My phone shuts down randomly, along with frequent network fluctutations. But when i remove the simcard the phone works fine. I recently flashed the .283 (4.4.4) US version while i am from India. Can it be the reason for this weird behavior? Do different ftf files have different basebands even for same model (c6502) ?
Also can anyone give me the indian baseband flashable by flashtool?
BLUF: Turn of Stamina mode (or whatever super battery saver program your phone has) and uncheck or disable Android Device Manager under Device Administrators.
Try turning off your stamina mode or what ever super battery saving program your phone has. I had the same problem. There is some sort of conflict with US SIMs. While a SIM is sending data (IE not while connected to wifi) and while the phone is sleeping, the SIM (i believe SIM Tool Kit) get stupid confused and tries to wake the phone and then just reboots. This is just a theory. What I do know is that I had random reboot problems when I switched from my European SIM to an American SIM. Same phone, the only change was the SIM. After several days, I found out that it only occurred when idling, with STAMINA mode activated, not connected to Wifi. I was able to constantly recreate the problem to confirm the conflict. It worked for me, I hope it works for you.
similar problem here
I am also facing similar problem. But this is now related to SIM at all.
My symptoms are -
1) Network signal drops and disconnects
2) Phone is not able to send/receive data, especially 2G data
3) Phone reboots randomly. This happens right after there are data send/receive issues
4) Lately, phone is not able to reboot at all. Sometimes SONY appears and phone goes off. Sometimes this happens after XPERIA, sometimes after boot is complete phone goes off.
I am not sure why this is happening. This started happening after gsam battery monitor was installed. I uninstalled that, but problem is not solved. And frequency of this seems to be increasing day by day.
I am trying repair in PC companion now, but not sure if this is useful.
Phone details - Xperia ZL, C6502, 4.4.4 build 10.5.1.A.0.283, 13 months old, India
Anybody else having similar issue? Any solutions?
Never buy sony again
Finally, my phone died.
Symptoms were not exactly like battery issue mentioned by others. But at the end this seems like battery issue only.
Phone works ok when connected to charger. Once you remove, it dies within 5 minutes.
Went to sony service center, they almost refused to repair it. Asking me to either buy refurbished one or buy another SONY with discount.
This is insane and utterly irresponsible.
They should be able to repair any phone released in last 2 years at minimum. They are saying that they cannot repair this specific model! I dont know how true this is.
This is extremely disappointing, I would never buy SONY product again. And would also appeal fellow members to do the same.
This phone lasted only for 14months. Warranty is only for 12 months, so my bad luck.
This battery issue is clearly a design flaw. Whats more shocking is that they are not ready to do anything to it, even when I am ready to pay for it. I am feeling like going to consumer court.
Compare this to Nokia 5800, which I repaired(broken lcd screen) after 3 years without any fuss, just 4k rs and 1 day! and it was ready to go...
I hate sony now and would ask fellow Indian users at least to refrain from Sony(as we buy phones off contract with meager 1 year warranty). I am so disappointed that now paying more than 10k for 1 year warranty seems very illogical to me! I am now all for micromax, xiomi and all such cheap phones! They are much much more value for money than this sony crap.
oke so i fell in love with the G3, but not the d855 version (specs) i live outside the us. my first was the d850 version (att) after unlocking it all seemed fine at first. but i noticed that on 50% battery life the phone starting to reboot when receiving calls sometimes even shutdown. i had to plug it in a usb to get it to start up again. decided to sell it and moved to my next G3. this time it was the d851 version (tmobile) after unlocking the same issue started. now i'm up to my 3th g3 (d851). this one is even worse. it will reboot form time to time for no reason. i use standard apps (whatsapp,skype,intsa....) does anybody else have this same problem?
same problem with 3 d851 now, also did the battery mod, still not fixed, need help!!!
Hey,
since a few days, I'm not able to access 3G/LTE anymore in Germany with European G4 H815. Bootloader is unlocked (so no warranty for me).
I already reflashed it with KDZ with CSE flash, also tried to enable/reflash LTE Bands described here:
http://forum.xda-developers.com/g4/general/guide-enabling-lte-bands-t3137818
2G/GSM/Edge is possible, not more. Forcing the network to use 3G only results in no connection to the network.
Tried also swapping SIM cards with my GFs smartphone, her SIM card can also only get GSM in my G4, my SIM card can easily get H+ on her smartphone.
May this be a defective modem, or maybe a software bug? I flashed Genisys Rom, now back to stock.
Help would be greatly appreciated! Any thoughts?
Kind regards
Have you tried erasing and then adding in a new APN? If it worked prior this would be a good starting place
Thanks for the answer! Yes, I tried any possible APN configuration.
On my wife's h815 I can't test this as access is denied, but your on genisys ROM so it may let you
Open the dialer and type
*#*#4636#*#*
Hey,
I tried it, but could not click Phone Info. Error message is:
This application does not work on this device.
When I first rooted the G4, I backuped all system partitions. Maybe I should try to revert them all? I already tried to restore MODEM, MODEMST1 and MODEMST2.
Or could this be dangerous?
Kind regards
Yeah same with my wife's phone, it's strange were locked out there..
Restoring those partitions shouldn't hurt anything but I'm not very familiar with this phone so can't attest to anything for sure and the wife is on holiday so I can't check her phone
When you went through apns, did you try to first erase them all completely? If not try that, then make a new one
Yeah, I've got only one APN. I also requested a new one by my provider via SMS.
I wonder if the modem itself is defective. Maybe it got fried by wireless charging, I'm using a chinese Qi-Sticker and replaced the original one.
Are you using wireless charging?
No, just a cheap dock, but as far as I know that won't fry the internals or interfere with the radio at all
The reason I keep asking if you fully erased all apns and start over is I had to do this with a 2013 motox when it switched to lollipop, for some reason all apns had to be erased and then readded to get lte/3g to work again, the phone was stuck on edge just like yours
Okay, I found out by chance today, that there is 3G/HSPA reception possible. I was standing outside 100m away from a cell tower, and had medium reception. Maybe there is a problem with the internal antenna?
Oh, and by the way, I can see LTE network here at home (but no HSPA), but don't have a LTE contract, so I can't connect to it.
Maybe next time, when you are next to a cell tower, you try it yourself?
I haven't found a solution.
LG refuses to repair to my G4 for free, but I buyed the phone at Amazon (De). I called the hotline, they cover the warranty for 2 years, so today I sent the phone in for repair.
I'll keep you updated if Amazon repairs it despite the bootloader being unlocked (I told them before).
Sorry I couldn't offer a technical solution for anyone with the same problem
This is what happened in the meantime:
I sent the phone to an Amazon Partner Service Center. They refused to repair it under warranty - Bootloader unlocked. They offered me to replace the motherboard with a new one - 283€ incl shipping
After that offer, I called Amazon that their partner would not repair the phone under warranty.
They then sent me a brand new G4 for free! After I already had received the new unit from Amazon, of course I had to send back the defective G4 (when it came 10 days later from the repair service).
My friend has exactly the same problem.
Bootloader is unlocked. Tried to go back to stock MM 20c firmware from Imperium v1 Rom, but that didn't work. Also no update to 20d is offered by LG. If i force to use 3G, the phone can't connect to the cell network. Only edge does work. APN looks also good. Furthermore i tried to flash a new/other modem, but that didn't work also :/
Does someone have any suggestions to fix this problem?
@t000x: Was unlocked bootloader and therefore no warranty no problem for amazon.de?
Hi hasenbolle,
try restoring the firmware first, before shipping it back:
http://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
Yes, Amazon gave me a new unit despite the bootloader being unlocked.
But first I had to send it to their partner service Center and wait a few days.
Good luck with that phone.
Any help would be greatly appreciated, this issue is quite obnoxious.
My Verizon LG G3 was running 5.0.1 lollipop just fine until last wednesday.
I was sitting reading a phandroid article at my desk, when a message popped up saying sim card not recognized. I tried restarting, removing battery, and finally removing sim. Sometimes after restarting it would get a greyed out 3g signal and allow phone calls but no data and say entering global mode. I got on the phone with verizon and by the time they answered after pulling sim and doing a couple restarts it had started working again. It worked for a few restarts and a battery pull, but then stopped working about an hour later. I went to verizon store got a new sim card, and it worked phone. I switched it off global because they told me that wastes battery (is this bull**** or true?) it worked for a couple of days, then died again. Then it started working again the next day or 2, and it automatically forced the 5.1.1 update while in my pocket. It worked for a few hours after that then lost sim again. The next day it worked again. Now I can't get it working again.
I should also mention this might just be coincidental, but everytime it stopped working was within 10 minutes of me swapping in a fresh battery. Both of my batteries are official LG batteries, and I charge them with the official
TL: DR
my phone keeps not recognizing my sim and is now running 5.1.1.
Any ideas for what my next step should be?
Should I replace sim a 2nd time?
Should I do a factory reset, is there any chance that would fix this? (I haven't done one since I got my phone and used the image from my first G3. So my phone has done 3 updates without a FDR. But i'd really also hate to lose my progress on some games unless I absolutely had to.
Should I have verizon send it to LG for repairs (takes like 2 weeks) (I think it's still in warranty since I got the phone 12/16/2014) But that was after returning my first G3 i got in september i'm not sure when they start their warranty period
Should I replace it through my asurion insurance?
Other ideas?
So I was just using my phone when all of a sudden it turned off... It had about 70% battery life left. I tried to turn it back on with no avail... Pulled the battery and put it back in after a few seconds and was still unable to get it to turn on. So I have my spare battery that a popped in there and it still wont turn on. Eventually I got it to turn on for a few minutes where it just boot-looped then turned off again. I have now tried plugging it in and swapping batteries and such and I can't even get it to turn on. If I plug it in without a battery all I see if a picture of a battery with a "?" in it but it will not power up. I think my phone is toast and I have no idea what is wrong with it. Anyone else had this happen to them?
See: http://forum.xda-developers.com/g4/help/lg-g4-stuck-bootloop-t3268734
Seems to be a problem with the batch of phones manufactured in May 2015. Mine crapped out today, pretty much exactly the way you described, and T-Mobile is overnighting a replacement.
T-Mobile will send you a "refurbished" unit and issue the replacement using insurance. The warranty information is available from the LG Support page. The Warranty statement begins on page 124 of the English version of the manual. The replacement that was sent to me was not well kept and had signs of being mistreated previously. I called T-Mobile and informed them that I was sending back their replacement. I called LG and my phone is currently being repaired after being received this morning.
From the warranty section of the G4's manual:
5. HOW TO GET WARRANTY SERVICE:
To obtain warranty service, please call or fax to the following telephone numbers from
anywhere in the continental United States:
Tel. 1-800-793-8896 or Fax. 1-800-448-4026
LG G4 is a very vulnerable phone and LG’s Head of US Marketing has accepted that the LG g 4s manufactured before September 2015 had its own set of problems. I am leaving this link here https://appuals.com/fix-lg-g4-wont-turn/ for anyone who wants to solve the issues with LG G4 mobiles instead of being frustrated or feeling at loss. Hope this guide help you guys out.