figure out what's up. Some says only some application will work, other says it can't work without SIM. Please, help me here.
leonardusius said:
Hi,
Just asking if GPS is working without SIM card.
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It certannly worked for weeks in my Lg Optimus G pro phone , when i had not placed any sim card into the phone at all. It was one thing i was hoping would work completly without "web" also , so far it seems to do that fine also . Agps is not a requirement for the GPS, in this phone as far as i can tell, although AGPS can be got over the WiFi if needed, like the app GpsStatus would do that, and other apps out there.
With that said, it should be noted that in my system, the phone connects to the tower AnyFreakingWays. as the US model of phones is capable of making a 911 call (or even butt dialing one without any sim card in place.
So much of my GPS testing also included working with the Airplane mode on, and the tower fully disconnected. And it still worked. Indoors not as well, but at least it works indoors eventually, some other crappy gpses (i used) would not ever fix indooors.
In the "location" settings, I just turn off the Web locator stuff, and leave on only the real GPS, I really do not know much about how the other location methods works on the phone, because I keep turning that off.
Thank you.
https://www.reddit.com/r/GooglePixel/comments/5b6twj/pixel_xl_intermittent_cell_and_gps_signal/
https://www.reddit.com/r/GooglePixel/comments/5bhltm/issue_with_dropping_lte_service_randomly/
Hello all,
I am currently attempting to troubleshoot/corroborate apparent issues with the mobile radio. My first device took six or seven attempts to activate, and then intermittently threw a no SIM error with what looks like a radio restart (no signal on any bands, cycle between No Service/Searching 4-5 times before reconnect.)
WiFi appears to be good, I'm only experiencing these drops while connected to LTE with no graceful fallback to 3g or even 1x. Drops are happening while stationary and in motion, frequently in areas where my signal is at least decent. The threads linked above both have users who appear to be having the same problem. Particularly strange is that there dose seem to be a location component, there are two spots in particular that seem to be more likely to cause the problem (though not every time.)
I've replaced the device once already in an attempt to resolve this, and while I initially thought that the issue was resolved, I did manage to catch another drop yesterday after running tests forcing the device in to 3g-only operation (the device performed just fine before, during, and for a few minutes directly after these tests.) Of note, I haven't managed to catch a 'No SIM' message on this replacement phone. I have been running an app to notify me of signal loss today, and of course it seems to be behaving now.
If you've experienced any similar issues, please reply and let me know if you've had luck resolving.
Yep this is what is happening allright.
I have two htc one M7s. My main phones.
Last evening, in a very strange shift from her norm, my woman asked to use MY phone to cruise the net.
Ok so she goes on and fifteen minutes later I get the phone back.
Suddenly, in the middle of refreshing a twitter or facebook, THE WI FI CONNECTION GOES DOWN.
I cant get the thing to reset after shutting it off. I have to go to the ROUTER , turn it off then on.
Five minutes later after ROUTER reboot, it is working again.
It is just the beginning of our story. I have a second phone also same make and model. It is midnight now, some four hours later, and as usual I turn off router before sleep.
I wake up, unplug other phone (not the one from last night) and, swap out the sim card to it (was in phone durring Wi Fi problem).
Now, I switch on the phone, and it comes up with LTE cuz Im on mobile. Then I get the normal "ok" from phone message (system communicating with mobile).
Heres where it gets strange. I get the 3G on top bar. Ok this NEVER happens.
One minute later it says LTE again.
Wtf is happening.
Not mentioning in this story little invisible forces kicked my left leg open as I was waking up. Angry *****es over Hillary.
Same LTE issue here. Just contacted Google Support and rebooted to safe mode. Let see if I have the same problem again tomorrow
chadwick359 said:
https://www.reddit.com/r/GooglePixel/comments/5b6twj/pixel_xl_intermittent_cell_and_gps_signal/
https://www.reddit.com/r/GooglePixel/comments/5bhltm/issue_with_dropping_lte_service_randomly/
Hello all,
I am currently attempting to troubleshoot/corroborate apparent issues with the mobile radio. My first device took six or seven attempts to activate, and then intermittently threw a no SIM error with what looks like a radio restart (no signal on any bands, cycle between No Service/Searching 4-5 times before reconnect.)
WiFi appears to be good, I'm only experiencing these drops while connected to LTE with no graceful fallback to 3g or even 1x. Drops are happening while stationary and in motion, frequently in areas where my signal is at least decent. The threads linked above both have users who appear to be having the same problem. Particularly strange is that there dose seem to be a location component, there are two spots in particular that seem to be more likely to cause the problem (though not every time.)
I've replaced the device once already in an attempt to resolve this, and while I initially thought that the issue was resolved, I did manage to catch another drop yesterday after running tests forcing the device in to 3g-only operation (the device performed just fine before, during, and for a few minutes directly after these tests.) Of note, I haven't managed to catch a 'No SIM' message on this replacement phone. I have been running an app to notify me of signal loss today, and of course it seems to be behaving now.
If you've experienced any similar issues, please reply and let me know if you've had luck resolving.
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I've got a Black 32GB XL on Verizon (Verizon Model) and never have this problem. Any tips on reproducing it? I'd love to help test and see what I can come up with. Only time my phone says no-sim is for like 5ish seconds after boot. And I've only once seen the phone fall to 3g in an area with known strong LTE. My previous note 7 fell off LTE pretty often. Specially when jumping between towers. But my PXL rarely (Once) does.
This has been happening to me on my pixel xl 128gb since the day I got it. I reported it to Verizon and to google. Google said bad sim. Verizon replaced my sim and it didn't change a thing. I can usually get it to reconnect if I toggle cellular data on and off. Please let me know if anyone finds a solution.
This is known as hollow bar. And it happens to certain Nougat phones in certain areas.
Recently purchased a new, unlocked S8+ and got a new SIM from Verizon. This was approximately 2 weeks ago. Zero problems up until this week. I have been on 4 flights this week - before each flight, the phone works great. When I land on the other end, Verizon LTE pops right up, varying numbers of bars as one would expect depending on arrival airport, just like it would normally when I have service and can do everything. However, nothing. No texts, no calling, no data. Tried toggling various things, resetting, nothing for a hour after that, all the while I've got 3-4-5 bars and I can see the data arrows lighting up like there is upload/download transfer.
Finally, I tried "reset network settings" as a last resort and immediately my phone works like a charm. It has happened another 3 times since - every time I have flown, with the exact same results.
All domestic flights. While I'm not a guru, I'm not a complete halfwit either - this is my 4th galaxy and it's definitely not something I'm doing or have ever had problems with before. I fly all the time and never a problem like this until this week. Checked APN, it's right. Checked software update - have most recent.
Any ideas? I'm desperate. Have searched literally everything I can think of and no one else seems to be reporting this problem, not to mention it's difficult to describe in a Google search. About at my wit's end having to re-enter wifi and passwords every day, relearn Bluetooth devices. Theres no other way to truly reset the mobile data settings and get my phone to work that I've discovered. Please, please help.
Eject SD card and remove sim, wait a min, reinsert cards. While the phone is on. Should reset just ur sim settings. Maybe
I apologize in advance for the long read.
I recently activated Verizon service on a Note 4 that has been sitting unused since the Note 8 came out. The Note 4 is in perfect physical condition, with no scratches on the screen or body, and has been in a protective case since new. I did replace the battery in it prior to activation, as I expect for the life to have been deteriorated.
I did a factory reset and inserted my Verizon SIM card, and it worked perfectly. I installed my everyday apps and a few games on the phone, and I used it without any issue for about a week. During that time, it did install a couple of OTA updates, but I expected that since it had been "off service" for a few years.
After that first week, I put the SIM card back in my NOTE 8 for a couple of days, after which I went back to the Note 4. Initially, 4G data and cell service worked, but within the same day I started having service drops. If I was on the phone and a call dropped, it would show an error message saying "No SIM / SIM Error".
Her is what I have attempted so far:
First, I replaced the SIM with a new one. There was difference in the frequency of the random service drop.
When that did nothing, I assumed that one of the OTA updates from the prior week had done something to modem / radio. The phone was on 6.0.1 at that time. I unlocked the bootloader and installed TWRP, and first tried downgrading to stock 5.1.1, then to a "modified 5.1.1, then to CM 13, and now Lineage 15 (frequently factory reset / cache wipe. There has not been an improvement (or reduction) to the random service drop.
Yesterday, I happened to be on My Verizon online, and I had a message showing that Verizon no long had the information on my phone (IMEI), and requesting that I open a Chat Window to update my info. At this point, the Note 4 is still running the Lineage 15.1. The Verizon team member asked me for the IMEI, and when I looked under the settings, it said "None" under IMEI. In a quick search, I found a forum on Lineage 15.1 that said turning of the screen lock and rebooting the phone will reload the SIM and IMEI info. That worked, and I was able to view the IMEI and verify connection. I explained my issue with the Verizon support, and she said everything appeared to be good on her end. Over the course of 15 minutes, we tested my connection and it worked. About 30 minutes after that, it dropped service again.
Finally, here is where it is at now:
I start with no service. If I do nothing but restart the phone, it will show LTE service for 2 or 3 seconds, then nothing. If I remove and reinstall the SIM, I will get the same 2 or 3 seconds, then nothing. If I turn Airplane Mode on and off, that does not reconnect the service. If I change the lock screen security to "None" and restart the phone, there is no service, but if I set Screen Lock to "Swipe" and restart the phone, I will have LTE service for at least 30 - 45 minutes before it drops, sometimes a few hours. When it does drop, it does not come back on it's own. The only way I have found to get it back it to "Screen Lock - None, reboot, Screen Lock - swipe, reboot".
Will replacing the modem fix the problem? Is there a specific modem that I need to match up to the ROM? Thanks!
bife2003 said:
I apologize in advance for the long read.
I recently activated Verizon service on a Note 4 that has been sitting unused since the Note 8 came out. The Note 4 is in perfect physical condition, with no scratches on the screen or body, and has been in a protective case since new. I did replace the battery in it prior to activation, as I expect for the life to have been deteriorated.
I did a factory reset and inserted my Verizon SIM card, and it worked perfectly. I installed my everyday apps and a few games on the phone, and I used it without any issue for about a week. During that time, it did install a couple of OTA updates, but I expected that since it had been "off service" for a few years.
After that first week, I put the SIM card back in my NOTE 8 for a couple of days, after which I went back to the Note 4. Initially, 4G data and cell service worked, but within the same day I started having service drops. If I was on the phone and a call dropped, it would show an error message saying "No SIM / SIM Error".
Her is what I have attempted so far:
First, I replaced the SIM with a new one. There was difference in the frequency of the random service drop.
When that did nothing, I assumed that one of the OTA updates from the prior week had done something to modem / radio. The phone was on 6.0.1 at that time. I unlocked the bootloader and installed TWRP, and first tried downgrading to stock 5.1.1, then to a "modified 5.1.1, then to CM 13, and now Lineage 15 (frequently factory reset / cache wipe. There has not been an improvement (or reduction) to the random service drop.
Yesterday, I happened to be on My Verizon online, and I had a message showing that Verizon no long had the information on my phone (IMEI), and requesting that I open a Chat Window to update my info. At this point, the Note 4 is still running the Lineage 15.1. The Verizon team member asked me for the IMEI, and when I looked under the settings, it said "None" under IMEI. In a quick search, I found a forum on Lineage 15.1 that said turning of the screen lock and rebooting the phone will reload the SIM and IMEI info. That worked, and I was able to view the IMEI and verify connection. I explained my issue with the Verizon support, and she said everything appeared to be good on her end. Over the course of 15 minutes, we tested my connection and it worked. About 30 minutes after that, it dropped service again.
Finally, here is where it is at now:
I start with no service. If I do nothing but restart the phone, it will show LTE service for 2 or 3 seconds, then nothing. If I remove and reinstall the SIM, I will get the same 2 or 3 seconds, then nothing. If I turn Airplane Mode on and off, that does not reconnect the service. If I change the lock screen security to "None" and restart the phone, there is no service, but if I set Screen Lock to "Swipe" and restart the phone, I will have LTE service for at least 30 - 45 minutes before it drops, sometimes a few hours. When it does drop, it does not come back on it's own. The only way I have found to get it back it to "Screen Lock - None, reboot, Screen Lock - swipe, reboot".
Will replacing the modem fix the problem? Is there a specific modem that I need to match up to the ROM? Thanks!
Click to expand...
Click to collapse
I think you might be dealing with 2 separate issues. I'm kind of guessing about the first issue but the second is a common problem.
I think the original problem is that your sim card is not making a good contact in the sim slot. You could try putting a think piece of cardboard or something that will press the sim card to the sim slot contacts (maybe check to make sure that there isn't any dirt on the contacts but from the sound of it I'm guessing your phone is pretty clean).
The second problem is that all of the aosp roms have varying degrees of signal loss that occurs. Some people have a lot and some not as much, but everyone is affected in some way with what people have been referring to as "sim death".
My suggestion would be to run a stock or modified stock rom until you get your sim problem straightened out and then if you still want to switch to an aosp rom then at least you'll know that any further problems are just the normal sim death that occurs from time to time with those types of roms.
If you've already updated your bootloader to a 6.0.1 version you can flash the modified stock rom that I put together. I haven't had any signal/sim issues at all with that and no reports of it. Like I mentioned before though, the only caveat is that it needs to be on a bootloader that is at least CPD1 or newer. If it's not then your wifi won't work.
Rom link If you're interested.
kevintm78 said:
I think you might be dealing with 2 separate issues. I'm kind of guessing about the first issue but the second is a common problem.
I think the original problem is that your sim card is not making a good contact in the sim slot. You could try putting a think piece of cardboard or something that will press the sim card to the sim slot contacts (maybe check to make sure that there isn't any dirt on the contacts but from the sound of it I'm guessing your phone is pretty clean).
The second problem is that all of the aosp roms have varying degrees of signal loss that occurs. Some people have a lot and some not as much, but everyone is affected in some way with what people have been referring to as "sim death".
My suggestion would be to run a stock or modified stock rom until you get your sim problem straightened out and then if you still want to switch to an aosp rom then at least you'll know that any further problems are just the normal sim death that occurs from time to time with those types of roms.
If you've already updated your bootloader to a 6.0.1 version you can flash the modified stock rom that I put together. I haven't had any signal/sim issues at all with that and no reports of it. Like I mentioned before though, the only caveat is that it needs to be on a bootloader that is at least CPD1 or newer. If it's not then your wifi won't work.
Rom link If you're interested.
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Click to collapse
Thank you for the reply. I think that you may be onto something with both issues. After posting this question today, I did examine the SIM slot, and although all of the pins looked good, and no dust or debris was visible, the metal guide over the SIM did feel slightly loose from the card. I did put in a thin shim, and the significantly improved the time that the phone stays connected. If that was a true issue, along with the possibility of the ROM causing a separate cause, I am absolutely interested on going back to a stock (or modified stock) ROM. The only reason that I did what I did was an attempt to fix the connectivity issue.
Thanks for your help. I will give your ROM a try and let you know how it works.