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Phone Reboots during active Phone call, and NFC questions

My phone has reboot a few times since ive purchased it, on active phone calls, twice today alone. I have a feeling its a software compatibility issue with one of my apps, but i just wanted to see if other people have experienced this, and any advice before i try a factory reset.
My phone is not rooted. It has the latest OTA update. When i first booted phone, it did a google backup
My other question was on the NFC. When i have NFC checked in the wireless area, it works great. But as soon as i turn it off, and try to turn it back on, it gives an error code. It wont turn back on until i reboot the phone, and than it checks just fine again until i turn it back off. I played with a phone at BB and it gave an occasional error when i cycled the check mark fast, but it always corrected the error eventually. This is probably another software bug, but just seeing if anybody else is experiencing this.
If i reset my phone, i will lose all my save game data correct?

My Nexus S is also resetting during phone calls, four times in a row now.
Is there any news on this issue?

http://forum.xda-developers.com/showthread.php?t=880497

I just reported rebooting issue to the Google. Please add your comments and star it, so Google will be aware of the problem and start fixing it!
http://code.google.com/p/android/issues/detail?id=13674

I exchanged the phone, and it was great for a week or so, but just tonight reboot twice during an active calls. I suspect it to be some sort of software bug, but, I'm most likely going to be exchanging it again. Works great until you need to use the phone as a phone, than it doesnt work.

Psosmith82 said:
My other question was on the NFC. When i have NFC checked in the wireless area, it works great. But as soon as i turn it off, and try to turn it back on, it gives an error code. It wont turn back on until i reboot the phone, and than it checks just fine again until i turn it back off. I played with a phone at BB and it gave an occasional error when i cycled the check mark fast, but it always corrected the error eventually. This is probably another software bug, but just seeing if anybody else is experiencing this.
Click to expand...
Click to collapse
I can recreate this problem as well, and was a major concern for me (didn't want to have a defective NFC down the line when/if it becomes common use). After speaking with some people over at Android Central, one of the editors had this to say:
"Yes, if I toggle the NFC switch enough times I will see the error notification. It still works as intended though. Looks like there is a "cool down" time on the NFC hardware, and messages to the kernel are getting picked up as errors. Either the filter needs tweaked (the filter that reports kernel messages) or the output from the NFC hardware needs "re-worded"
Makes sense to me. I wouldn't worry too much about it. However, I did create a report to bring to Google's attention, if you feel like starring it: http://code.google.com/p/android/issues/detail?id=13581

Weird Network/Airplane Mode Issue

A couple of times now, when I'm out and about I lose my cellular data connection. It just stops working. In the past on other devices when this has happened a reboot will usually fix it. But on my Atrix 2, when I reboot the phone comes one with Airplane Mode enabled (please note that I did not turn on Airplane mode). If I try to turn Airplane Mode off, it will just sit and say "Enabling wireless connections" but never actually turn them on. I have to actually do a battery pull to fix this problem. The first time it happened I went and got a new SIM card (as mine was pretty old), and it just happened to me again this afternoon. I'm past my 30 day return policy (bought the phone at Best Buy) so I can't return it.
Has anyone else experienced this problem? Anyone have any ideas on what might be causing this?
Just to reiterate, I did not turn on Airplane Mode, the phone powers on with it enabled and then won't actually turn off Airplane Mode when I tell it to.

i have the same problem too. After it happens couple times, i find out it might be the problem from the at&t address book issue which cause the phone cant read the sim for some reason (as it result, airplane mode keep enable). I also believe it is because the phone has been unlocked so the at&t address book crash. Is your phone unlocked?
Well, i am not quite sure it work on ur phone, but here is how i do it usually.
Way 1- plugin another sim card(sometimes i dun even need to do it), load the at&t address book, it will force the phone to load sim card cause of the contact from sim (then it should work right after that or after reboot)
Way 2- pull the battery for 1 day, it will work after that(but this is kinda dumb)
Hope this can help you XD.

athris said:
i have the same problem too. After it happens couple times, i find out it might be the problem from the at&t address book issue which cause the phone cant read the sim for some reason (as it result, airplane mode keep enable). I also believe it is because the phone has been unlocked so the at&t address book crash. Is your phone unlocked?
Well, i am not quite sure it work on ur phone, but here is how i do it usually.
Way 1- plugin another sim card(sometimes i dun even need to do it), load the at&t address book, it will force the phone to load sim card cause of the contact from sim (then it should work right after that or after reboot)
Way 2- pull the battery for 1 day, it will work after that(but this is kinda dumb)
Hope this can help you XD.
Click to expand...
Click to collapse
My phone is not unlocked. I could see the AT&T Address book thing contributing, I've NEVER had that thing work right, and thus I don't even have it set up on my phone (it's on there in my Accounts, but it's not configured that I know of because i do my contact syncing through Google).
Battery pull definitely solves the problem, at least temporarily. The only other SIM I have is the old one they took out when they replaced the SIM after this happened the first time. I also don't store any contacts on my sim (again use google for that), so I don't know if doing a SIM swap would solve the problem in a more permanent way since I've basically already done that.

I tried battery pull, but it doesn't work sometimes. The reason i run at&t address book because it would force the phone to detect the sim again(cause of the contact). Lucky it doesn't always happen. hoping Motorola can fix this issue on next update.
**I just think about it, it might be some stupid mistake from motorola that overwrite the memory about the phone status section.

have you guys tried factory resetting it?

I tried to reset but it doesn't help at all
Sent from my MB865 using XDA App

how about freezing or removing the apps from att?

athris said:
I tried battery pull, but it doesn't work sometimes. The reason i run at&t address book because it would force the phone to detect the sim again(cause of the contact). Lucky it doesn't always happen. hoping Motorola can fix this issue on next update.
**I just think about it, it might be some stupid mistake from motorola that overwrite the memory about the phone status section.
Click to expand...
Click to collapse
hmmm i guess this would help.. https://supportforums.motorola.com/message/506301
look for the number 6 post.

pilboyz said:
hmmm i guess this would help.. https://supportforums.motorola.com/message/506301
look for the number 6 post.
Click to expand...
Click to collapse
Hmm, I did this just yesterday, I'll give it a week or so and see if the issue happens again after setting my contact storage to my Google account.

mkoby said:
Hmm, I did this just yesterday, I'll give it a week or so and see if the issue happens again after setting my contact storage to my Google account.
Click to expand...
Click to collapse
ok just inform us what happens.

I have and identical problem.
My phone would turn with the Airplane mode ON and I can't deactivate it, or even if it shows I can, it's not in the menu and I won't get any signal.
I can't recall If it happened because of a change but I doubt so.
I tried factory reset / cache / dalvik, also flashing numerous rom from neutrino to cm7 to cm9 and even MIUI (which worked the first time I flashed it for a day and then same error).
And It will also occasionnaly reboot If I try too hard checking for networks and such.
Any help ?

No service [SM-920I]

I can't get a signal on my phone. It keeps showing the "emergency calls only" message. When I try to call someone, it shows an error message: "network not registered".
Weird thing is, it was working flawlessly a few hours ago. I didn't mod it, nothing is different. I just charged it and rebooted.
I tried toggling airplane mode on/off, factory reseting, and it didn't fix my problem. My IMEI shows up correctly on settings, and the phone is being used in the same region I bought it.
OBS: If I put the sim card on another phone, it works. When i put it back on the s6, it keeps working until i reboot it, and after that it doesnt register on the carrier network anymore.
Anyone can help me with this?

No one?
I've exhausted all my known options! I can't keep a phone that can't even be turned off. If the phone freezes, that means I'll not have a signal until i can find another phone to put my sim on, and then back again on mine...
I'd really appreciate some help, since support where I live is crappy and chances are that i'll have to take the loss on the defective phone if I can't fix it.

Went to the carrier, tried other sims, even other carriers sims. Still nothing.

You can't get warranty from who you bought it from or else samsung? it sounds like a defect somewhere, if you are lucky it could just be the simcard tray but else it is something inside the phone

Wifi / Bluetooth / Sim Card Issues Since Last Two OTA Updates

I received an OTA Update in early to mid May. I am now forgetting which version I received at that time. ( I forget as I have done so many downgrades/upgrades/factory resets in my troubleshooting the last month!) Up until these issues, I've never rooted or flashed a ROM, or unlocked boot loader or anything. My N5 had always been completely stock.
First Issue
It all started with just the sim card. I get "no sim card" message, even though it was in there. This was my original SIM card and I had never ejected it since I bought it new. I found I could turn it off, pop it out and back in, and boot it again. Sometimes it will see the sim card again. It may take 20 times, but finally work.
I naturally got a new sim card, as well as confirmed said sim cards worked in other phones. My wifi and bluetooth were working fine at first. Working with google support, they recommended a factory reset to fix the sim card issue. Immediately after the factory reset, my bluetooth would no longer turn on nor show a MAC address. At this point, my wifi was fine.
Second Issue
In addition to the sim card slot issue, now my Bluetooth no longer works! Around this time, I received another OTA update, this time it was 5.1.1 LMY48B. I had hoped it would fix the issues, but no dice! I start reading up on the XDA forums as I am determined to start rolling back to see if this will fix anything. I unlocked the boot loaded, rooted, etc following the threads on XDA
Third Issue
I do all sorts of flashing to hammerhead-krt16m_4.4 to hammerhead-ktu84p_4.4.4 to hammerhead-lrx21o_5.0 to hammerhead-lmy48b_5.1.1 . On the final flash back to 5.1.1 my wifi now no longer works!!!!!!!!!!! It is stuck at wifi turning on and no MAC address shows. It also seems my cell data is very very slow now!
After many calls to google, I think I finally succeeded in getting a “ticket routed up”. My phone is from the play store around 10/31/2013. They keep pushing I am out of warranty. I attempt to ask for a refurb N5 without luck so far. I am not very confident anything will come from google. This being my only handset now, it is just not an option to send this to LG. My current state is my voice/txt and cell data are working. Data seems a little slow but usable. Wifi and bluetooth won't turn on. I also still have the sim car slot issue upon rebooting. After a bunch of reboots it will eventually see sim card.
What else can I try? Is there a better way to attempt to repair/reload my radio drivers? Perhaps there is corruption of sorts? I have not tried a custom ROM or radio or kernel…… I did take to a local tech. They looked at everything literally under a microscope and did not see any issues that way. I am in the USA and have a lgd820. Although we are quick to assume a hardware issue, I am wondering if there is some sort of incompatibility with the first run of N5 and lollipop….. who knows!
I’ve read all sorts of threads on the internet. It seems I am not the only one. We are very quick to assume it must be a bad motherboard, it just seems too coincidental to me!
Here is a collection of threads……
Within the N5 Sub
http://www.reddit.com/r/Nexus5/comments/2g0i3m/no_wifi_or_bluetooth/
http://www.reddit.com/r/Nexus5/comments/253y8d/my_nexus_wont_activate_wifi_and_bluetooth/
http://www.reddit.com/r/Nexus5/comments/2pur0v/wifi_stuck_on_turning_on_mac_and_ip_addresses/
http://www.reddit.com/r/Nexus5/comments/361ecw/help_wifi_and_bluetooth_stopped_working/
http://www.reddit.com/r/Nexus5/comments/2h4co7/wifi_wont_turn_on/
http://www.reddit.com/r/Nexus5/comments/2hpj2w/can_no_longer_connect_to_wifi_stuck_at_wifi/
http://www.reddit.com/r/Nexus5/comments/2wjk38/wifibluetooth_issues/
http://www.reddit.com/r/Nexus5/comments/2zboet/no_wifi_no_bluetooth_and_reboots_whenever_i_press/
Other Links
http://forum.xda-developers.com/google-nexus-5/help/wifi-stuck-t2721643
http://forum.xda-developers.com/google-nexus-5/help/bluetooth-t2733672
https://productforums.google.com/forum/#!topic/nexus/IJSOuc7gw0w;context-place=forum/nexus
https://productforums.google.com/fo...otification#!category-topic/nexus/1H6ZiIMYrtw
https://productforums.google.com/forum/#!topic/nexus/ke-OEPLbRSQ
https://productforums.google.com/fo...xus/lollipop|sort:relevance/nexus/NbO-AGvRCLk
http://code.google.com/p/android/issues/detail?id=80028
I found this, but not really sure it’s the same thing….. http://forum.xda-developers.com/showpost.php?p=52441901&postcount=47

Prodeje79 said:
I found this, but not really sure it’s the same thing….. http://forum.xda-developers.com/showpost.php?p=52441901&postcount=47
Click to expand...
Click to collapse
Hi,
This link was actually what i was going to suggest. It seems you've tried pretty much everything in the book except that.
I think its worth a try. Same as any other learning process, take your time and read the whole thing once or twice until you feel comfortable with the process. Then go for it.

Darn it, I should have downloaded those programs BEFORE rooting my phone again. Now I a struggloing to get my SIM card detected again to get data to DL them! whooops!
How would I go about attempting to read my files first to see if they are accessible and potentially write down my old MACs first?
EDIT: I found this but not sure how to get that working? I have Windows 7 and CMD prompt at this point. what program is that using?
https://www.reddit.com/r/Nexus5/comments/2j6vao/how_to_changefix_your_wifi_mac_address/
beekay201 said:
Hi,
This link was actually what i was going to suggest. It seems you've tried pretty much everything in the book except that.
I think its worth a try. Same as any other learning process, take your time and read the whole thing once or twice until you feel comfortable with the process. Then go for it.
Click to expand...
Click to collapse

OK, I went through those steps. everything appeared to go through correctly. Still no wifi nor bluetooth
EDIT: I rebooted a second time. WHen it first boot up, wifi was on and connected to my works AP. I quickly went in and snagged a screen shot of MAC address. Oddly enough, it did not match what I had input via hex editor. Within a few moments the wifi stopped working. It is back to the turning wifi on issue..... bluetooth still not working as well.
Very interesting.....
EDIT2: I get access denied when attempting to read either files within their corresponding folders under persist.
I was able to copy my stock files into my sdcard download folder and read them there without issue. Thus seeing my default addresses for both!
Perhaps it is normal, but I am never able to edit the old or new files under persist. I basically renamed original folders to bluetoothold and wifiold. I could delete them perhaps.
Note that I put my phone into airplane mode before doing anything noted in the steps.

Any other ideas? Given that it is showing my original MAC address the one time it worked, this makes me think that it is not reading the files .macaddr at all

I have the same problem. Funny thing is, the phone is just over 2 years old and the motherboard was replaced just 9 months ago (so, brand new one).
In my case, I received and Android update 2 days before I found the phone burning hot and restarting on it's own. Then the same chain of events you describe started to unleash. Now I can't be sure if this is software related, hardware related or both.
Can't seem to find a solution to the issue either.

Prodeje79 said:
I received an OTA Update in early to mid May. I am now forgetting which version I received at that time. ( I forget as I have done so many downgrades/upgrades/factory resets in my troubleshooting the last month!) Up until these issues, I've never rooted or flashed a ROM, or unlocked boot loader or anything. My N5 had always been completely stock.
First Issue
It all started with just the sim card. I get "no sim card" message, even though it was in there. This was my original SIM card and I had never ejected it since I bought it new. I found I could turn it off, pop it out and back in, and boot it again. Sometimes it will see the sim card again. It may take 20 times, but finally work.
I naturally got a new sim card, as well as confirmed said sim cards worked in other phones. My wifi and bluetooth were working fine at first. Working with google support, they recommended a factory reset to fix the sim card issue. Immediately after the factory reset, my bluetooth would no longer turn on nor show a MAC address. At this point, my wifi was fine.
Second Issue
In addition to the sim card slot issue, now my Bluetooth no longer works! Around this time, I received another OTA update, this time it was 5.1.1 LMY48B. I had hoped it would fix the issues, but no dice! I start reading up on the XDA forums as I am determined to start rolling back to see if this will fix anything. I unlocked the boot loaded, rooted, etc following the threads on XDA
Third Issue
I do all sorts of flashing to hammerhead-krt16m_4.4 to hammerhead-ktu84p_4.4.4 to hammerhead-lrx21o_5.0 to hammerhead-lmy48b_5.1.1 . On the final flash back to 5.1.1 my wifi now no longer works!!!!!!!!!!! It is stuck at wifi turning on and no MAC address shows. It also seems my cell data is very very slow now!
After many calls to google, I think I finally succeeded in getting a “ticket routed up”. My phone is from the play store around 10/31/2013. They keep pushing I am out of warranty. I attempt to ask for a refurb N5 without luck so far. I am not very confident anything will come from google. This being my only handset now, it is just not an option to send this to LG. My current state is my voice/txt and cell data are working. Data seems a little slow but usable. Wifi and bluetooth won't turn on. I also still have the sim car slot issue upon rebooting. After a bunch of reboots it will eventually see sim card.
What else can I try? Is there a better way to attempt to repair/reload my radio drivers? Perhaps there is corruption of sorts? I have not tried a custom ROM or radio or kernel…… I did take to a local tech. They looked at everything literally under a microscope and did not see any issues that way. I am in the USA and have a lgd820. Although we are quick to assume a hardware issue, I am wondering if there is some sort of incompatibility with the first run of N5 and lollipop….. who knows!
I’ve read all sorts of threads on the internet. It seems I am not the only one. We are very quick to assume it must be a bad motherboard, it just seems too coincidental to me!
Here is a collection of threads……
Within the N5 Sub
http://www.reddit.com/r/Nexus5/comments/2g0i3m/no_wifi_or_bluetooth/
http://www.reddit.com/r/Nexus5/comments/253y8d/my_nexus_wont_activate_wifi_and_bluetooth/
http://www.reddit.com/r/Nexus5/comments/2pur0v/wifi_stuck_on_turning_on_mac_and_ip_addresses/
http://www.reddit.com/r/Nexus5/comments/361ecw/help_wifi_and_bluetooth_stopped_working/
http://www.reddit.com/r/Nexus5/comments/2h4co7/wifi_wont_turn_on/
http://www.reddit.com/r/Nexus5/comments/2hpj2w/can_no_longer_connect_to_wifi_stuck_at_wifi/
http://www.reddit.com/r/Nexus5/comments/2wjk38/wifibluetooth_issues/
http://www.reddit.com/r/Nexus5/comments/2zboet/no_wifi_no_bluetooth_and_reboots_whenever_i_press/
Other Links
http://forum.xda-developers.com/google-nexus-5/help/wifi-stuck-t2721643
http://forum.xda-developers.com/google-nexus-5/help/bluetooth-t2733672
https://productforums.google.com/forum/#!topic/nexus/IJSOuc7gw0w;context-place=forum/nexus
https://productforums.google.com/fo...otification#!category-topic/nexus/1H6ZiIMYrtw
https://productforums.google.com/forum/#!topic/nexus/ke-OEPLbRSQ
https://productforums.google.com/fo...xus/lollipop|sort:relevance/nexus/NbO-AGvRCLk
http://code.google.com/p/android/issues/detail?id=80028
I found this, but not really sure it’s the same thing….. http://forum.xda-developers.com/showpost.php?p=52441901&postcount=47
Click to expand...
Click to collapse
+1
I'm facing the same issues and I tried all the possible steps I could find on internet trying to repair the problem.
Actually, since the latest updates I was encountering some issues with the WiFi only: not turning on either off and not showing properly the MAC addres. So I decided to factory reset, even SDcard and since yesterday I have tried all the possibile guide I found to internet to fix the MAC address not showing and the WiFi not turning on/off but nothing worked. I tried even to flash again the old factory images, such as KitKat, Lollipop, etc., to lock the bootloader again and to dismantle the phone in order to clean the motherboard, but nothing worked. Phone still gives me MAC address 02:00:00:00:00:00 alternatively with the correct one, I can't figure out on what it depends because sometime it seems to work: it shows the correct MAC, it connects to wifi network; suddenly it doesn't!
I'm really going crazy to understand what's wrong.

You'll have to dig up my final posts on this , but in a nutshell, send into LG for repair, select cheapest option they offer. Receive mint phone. My cost was $45 and about one month... I picked up a cheap $20 phone to get me by.
In other news.... I now have a 6p!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Renton91 said:
+1
I'm facing the same issues and I tried all the possible steps I could find on internet trying to repair the problem.
Actually, since the latest updates I was encountering some issues with the WiFi only: not turning on either off and not showing properly the MAC addres. So I decided to factory reset, even SDcard and since yesterday I have tried all the possibile guide I found to internet to fix the MAC address not showing and the WiFi not turning on/off but nothing worked. I tried even to flash again the old factory images, such as KitKat, Lollipop, etc., to lock the bootloader again and to dismantle the phone in order to clean the motherboard, but nothing worked. Phone still gives me MAC address 02:00:00:00:00:00 alternatively with the correct one, I can't figure out on what it depends because sometime it seems to work: it shows the correct MAC, it connects to wifi network; suddenly it doesn't!
I'm really going crazy to understand what's wrong.
Click to expand...
Click to collapse

Nexus 5 SIM not recognised

People,
I hesitate to ask the question again, but I promise you that I've read everything on the subject that I can find (including many of the 171 pages of the "Nexus 5 Flashable Modems and EFS Backup" thread...) and also on a lot of other sites.
My son's N5 on 5.1.1 ran out of battery a month ago (it worked perfectly for the 15 months that I had used it) and when he recharged it he'd lost mobile data. He had the mobile service triangle in the notification bar, but empty. No service.
I have tried absolutely every suggestion that I've read. Airplane mode on/off. Flashed 3 older radios. Installed older Lollipop & Kitkat 4.4.4 from Google Nexus factory image site. Installed the latest nightly of Cyanogenmod. Installed MPZ79M. Rooted it. Nothing works.
I don't believe it's a hardware problem - when I remove and replace the SIM the notification goes from the square with a diagonal bar across it ("no SIM") to the empty triangle. But as soon as I reboot (not just screen off & waken, but full restart) the triangle is replaced with the "No SIM" square again. The same reaction happens on the initialisation after a factory reset - at the "Register SIM" screen it says "No SIM", but extracting and replacing the SIM starts the "Attempting to connect to service" sceen, though this just does nothing until my patience runs out and I skip it. The SIM itself has 3 scratches along it, so all in all I don't think it's a contact problem, but something in the software. The SIM works fine in the Nexus 4 that I've given him.
EFS - I don't know enough about it still, but the phone displays the correct IMEI, so I'm hoping that this means that the EFS is not corrupted?
I know that this is a well-known problem, but on the off-chance that somebody has read a solution that I haven't found...
Thanks for your patience and any help you can offer.

Oh well...
...I guess I have a £350 paperweight?
I suppose at least I can use it as an entertainment console, since wifi seems to be ok. But a terrible shame to waste such a beautiful device.

Maybe you already tried it... Just to be sure:
a) You have incorrect APN configuration, to solve this try resetting your APNs via Settings > Wireless & networks > More > Mobile networks > Access Point Names and then click in three dots above and select "Reset to default".
b) Your mobile phone antenna unit is not working properly, solving this is pretty easy, shutdown your phone, remove your phone's back panel very carefully (using a plastic material..i did it using guitar pick) and then you'll see two wires adjacent to edges of your phone, just remove and refix them gently and reboot your device.
c) Reboot in safe mode and try to play with the preferred network type.
d) I had this problem "No service and no signal network in nexus 5" after restarting phone.
I tried to restart phone few times again and reinsert sim card. No luck.
Then I took sim card out while phone was on ( I forgot to turn it off) and reinsert it and now it's working fine.
It must be a contact problem. Just not shure how long will it work.

Primokorn said:
Maybe you already tried it... Just to be sure:/QUOTE]
Thanks, Primokorn, I'll give your suggestions a go - appreciate the ideas.
I have tried the APN settings, but since there's no SIM (huh!) it's greyed out, though it's temporarily updateable if I extract/replace the SIM while the phone's on - but it's grey again on the next reboot.
Click to expand...
Click to collapse

Primokorn,
No luck. I tried all of these with no result at all. It looks as if this is a very serious flaw in the Nexus 5 - I had my doubts, to be honest, when my son said it started after the phone ran out of battery, but I see exactly the same explanation from other people in the huge number of threads reporting this no-radio problem. How can Google issue such a good phone with such a lousy bug in it...? No point in even asking them (though I've seen at least one person who tried with an impressivly helpful response from the Google support person) since not only is the phone out of warranty but it has been rooted.
Oh well, I enjoyed it while I had it...