Downgrading and Upgrading questions
Hello XDA.
I've got the LG G3 D855 and I got it with android 4.4.2 and than I upgraded it to lollipop (right now I'm with v20H) and I knew that the device is capable with 4G so I talked with my carrier and I finally had the 4G enabled on my phone.
But I suddenly faced the bugs of lollipop and I decided to downgrade back to 4.4.2, it was alright but the 4G capability dissapeared of anything even in the menu there was no option for LTE so I upgrade back for lollipop again and it was ok and I got my 4G back :good:
So my question is why did it happened ? and I want to know what to do if i'll downgrade back again and still have the 4G enabled and not lose it.
Thank you.
Amit Yeffet said:
Hello XDA.
I've got the LG G3 D855 and I got it with android 4.4.2 and than I upgraded it to lollipop (right now I'm with v20H) and I knew that the device is capable with 4G so I talked with my carrier and I finally had the 4G enabled on my phone.
But I suddenly faced the bugs of lollipop and I decided to downgrade back to 4.4.2, it was alright but the 4G capability dissapeared of anything even in the menu there was no option for LTE so I upgrade back for lollipop again and it was ok and I got my 4G back :good:
So my question is why did it happened ? and I want to know what to do if i'll downgrade back again and still have the 4G enabled and not lose it.
Thank you.
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Click to collapse
can somebody please help me an answer please.
Amit Yeffet said:
can somebody please help me an answer please.
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If you downgrade from Lollipop to Kitkat your modem is gone that's why you dont have network now ,you have to download the KitKat modem for your firmware version and all will be fine
Flash it in custom recovery
ludoke said:
If you downgrade from Lollipop to Kitkat your modem is gone that's why you dont have network now ,you have to download the KitKat modem for your firmware version and all will be fine
Flash it in custom recovery
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Wrong answer. If the "Modem" was gone, he couldn't get any service. So, modem is OK.
You can activate LTE manually;
1- Go to Dialer
2- Type *#*#4636#*#*
3- Select Phone Information
4- You should see a long box end of page. Change the section in box to one of LTE modes.
Related
hey one of my friends rooted my phone and im not sure how to un root or take advantage of it being rooted im trying to update to the 5.0 lollipop but it wont let me im with tmobile and my g3 is the 4.4.2 KITKAT and model LG-D851 any help would be great thanks
jprofit88 said:
hey one of my friends rooted my phone and im not sure how to un root or take advantage of it being rooted im trying to update to the 5.0 lollipop but it wont let me im with tmobile and my g3 is the 4.4.2 KITKAT and model LG-D851 any help would be great thanks
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You need to have a fully function T-Mobile sim inside your phone in order for the update to show up
I do my phone works just fine but i wont get the update with my phone being rooted i work for tmobile and they dont wont send update with rooted phone and i already tried downloading there software on my computer for the update but it wont work
Go to supersu app and in the settings there is a full unroot option.
jprofit88 said:
hey one of my friends rooted my phone and im not sure how to un root or take advantage of it being rooted im trying to update to the 5.0 lollipop but it wont let me im with tmobile and my g3 is the 4.4.2 KITKAT and model LG-D851 any help would be great thanks
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Click to collapse
The "cleanest" way of Un-Rooting is this one :- http://forum.xda-developers.com/showthread.php?t=2802286
I have recently rooted my US Cellular G3, and now want to update it to Lollipop 5.0. If I use the regular LG Mobile support, will it get rid of my root? If so, can anyone post a flashable ROM that is just stock 5.0? I downloaded the 5.0 KDZ for the US Cellular phone, and extracted the System, Boot, and Modem.imgs, but the system.img isnt flashing correctly, leaving it soft bricked(Thank the lord form backups). If anyone know anything or could help me I would really appreciate it.
Thanks
wrong section and u can update and root after
buski said:
wrong section and u can update and root after
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Sorry, Im new to posting on the forums
I'd say use ADB to push the IMG files but I'm not sure if the lollipop root method would work on USC variant. I don't see much about that variant on the forums and I actually don't think I have seen the USC model # listed in any ROM topics here
I have Lg F240-EUR version, which is running on 4.1.2.but the software/os that came with the phone is slightly different from the original firmware.And the signal is sometimes dropping like showing x mark for 3-5 times a day.and the main problem is it cant be updated to any version.I checked in the IMEI website and found that my model is f240s.If I upgrade thehpone,i will loose signal forever as some people mentioned that they lost signal after upgrading their phone through custom roms or official firmware in other forums.I want to upgrade my phone to either official 5.0 or any custom 5.0 rom. please help me in upgrading my phone so that i shouldn't loose the signal even after the update.
krishna13 said:
I have Lg F240-EUR version, which is running on 4.1.2.but the software/os that came with the phone is slightly different from the original firmware.And the signal is sometimes dropping like showing x mark for 3-5 times a day.and the main problem is it cant be updated to any version.I checked in the IMEI website and found that my model is f240s.If I upgrade thehpone,i will loose signal forever as some people mentioned that they lost signal after upgrading their phone through custom roms or official firmware in other forums.I want to upgrade my phone to either official 5.0 or any custom 5.0 rom. please help me in upgrading my phone so that i shouldn't loose the signal even after the update.
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I bought a similar refurbished phone from Aliexpress and the system information is the same as yours. I think they just messed with the build.prop so the build information looks ready for Europe. I will advise you to install the kdz so you have the Stock ROM and firmware. That was what I did anyway. The only porblem is that you will get some Korean apps but the phone is stable anyway. And when flashing, use "CSC" not "Normal" flash.
By the way, my phone was lagging very much before I installed the Stock ROM.
lallolu said:
I bought a similar refurbished phone from Aliexpress and the system information is the same as yours. I think they just messed with the build.prop so the build information looks ready for Europe. I will advise you to install the kdz so you have the Stock ROM and firmware. That was what I did anyway. The only porblem is that you will get some Korean apps but the phone is stable anyway. And when flashing, use "CSC" not "Normal" flash.
By the way, my phone was lagging very much before I installed the Stock ROM.
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So after upgrading ,is ur phn showing signal normal?many mentioned that after upgrading they lost their mobile signal and their imri number to all zeros.so are u sure this wont happen to me?i am frm india.so there will be no problem with the bandwidths for networks in india?
At present even my phone running on 4.1.2,whenever i enable my data,after disabling it my signal shows x mark for 2-4 seconds then i will get back again.also some cals cant connect to my phn.so after upgrading,are there any chances of loosing my phone signal?
krishna13 said:
So after upgrading ,is ur phn showing signal normal?many mentioned that after upgrading they lost their mobile signal and their imri number to all zeros.so are u sure this wont happen to me?i am frm india.so there will be no problem with the bandwidths for networks in india?
At present even my phone running on 4.1.2,whenever i enable my data,after disabling it my signal shows x mark for 2-4 seconds then i will get back again.also some cals cant connect to my phn.so after upgrading,are there any chances of loosing my phone signal?
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I cannot reaqlly gurantee your phone being messed up but mine works perfectly after installing the kdz. I installed the 4.4.2 version although there is lollipop version as well. I just want to try the kitkat version for some time.
lallolu said:
I cannot reaqlly gurantee your phone being messed up but mine works perfectly after installing the kdz. I installed the 4.4.2 version although there is lollipop version as well. I just want to try the kitkat version for some time.
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I am unable to install custom recovery on my f240s.can u pls help me with the steps and links inorder to take backup of my current version. Also one doubt.If anything goes wrong after upgrading to lollipop (like if i lost signal in my phone) then after restoring the backup rom,can i get the signal back?? Also which is better? Some complained that after upgrading to lollipop they got signal issues.is installing kitkat= installing lollipop or is there any difference considering to the signal prblm?
(sorry for my bad english but i need help.pls suggest me)
Hello,
I followed this guide to restore my sprint LG G2 to stock Kitkat 4.4.2. Everything went fine, the phone is working, the only problem I have is that I can't connect to any network. The phone is not recognizing any of the local network providers. I bought this phone on ebay and it came with a custom rooted rom installed on it, so I decided to "clean up the mess" and restored stock kitkat. As I mentioned before everything went fine, but the network is not working (it was working with the android version before i restored stock 4.4.2). Maybe its because I'm not living in the USA (I'm from Bosnia/Europe). Should I flash a different radio on it? The phone is updating atm with OTA and I'm pretty sure that the updates wont help. Did anyone else had these issues? Any help would be highly appreciated.
Update: My phone just got upgraded to Lollipop, but the network issue is still present
Update 2: I just reinstalled "cm-12.1-20151031-NIGHTLY-ls980" Lollipop 5.1.1. and it had no problems to find all the networks in my area, so this clearly has to do with stock LG android 4.4.2.
When you say you can't connect to network, are you referring to your mobile carrier network, or like WiFi?
If it's your mobile carrier that you can't connect to, you might need to switch your radio. Take a look at this guide and the section about using radio switcher: http://forum.xda-developers.com/sprint-g2/help/how-sprint-lg-g2-ls980-to-t-mobile-t3230685
Fuzz1303 said:
When you say you can't connect to network, are you referring to your mobile carrier network, or like WiFi?
If it's your mobile carrier that you can't connect to, you might need to switch your radio. Take a look at this guide and the section about using radio switcher: http://forum.xda-developers.com/sprint-g2/help/how-sprint-lg-g2-ls980-to-t-mobile-t3230685
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Hey there. Sorry for the late response. I kinda gave up on making the stock LG ROM work, which is why I kept on using CM12.1 . What I was referring to was my mobile carrier. The phone has no problems connecting to any WiFi signal.
I didn't try to flash any radios at all after restoring the LG G2 stock ROM. Maybe I should have tried one of the radios from this CM12.1 for LG G2 tutorial. Here is a direct LINK to the full list of LG G2 radios, where I downloaded the radio for my phone. I'm not sure if the other LS980 Radios would work on my device. There are 4 different radios available for the LG G2 LS980.
Do you think flashing one of these radios would help solving this problem after restoring the LG stock ROM?
Dear all,
I got a strange situation and I've tried several options already, but I'm lost.
My LG G3 D851 (T-Mobile) is currently running on Lineoage OS 8.1 and my 4G is not working.
Even though I selected 4G preferred. Highest what I get is H+.
I've found a modem file, but that screwed up my 4G and 3G completely.
It doesnt matter which custom rom I select it will not allow me to work with 4G.
If I go back to the original Android 6 Rom I got 4G.
Who got an idea to get this fixed?
Is your IMEI still There ? Does your Phone Show Up at qpst? You did Not Read
anything i grüess so you probably havent Backes Up your efs? Ist there No Connection at all? Flashing Roms will Not fix your problem. But you should Go to Marshmallow Stock For now.
Custom Roms only Work with 21c and lower maybe you Just flashed The Wrong Modem. Google For The XDA LG G3 Modem thread
tritratrulala390 said:
Is your IMEI still There ? Does your Phone Show Up at qpst? You did Not Read
anything i grüess so you probably havent Backes Up your efs? Ist there No Connection at all? Flashing Roms will Not fix your problem. But you should Go to Marshmallow Stock For now.
Custom Roms only Work with 21c and lower maybe you Just flashed The Wrong Modem. Google For The XDA LG G3 Modem thread
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My IMEI is still tere.
Dont know what you mean with QPST.
I've got backups and I can go back to any state, but I dont know what I should even consider check the EFS?
I'll check the Modem thread.
Maybe I can find a solution in there.
tritratrulala390 said:
Custom Roms only Work with 21c and lower maybe you Just flashed The Wrong Modem. Google For The XDA LG G3 Modem thread
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The 21C thing is incorrect. Each variant of the G3 has their own set of modems. There is no 21C for the D851.
If memory serves we had 10 series (KitKat), 20 series (Lollipop), and 30 (Marshmallow). I'm currently using 30D modem from last time I had a factory stock installed. I get 4G/LTE on all of the installed ROMs (KK, LP, MM, N, O). Even when I was on 20G they were all good, though I didn't have Oreo at the time.
@Mr-Dutch, I have a small collection of D851 modems up on Mega. Since your last stock was Marshmallow I figure the ones to try, if you elect to do so, is 30D or 30E.
https://mega.nz/#F!WVRWmDII!oeZ17walw3sOi71mDkCKrw
LG G3 D851, Mahdi v2.9 ROM (4.4.4), microG (NoGApps), MultiROM, XDA Legacy
Yeah my Bad that was for The 855. And there IT says in The Post that IT only works Up to 21c but Not sure If thats still a Thing.
So have you tried flashing a Modem? And does IT Work now?