[Q] Cellular modem and NFC unstable - Xperia Z3 Q&A, Help & Troubleshooting

Hi,
I hope someone could help me save a useless phone.
I got a Z3 from ebay (it's O2 Germany). As soon as I turned it on it updated to 5.0.2.
Then later I inserted the SIM card (took me some time to get the nano from the carrier).
It's not SIM locked.
The problem is that I can't get a steady signal. AT ALL. It hits a signal for 2 sec, then nothing.
It can recognize my carrier in the split second that it's on, I got the access points and all. I can even search for carriers and get a list of several to choose from.
The same phenomena is apparently happening with the NFC - the software switch turns on then straight off (same radio chip issue?)
I have tried GSM only, WCDMA only, LTE.
Tried changing the bands used using the internal *#*# menus.
Using flashtool I have flashed a stock global rom instead of the german. And local stock.
I have read that some people had this issue after the lollipop update so I rolled back to stock 4.4.4, same issues with cellular and NFC.
I'm really at a lost. I have this fancy brick that I was hoping to give my dad (he needs the screen size, the old fool) and instead I'm wasting valuable time at work trying to fix it...
Anyone?
Thanks,
Juv.

J_McBurst said:
Hi,
I hope someone could help me save a useless phone.
I got a Z3 from ebay (it's O2 Germany). As soon as I turned it on it updated to 5.0.2.
Then later I inserted the SIM card (took me some time to get the nano from the carrier).
It's not SIM locked.
The problem is that I can't get a steady signal. AT ALL. It hits a signal for 2 sec, then nothing.
It can recognize my carrier in the split second that it's on, I got the access points and all. I can even search for carriers and get a list of several to choose from.
The same phenomena is apparently happening with the NFC - the software switch turns on then straight off (same radio chip issue?)
I have tried GSM only, WCDMA only, LTE.
Tried changing the bands used using the internal *#*# menus.
Using flashtool I have flashed a stock global rom instead of the german. And local stock.
I have read that some people had this issue after the lollipop update so I rolled back to stock 4.4.4, same issues with cellular and NFC.
I'm really at a lost. I have this fancy brick that I was hoping to give my dad (he needs the screen size, the old fool) and instead I'm wasting valuable time at work trying to fix it...
Anyone?
Thanks,
Juv.
Click to expand...
Click to collapse
I got the exact same problem, im in Norway and using mye Operator firmware..

I'm having the NFC problem. I have the US T-Mobile version (D6616), and NFC stopped working right after I updated to Lollipop.
Factory reset, and repairing using Sony's PC Companion does not help. On first boot, i'll get a "NFC firmware update failed (-1)".

Related

Radios for other networks?

I have a different thread in this forum where I was asking slightly different questions... I found some new info and the old title isnt as appropriate anymore so heres the new stuff...
The situation is this. I have a I727R which is the Rogers Galaxy S2 LTE. I am trying to get it on a different network (same frequencies, etc... in fact same towers in many cases). The network I am trying to get onto is MTS.
Previously it seemed the phone was not capable of getting any type of signal as I would never ever see any carriers when I searched for available networks under the "Network Operators" section. However since getting back to the city I can now see one carrier listed as "302660" which according to this site: http://rebelsimcard.com/listed-adde...and-mobile-country-code-mcc.html#.UBbxurSe6So is the mobile network/country code of MTS. Even with my MTS SIM in the phone it wont use this network and on other phones the network actually shows up as MTS and not 302660.
It seems that there is something that I need to do with the Radio to get it working. Not sure if this one is locked in some fashion or what. Has anyone experienced this? Any suggestions?
WoodroweBones said:
I have a different thread in this forum where I was asking slightly different questions... I found some new info and the old title isnt as appropriate anymore so heres the new stuff...
The situation is this. I have a I727R which is the Rogers Galaxy S2 LTE. I am trying to get it on a different network (same frequencies, etc... in fact same towers in many cases). The network I am trying to get onto is MTS.
Previously it seemed the phone was not capable of getting any type of signal as I would never ever see any carriers when I searched for available networks under the "Network Operators" section. However since getting back to the city I can now see one carrier listed as "302660" which according to this site: http://rebelsimcard.com/listed-adde...and-mobile-country-code-mcc.html#.UBbxurSe6So is the mobile network/country code of MTS. Even with my MTS SIM in the phone it wont use this network and on other phones the network actually shows up as MTS and not 302660.
It seems that there is something that I need to do with the Radio to get it working. Not sure if this one is locked in some fashion or what. Has anyone experienced this? Any suggestions?
Click to expand...
Click to collapse
did you try *#2263# or still nothing happens when u enter the service code, my thinking is u have to force it to use a frequency that mts is on even though its the same as rogers, and you are sure its unlocked
edit: almost positive thats the problem, i was mucking around w/that menu and picked something accidently and i lost my connection
Yeah that menu works if I flash to stock with either GB or ICS but doesnt work in CM9
I have tried all of them. This phone is just stubborn. In another development I actually used ODIN to go back to Stock GB and the phone was just screwed up. So now I'm trying to wipe it completely clean (Wipe Data/Factory Reset x 5, Format System x 5, Format basically anything I could x 5 , Wipe Cache, Wipe Dalvik, etc.) then flash to one of the stock images.
I'm also redownloading them both and going to compare the MD5's on them to see if they match or if I had a bad download.
I'm not sure if there is another way to completely wipe the phone clean (as in I dont care/want any data on it...). I see the repartition option but see many warnings about using it
Compared MD5's and they matched on both downloads (different PC, different internet connection) but this time the flash back to stock GB worked (no FCs). However the network still shows up as 302660 instead of "MTS". Using *#2263# I tried leaving it on Automatic, setting it to WCDMA 850 (my GNex is set to WCDMA Preferred), GSM 850, WCDMA ALL and GSM ALL but it always shows up the same and wont let me join (under GSM it doesnt show up at all actually). I didnt touch the LTE menu item because nobody around here has rolled out their LTE network yet
The oddness of these issues actually makes me suspect there are bad "sectors" on the internal memory or something... is there anything to check it?
EDIT: Just another update... using my AT&T SIM in my GNex I can put it on WCDMA Preferred and then search network operators. I get 3 different networks to come up (302220 302610 and CAN Rogers Wireless). If I click on CAN Rogers Wireless the phone gets signal and registers on the network.
If I do the same in the S2 LTE I only see the 302660 network still and cant register on it. The others dont show up at all (not even the Rogers one which is odd to say the least)
Its looking like there is some wierd hardware issue on this phone that I just cant figure out
the only way to solve this is to do further testing
try skyics 4.2f6, he has all the radios there, try each one and see what happens, when switching different radios flash them twice, the service code 2263 works with this rom
SKY-ICS 4.2F6-2.4
Ok I've typed this post like 8 times and it keeps telling me my post cant be submitted... arrgghhh... here goes again (losing detail as I continue to try)
I've tried your suggestion above with basically the same results. I have made a few more obervations though...
- My MTS SIM doesnt always read and it seems ROM dependent. There are times when I've had it reading the SIM without issue on a ROM then i flash to another ROM and it wont read no matter what I do. However the AT&T SIM reads on every single ROM (still no signal). If i have the patience to continue playing with this phone I might try and narrow down which ROMs will read the card and which wont (then reflash and see if thats still the case)
- With SkyICS when I dont have any SIM inserted (which is the same as having my MTS SIM inserted since it never sees it ) the phone shows signal! Oddly enough it shows this signal on the LTE band of which no providers in my area have an LTE network (tested by setting the bands using *#2263#). MTS is supposedly getting one later this year/early next year so maybe I'm seeing some sort of test network?
- It almost seems to me like its not actually unlocked (even though we purchased the SIM Unlock code from cellunlocker.net). Not sure how to test it or how to try putting it in again seeing as it never pops up and asks since we unlocked it. How does it know its unlocked once its been done? I mean if I go back to stock through ODIN should it be locked again? My brother replaced 2 pieces of hardware after unlocking it (the SIM reader and the USB port) so not sure if that would have anything to do with it.
At this point I'm almost writing it off as busted. My friend on Rogers is away but thats the last thing I'd like to try is using a Rogers SIM
The only way to tell if its unlocked is in stock with a sim from another carrier, so if its a rogers phone dont use a rogers sim, when the phone boots it will ask u for the unlock code if its locked, if its unlocked it will just boot into android. Once its unlocked it stays unlocked forever, unless you change the memory chip, wherever that chip is i dont know
Posted w/xda app w/ i727R
MY STICKIES
| ROMS | KERNELS | FIRMWARE | RADIOS | HOWTO'S | GUIDES | INFo |
NEWB GUIDES TO: RESTORE TO STOCK | USE ODIN | INSTALL CWM | ROOT |
Yeah its unlocked then I guess. I only have non-Rogers SIM cards and its never prompted me since. Think I'll just trash it... maybe I can convince my brother to get a GNex since I know they work
Thanks so much for all the suggestions. Your patience and investment in this is very much appreciated!
Vincom what ICS radios from rogers work on at&t without problems(and RAT unlocked) ?
mahanddeem said:
Vincom what ICS radios from rogers work on at&t without problems(and RAT unlocked) ?
Click to expand...
Click to collapse
im using rogers ics radio xlf3, seems all radios work with rogers or att.
i got some news for u, my problem was when i was in toronto i wasnt getting lte, i went to mobile settings and seen it was set to gsm/hspa, so i picked gsm/hspa/lte/ , but would not stick.
so i went into 2263 menu and picked lte, then "all" then left haptic button and hit "end", then i got lte.
when i got home there is no lte so i wasnt getting a signal, data or voice, and i could not pick an operator as none would be visible, nada.
so i did the 2263 menu and chose automatic then hit left haptic button and choosed "end", then bam got connected to rogers.
for mts its either gsm or wdcma in the 850mhz range, or pick all, you will have to test or try this procedure.
or try this is from seans old skyics instructions to get data working so it should work for voice but i edited for your needs, try w/out sim or with sim to see what happens, mine worked w/sim installed:
power off phone and remove sim card
then reboot phone (no sim card)
and when up go to phone and dial *#2263#
Select ? Settings(for u pick what mts has, maybe auto or wdcma and pick 850Mhz or all bands, this is where you will have to test)
then bottom left haptic button hit end
Open dialer again.
Dial *#2263#
select automatic
Right bottom feedback button/end
power down
now place sim back in phone
reboot
im almost sure your problem lies in the band frequency for mts, you just have to set it properly
edit: when you get into the 2263 menu see which item has an asterik next to it, thats the one currently set to
edit: it seems like the second item, wcdma, is the hspa band, which is mts's band, or try automatic

Z3 Dual D6633 SIM compatibility / issues

Hi, I've got a Z3 dual D6633 which I want to use with an EE SIM in the UK. I've tried a cut down microsim and been into the EE shop and tried one of their nano SIMs but both don't work correctly in the phone.
The cut down SIM makes a service phone.android.com or something like that continually crash and doesn't connect to the network.
The one I tried in the shop just doesn't connect to the network.
This is on 23.0.F.1.74 and .82 I noticed in the release notes for .82a fix for Yoga SIMs in Russia but don't know what the problem there was, but wonder if it is linked. All other UK Sims work including 3, Lyca, giffgaff, Vodafone, virgin just not EE. has anyone got an EE one working or had similar problems?
I did notice that an app/widget I use called phono to show network info and signal strength usually shows the IMEI when no SIM inserted or the MSISDN, however with the non-working EE SIM it just shows 00000 - not sure which field it is getting wrong. Oh and yes the SIMs work fine in all other phones I've tried.
I do need to try more tests on factory reset and removing phono etc but so far it looks to be a firmware incompatibility with EE Sims.
OK, so I did a few more tests and got hold of another nano SIM on EE.
So it looks like the 23.0.F.1.74 firmware does not like EE SIMs and the phone application constantly crashes. On the later .82 firmware it works fine. I was mislead a bit by going into an EE store and trying a SIM - they must have given me an un-provisioned SIM to try. I stupidly assumed they would have actually given me a SIM that worked, doh!
I'm experiencing something similar here. I have the D6633, bought in UK, now I am in Brazil and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normal. But internet only over wi-fi.
I called my operator, they say the phone is configured correctly, I tried my brother's sim card from another operator and the same happens.
So, the phone is clearly unlocked, if not it wouldn't recognize the sim cards at all. But no connection to the internet...
Any suggestions? I already did four factory resets, I recovered the Rom using sony software...
Same issue
adrenalize_ said:
OK, so I did a few more tests and got hold of another nano SIM on EE.
So it looks like the 23.0.F.1.74 firmware does not like EE SIMs and the phone application constantly crashes. On the later .82 firmware it works fine. I was mislead a bit by going into an EE store and trying a SIM - they must have given me an un-provisioned SIM to try. I stupidly assumed they would have actually given me a SIM that worked, doh!
Click to expand...
Click to collapse
Hello, I have the exact same problem. How did you get the firmware .82/for what country? Is everything working well with it? Really appreciate your guidance.
I had the same problem with the EE sim card, ended up sending the phone back.
fabiooli said:
I'm experiencing something similar here. I have the D6633, bought in UK, now I am in Brazil and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normal. But internet only over wi-fi.
I called my operator, they say the phone is configured correctly, I tried my brother's sim card from another operator and the same happens.
So, the phone is clearly unlocked, if not it wouldn't recognize the sim cards at all. But no connection to the internet...
Any suggestions? I already did four factory resets, I recovered the Rom using sony software...
Click to expand...
Click to collapse
Just a thought, but is it definitely a 6633 and not some other variant which perhaps doesn't work in your country/network?
pconcha said:
Hello, I have the exact same problem. How did you get the firmware .82/for what country? Is everything working well with it? Really appreciate your guidance.
Click to expand...
Click to collapse
I purchased my D6633 from Saudi Arabia and the 23.0.F.1.82 update came as an OTA notification about a week ago.
If you look in this thread http://forum.xda-developers.com/z3/general/d6633-z3-dual-updated-to-23-0-f-1-82-t2929352/ it mentions that someone thinks the update has only been released for Saudi and Brazil - I assume it is for Europe as well as one of the release notes says a problem with Russian Yota SIMs has been fixed. I think there are also links to the firmware in there although I've not looked that hard as I got the OTA. I guess it might still in my memory - anyone know where Sony stick their OTAs?
Seems to work fine so far - no noticeable difference - well other than EE SIMs now work!
jadaress1 said:
I had the same problem with the EE sim card, ended up sending the phone back.
Click to expand...
Click to collapse
Ah, shame as it looks like the update might have fixed it. I was thinking I might have to go to another handset too (The Samsung G900FD is OK if you can put up with touchwiz and other Samsung "features"!!)
fabiooli said:
I'm experiencing something similar here. I have the D6633, bought in UK, now I am in Brazil and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normal. But internet only over wi-fi.
I called my operator, they say the phone is configured correctly, I tried my brother's sim card from another operator and the same happens.
So, the phone is clearly unlocked, if not it wouldn't recognize the sim cards at all. But no connection to the internet...
Any suggestions? I already did four factory resets, I recovered the Rom using sony software...
Click to expand...
Click to collapse
Hmmm, sounds like another issue as with mine the EE SIM caused the phone.apk to constantly crash/restart.
Did the data work OK in the UK?
As you can make calls/SMS I assume you are at least on a 2G network which should still give you (very slooow) data - It does sound more like an APN issue - or something else. I know you said you checked with your operator what their APN settings should be (just my experience with operator customer support lines) - but I would try and have a look yourself - and maybe list your APN settings and operator and someone may spot something.
I have seen a couple of phones / operators where the "APN type" in the APN settings needs specific settings - its down the bottom and often isn't mentioned when people get the settings. For example in my current settings I have "default,hipri,dun,supl" for Virgin mobile in the UK.
You may want to search XDA/Google or start your own thread which might get more reads/replies
adrenalize_ said:
You may want to search XDA/Google or start your own thread which might get more reads/replies
Click to expand...
Click to collapse
...or try some of the things which have already been suggested and post your findings !
adrenalize_ said:
Hmmm, sounds like another issue as with mine the EE SIM caused the phone.apk to constantly crash/restart.
Did the data work OK in the UK?
As you can make calls/SMS I assume you are at least on a 2G network which should still give you (very slooow) data - It does sound more like an APN issue - or something else. I know you said you checked with your operator what their APN settings should be (just my experience with operator customer support lines) - but I would try and have a look yourself - and maybe list your APN settings and operator and someone may spot something.
I have seen a couple of phones / operators where the "APN type" in the APN settings needs specific settings - its down the bottom and often isn't mentioned when people get the settings. For example in my current settings I have "default,hipri,dun,supl" for Virgin mobile in the UK.
You may want to search XDA/Google or start your own thread which might get more reads/replies
Click to expand...
Click to collapse
It was working fine there. Here It apparently could not download APN settings, so I installed an APN APP and now it works fine!!!
---------- Post added at 12:36 PM ---------- Previous post was at 12:30 PM ----------
poldie said:
Just a thought, but is it definitely a 6633 and not some other variant which perhaps doesn't work in your country/network?
Click to expand...
Click to collapse
Working great now!!!! I used an APN APP form PlayStore
adrenalize_ said:
I purchased my D6633 from Saudi Arabia and the 23.0.F.1.82 update came as an OTA notification about a week ago.
If you look in this thread http://forum.xda-developers.com/z3/general/d6633-z3-dual-updated-to-23-0-f-1-82-t2929352/ it mentions that someone thinks the update has only been released for Saudi and Brazil - I assume it is for Europe as well as one of the release notes says a problem with Russian Yota SIMs has been fixed. I think there are also links to the firmware in there although I've not looked that hard as I got the OTA. I guess it might still in my memory - anyone know where Sony stick their OTAs?
Seems to work fine so far - no noticeable difference - well other than EE SIMs now work!
Click to expand...
Click to collapse
I see. Mine is the d6633 but it is customized for HK. I have not received the OTA upgrade yet. I have checked xperifirm as they may have it but will wait for the OTA upgrade. Sony must be releasing soon.
Thank you for replying! I am using Vodafone in the meantime, but want to go back to my EE plan!
about dual sim connectivity
can anyone tell me which sim card slot support 2G, 3G and 4G or LTE
I heard that 1 slot support only 3G and 4G
and other one is support 2G & 3G so kindly confirm me what is actual.
thanks
arfan.chatha said:
can anyone tell me which sim card slot support 2G, 3G and 4G or LTE
I heard that 1 slot support only 3G and 4G
and other one is support 2G & 3G so kindly confirm me what is actual.
thanks
Click to expand...
Click to collapse
For mine, on my networks here in Australia, I can assign 4G LTE to any sim, however, that makes the other sim 2G only (GSM).
The other option is to have both at 3G (WCDMA/HSPA).
If you assign 4g to sim one that work only for 4g or like other phones "LTE(preference)/WCDMA/GSM"
4g not available automatically search 3G if 3G not available automatically search 2G?
Assume second sim is on 2g
arfan.chatha said:
If you assign 4g to sim one that work only for 4g or like other phones "LTE(preference)/WCDMA/GSM"
4g not available automatically search 3G if 3G not available automatically search 2G?
Assume second sim is on 2g
Click to expand...
Click to collapse
Yes, your 4G sim slot will fall back onto 3G and 2G as per expected for most handsets.
help needed
sephstyler said:
For mine, on my networks here in Australia, I can assign 4G LTE to any sim, however, that makes the other sim 2G only (GSM).
The other option is to have both at 3G (WCDMA/HSPA).
Click to expand...
Click to collapse
I just got a 6633 through kogan and i am having real trouble getting it to connect to optus network with iinet and truphone simcards. Does anyone know if i need to update any settings or firmware from factory to make it compatible. I can see iinet and truphone lte networks (which i assume is the optus 4g network) when searching manually but the phone wont connect. Sims work in a mates iphone6 without a problem.
Don't suppose anyone knows how to get rid of the #sim card icon on the statusbar?
adrenalize_ said:
I purchased my D6633 from Saudi Arabia and the 23.0.F.1.82 update came as an OTA notification about a week ago.
If you look in this thread http://forum.xda-developers.com/z3/general/d6633-z3-dual-updated-to-23-0-f-1-82-t2929352/ it mentions that someone thinks the update has only been released for Saudi and Brazil - I assume it is for Europe as well as one of the release notes says a problem with Russian Yota SIMs has been fixed. I think there are also links to the firmware in there although I've not looked that hard as I got the OTA. I guess it might still in my memory - anyone know where Sony stick their OTAs?
Seems to work fine so far - no noticeable difference - well other than EE SIMs now work!
Click to expand...
Click to collapse
Have you managed to root it? I rooted the 23.0.1.f.0.96 firmware for my Z3 D6633, but after a while (half a day) it starts to reboot frequently, and Google Play stops working (can browse apps, but not download them, as the download bar never progresses).
Also, my EE sim seems to work, but the phone still shows it as 'Sim 1 0000000' whereas other sims simply appear as sim 1 and sim 2.
I am wondering if I should just downgrade back to 23.0.F.1.74 and move from EE to Vodafone or 3...
Ah, work forced a BlackBerry (yuck!) on me and I've since sold the D6633.

[Q] Google Nexus 5 - No Mobile Network Issue

Hello,
I am from India. I had purchased a Google Nexus 5 phone (Black/ 32GB) last year (December 20th, 2013)
I have started facing a serious issue since yesterday. My entire mobile network went down all of a sudden. Tried using other SIM but of no use. The same SIM works fine in other phone. Other functions including WiFi in Phone works perfectly fine.
A couple of things that I noticed are:
1) When I try to search for the Network manually, I get the message "Error while searching for Network".
2) I noticed that the PREFERRED NETWORK TYPE is defaulted to LTE. I cannot select any other option 2G or 3G.
3) When used Choose Automatically option - it starts with Automatic Registration and then flashes an error "Can't connect to this network right now try again later"
I tried doing a Factory reset hoping that it would work. But, no success. Have contacted LG Direct Service Center (since I bought it from retailer and not from GooglePlay store) and they suggested it's a PCB problem and it needs to replaced which would cost me around 12K INR. Which I am not ready for.
Please let me know what needs to be done. Any help is highly appreciated.
Regards,
Vijay
Turn off airplane mode
dicecuber said:
Turn off airplane mode
Click to expand...
Click to collapse
He's clearly not in airplane mode.
I have tried with all basic troubleshooting options, kindly check the attached screenshots. Please please help needed urgently.
I was going to make a new thread, but his problem matches mine almost exactly.
Hi guys, i have this problem for over a week now.. A very frustrating week i must say. I got this n5 about a month ago, my uncle got himself a G3 and gave his nexus to me.
Everything was smooth, amazed by the phone, everything working fine, happy as hell. It all crumbled when I went to spend the holidays at my brothers, where he lives my carrier doesn't work (everyone uses another one). When i got back to my house where the mobile network works fine it just stopped. All other sims would work on my phone and my sim work on other phones.
I gave it a time, thought it would be cause i spent too much time on my brothers and it would be ok after a while. It didn't. Then i started to worry and try to fix it somehow. First i got a new simcard (same carrier), no bueno. They told me to restore my phone and stuff, it didn't work. The phone has always that empty triangle, doesn't matter if it's 3G, 4G or 2G.
So I came to the internet look for help. I saw that some people had bring this to the LG, their response was to do a recovery with fastboot and then put 2G on the mobile network. For a moment i thought it was over, my phone finally had some bars !! But to my disgrace I can't make nor receive calls, i can only send/receive SMS and access internet thru 4G, not 2G as the support said. Oh, if i put 3G or 2G dem bars go missing and the empty triangle ****er appears again. Still, my simcard works on every other phone but now only one carrier works on my phone (not mine unfortunately).
Then I started looking on forums like this one and a whole bunch of others and tried many things, all of them unsuccessful.
I tried many things, maybe forgot some but will list those that i remember.
I tried to flash the factory rom. Then tried to flash only the radio of previous androids (tried too many of them to count). Dialed that *#*#4636*#*# or smth, put LTE/GSM, only LTE, activated/deactivated radio. Airplane mode on/off. Tried to recovery on fastboot again. Tried to make new APN. To finish my story, put a Cyanogemod rom and it also didn't work.
So now i decided to post here as my last shot before i go to that carrier that still works. Also, what guarantees that this carrier won't stop working like the others? I'm afraid that may happen. Further informations, i saw many people complaining about T-Mobile and other carries, but I'm brazilian, so it's not one of these. My carrier is Oi and the one that still works is TIM.
The two threads i got most tips were these and some sites in portuguese:
http://forums.androidcentral.com/google-nexus-5/357547-nexus-5-cell-signal-problem-s-fix.html
http://forum.xda-developers.com/google-nexus-5/help/bug-make-receive-calls-wifi-enabled-t2839814
Thank y'all in advance and sorry if my english make it hard or impossible to understand.
My fingers are crossed!

CDMA radio problem. Please Help. I've used search

Hello, I'm having a major problem with my phone and I'd be extremely grateful for any help or expertise.
PROBLEM:
I cannot get any kind of CDMA signal on TWO Verizon HTC M8 (I didn't post in that specific thread for a reason, I'll explain, please don't move it).
--------------------------------------------------------
HOW THIS HAPPENED:
The first phone, I was using as normal and it was fully functional.. One night i flashed a ROM and ended up falling asleep before if built the ART cache (so it was just playing the bootanimation) and the next morning I awoke to find the boot animation still running. The phone wasn't hot but ever since then I could never get any kind of CDMA service (so i can't use my carrier.)
The second one i just bought and put my sim in and BAM. Same problem.
--------------------------------------------------------
MORE DETAILS ON THE PROBLEM:
If i put my sim in, i can usually get 4G data but can NEVER get any lower bands. CDMA settings are greyed out in settings. This persists across ROMs and radio firmwares. My immediate thought was to get a new sim but my sim works absolutely fine in my LG G2. The sim is cut from a microsim but the point there is it worked fine before (and still works in my G2) and it didn't shift in the tray. I tried my friend's sim from an Iphone 5s and it did the same thing. I've tried everything i possibly know to do. This problem has basically cost me $400 dollars or 2 M8s.
Even if i go into the phone info hiddenmenu, i cannot select the CDMA or EvDo bands by themselves.

Can't call anymore since the motherboard swap

Hallo everyone,
What's up: my Nexus 5 can't make any type of calls.
The story behind: in march the memory chip of my Nexus 5 died, so I let it repair from the official LG support (it was still under guarantee). They changed the whole Motherboard and send me it back. At the same time, I received the new SIM card from my mobile network operator (o2 Germany) because I moved from prepaid to contract, but I still keeped my number.
Since the first day with the repaired Nexus and the new SIM, the LTE worked without problem and I could surf, but I couldn't make a single call. I talkd with the o2 Germany support, and they toldt me that It could have been a problem related to the number porting. After a few weeks the porting was officially completed, but I couldn't still make any call. Then after many weeks and many support calls, I had a so simple Idea...just let's test my o2 SIM on my old Smartphone (an HTC Desire)...and finally I could make a call! So I'm sure that the problem doen't lies on the operator or the SIM.
What's happen exactly with the Nexus 5 and the o2 SIM (here the Video): the LTE Network is full available, I call a number and appears "Dialing" (sometimes the screen turns black without any reason until I press the power button, but not this time), after seconds of absolute no sounds it shows the error "Cellular network not available". Of course I tried to call different numbers, but the problem persist and it still remains, even if I use another SIM from another operator.
I'm really concerned that maybe the problem lies on the Nexus 5 hardware, maybe the antenna, after a bad repair...but that's just what I suppose.
I'm looking forward for your opinions and support, thanks a lot!
Have you taken any steps to troubleshoot?
Seems the issue is the N5, as the SIM is working, but it is unclear where the problem lies. Have you checked the APNs, do they match the ones on HTC device? Maybe try reflashing factory image? Factory reset?
You said LTE is working, so it is not antenna, I think it is a software issue. Start by checking APN.
Thanks for your answer, I will consider the antenna as functional
I have been checking the APN Settings with the same o2 SIM on the two different devices (Nexus 5 and HTC Desire), they are identical, but the Nexus 5 got some extra settings.
As usual, with the Nexus 5 I can't call, but if I move the SIM on the HTC Desire it does. Just using the same dafault APN configuration. Those are the suggested configuration on the official o2 Website, but I would just stick with the default ones that already works (on Desire).
Any suggestion?
I would do a factory reset just a last choice, because I got tons of apps and data that needs time to be reinstalled.
Another info: the LTE Network on the Nexus 5 sometimes disappears, and then appears again.
Bump, any Idea about this problem and how I could fix it?
Hallo, I'm asking again for your support :angel:
those last weeks I couldn't get rid of the problem with the calls, and I'm still clueless about how I can fix it. At the end of the month the 2 years guarantee expires, so I need to hurry up.
Summary: SMS sometimes comes later als expected, sometimes LTE Data doen't work, most of the times I can't make calls.
What I have already done:
- already moved my main SIM (o2 Network) from my Nexus 5 on an old device, and there I have no problems at all, and I can make all the calls that I want.
- already checked the APNs, they are all on defaults settings and are ok.
- already tryed to use a fully functional SIM from another network operator (TIM Italy) on my Nexus 5, even if the Network is fully available I can't make any single call.
At this point, I'm pretty sure, that the o2 SIM and the o2 Network itself works fine.
Today I have done a factory reset after a full backup on my Nexus 5. With all default an no extra app there's no improvement at all, call function works only a few times, most of the times I got the Network but the call function doesn't work properly... here just a frash Video about it:
https://drive.google.com/file/d/0B0yEcZCOozgkdmdjZWs0bkdIUnc/view?usp=sharing
After this try the LTE Network has disappeard (here a Foto) coming back only later as EDGE Network.
Could be maybe that after the Nexus 5 repair in march, the Device was assembled incorrectly and the Antenna have an unsteady contact?
Isn't the IMEI stored on the motherboard? If so, its possible you got a motherboard with a blacklisted IMEI.
username8611 said:
Isn't the IMEI stored on the motherboard? If so, its possible you got a motherboard with a blacklisted IMEI.
Click to expand...
Click to collapse
I don't think that the officially LG Support (that replaced my Nexus 5 Motherboard im march) would use Motherboards with blacklisted IMEIs. Even if my motherboard had a blacklisted IMEI, then I shouln't be able to make any single call, but that's not what happens, because I can still and receive calls sometimes.
Well then I think you already know the answer. The warranty repair wasn't successful. You've eliminated everything else except the phone, and it used to work before, correct?
username8611 said:
Well then I think you already know the answer. The warranty repair wasn't successful. You've eliminated everything else except the phone, and it used to work before, correct?
Click to expand...
Click to collapse
Yes, sadly seems that the problem lies on the unseccessful repair. Could you reformulate your last sentence/question? I didn't understand what you you mean
Is your phone switching to 3G while calling ? Because afaik, 4G can't be used to call someone.
So I suggest you to force your phone to stay in 3G and try making a call.
When I try to make a call with the LTE (4G, with full coverage showed), the call doesn't succeed (look at the last Video that I posted) and just after this the Network disappears and shows "Mobile Network Not Available" (but this doensn't happen always), then a few second later the LTE is available again.
When I move from LTE to 3G there's no Network available, and the call just doens't work. Same with 2G.
Update: I received back from the LG repairing my Nexus 5. In order to fix the problem with the calls, the entire motherboard was swapped. I didn't received more detailed informations about this fix, but right now it works again greatly.

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