Need advice to avoid be stuked in bootloop - T-Mobile LG G4

Hello everybody
am from algeria
i have bought an old g4 h810 sim unlooked everything was great till the phone restart and stay on lg boot logo ! (it seems be dead)
seller was so gentel and change it for me after 20 days of use
now i have a h811 t-mobile (sim unlooked) lollipop android (5.)
my question is ;
how to avoid the bootloop problem????? because i think there is no solution for it
is there a risk if i upgrade it to marshmallow version ??

elaid1988 said:
Hello everybody
am from algeria
i have bought an old g4 h810 sim unlooked everything was great till the phone restart and stay on lg boot logo ! (it seems be dead)
seller was so gentel and change it for me after 20 days of use
now i have a h811 t-mobile (sim unlooked) lollipop android (5.)
my question is ;
how to avoid the bootloop problem????? because i think there is no solution for it
is there a risk if i upgrade it to marshmallow version ??
Click to expand...
Click to collapse
no risk but phone would more likely bootloop if its not a phone manufactured from jan 2016 up until now.
you dont know it may or may not but for olde models its more likey.

Related

LG G2 VERIZON can be relocked after update ?

hello guys
i juste wanna buy an LG G2 VERIZON, but used, and it's now unlocked it can work with all operators
but i really plan to update it to a lollipop, so will it be relocked again after update ? because i don't have the unlock code, and also i don't know if it's officially unlocked or by another method, how can i check that if there is really another method
i ask theses questions because it happened to me with a SONY XPERIA SP, it was unlocked and everything ok, after update fail i tried repair with : pc companion, and i get a phone simlocked grrrrrrr
so i don't want to live an experience like that again
Somebody please correct me if I'm wrong, but I thought it was a requirement for Verizon to unlock these phones due to some FCC settlement over spectrum? I think you'll be fine.

Carrier unlock a G920T permanently

Hi guys,
I need some clarification re: carrier unlocking and how it works. I recently purchased a carrier unlocked G920T, and I was going to start messing with custom roms/kernels and other goodies. My question is: Will the phone revert back to being locked if I do a factory reset or if I unlock the bootloader and flash custom roms?
I'm not a T-Mobile user, so I can't get another unlock code from them.
Thanks!!
The G920T has a carrier unlocked version, which is probably the one you have, not the T-Mobile one. Even if it is, usually a carrier unlocked device will remain unlocked forever unless it was unlocked using a different or hacky method, then there is a possibility that it will relock
Sent from my SM-G920T using Tapatalk
Yeahh go ahead, mess with it. when it is carrier unlocked, the software doesn't affect it, unless it is a hacky method like @serio22 said, but there isnt such hacky method for the GS6 so have fun.
If it is a G920T (the T means it's from T-Mobile), then carrier unlocking is not a guaranteed state. I paid T-Mobile the full price to get my GS6 and they "permanently" unlocked it. Then after a OTA software patch all of a sudden it locked itself again and I couldn't use my phone for 2 days while they tried to unlock it. T-Mobile's new device unlocking uses a new system which has the phone "phone home" to their servers to check if you're allowed to use it outside of their network. It happened again when I accepted the Android 5.1.1 OTA. So...beware of T-Mobile's not-very-permanent permanent carrier unlocking.
I am living in india..
My relatives brought me the t model ( i wanted f model instead of i sold in india for quicker updates but got t model...lol )
Anyways,
The moment i inserted my sim, it worked like a charm so its unlocked at the moment.
I dont know how they made payment their or how it was unlocked, but the way used must be legit coz its still stock at the moment without root / recovery etc. .
I read humo saying it can get locked again...
My main question, what are the odds of that happening?
Also since i live in india, i wont be able to contact t mobile via phone/walk in, are there ways i can get it unlocked again?
I dont have the bill too if it matters
i believe they have an app that unlock ur device since that is how i unlocked mine. if not u can try to contact customer service online since u r not in US.
With device unlock app , will i have to pay for unlock my s6 g920t or it'll unlock my device for free.
I have an unlocked s6 tmobile from usa, i heard the flashing stock rom will relock the device.
If the phone will relock then how can i unlock it again?
I'm not sure about flashing a stock ROM relocking the device. Mine re-locked when T-Mobile sent Android security patches. This week I did the Android 6.0 OTA update and it has remained unlocked.
Hey guys! i have a factory unlocked version of s6 tmobile, my question is if i can flash the tmobile MM firmware . My model says "country: cellular south" and the firmware country says us tmobile, so i dont know if i can flash without any problems, (Sorry for my english it sucks) thanks !
polipol15 said:
Hey guys! i have a factory unlocked version of s6 tmobile, my question is if i can flash the tmobile MM firmware . My model says "country: cellular south" and the firmware country says us tmobile, so i dont know if i can flash without any problems, (Sorry for my english it sucks) thanks !
Click to expand...
Click to collapse
Polio, i have the same phone and i flashed MM without any problems. Check out the q&a section here and theres a recent thread that talks about how to that refers to a reddit post
Sent from my SM-G920T using XDA-Developers mobile app
bitbank said:
If it is a G920T (the T means it's from T-Mobile), then carrier unlocking is not a guaranteed state. I paid T-Mobile the full price to get my GS6 and they "permanently" unlocked it. Then after a OTA software patch all of a sudden it locked itself again and I couldn't use my phone for 2 days while they tried to unlock it. T-Mobile's new device unlocking uses a new system which has the phone "phone home" to their servers to check if you're allowed to use it outside of their network. It happened again when I accepted the Android 5.1.1 OTA. So...beware of T-Mobile's not-very-permanent permanent carrier unlocking.
Click to expand...
Click to collapse
How did you solve this? My phone stopped working flashed newest (G920TUES5DPK1_G920TXAR5DPK1_G920TUES5DPK1_HOME.tar.rar) and i can't go to older version as that gives me ;
Code:
SW REV. CHECK FAIL DEVICE: 5 BINARY: 3
Christiaanjadieja said:
How did you solve this? My phone stopped working flashed newest (G920TUES5DPK1_G920TXAR5DPK1_G920TUES5DPK1_HOME.tar.rar) and i can't go to older version as that gives me ;
Code:
SW REV. CHECK FAIL DEVICE: 5 BINARY: 3
Click to expand...
Click to collapse
You can't downgrade your bootloader so you'd have to pay to unlock it unfortunately
crixley said:
You can't downgrade your bootloader so you'd have to pay to unlock it unfortunately
Click to expand...
Click to collapse
Got it done remotely!
I have a Galaxy S6 (SM-G920T) from T-Mobile. It was locked. But it has an "Unlock" app installed by default. I used it and phone was instantly unlocked! Fast, easy and free!
I used to live in the US for a year and bought a g920T. Since i had the requirements i Unlocked and came back to my country but because of a problem, I had to install a stock firmware and now the unlock is gone.
So i'm wondering, if someone with a unlocked phone made firmware backup, remove the IMEI, and send it online would it work? I mean, right now it works just fine, so i can backup my IMEI and ID and just restore it if needed.
Please help
danveer said:
I am living in india..
My relatives brought me the t model ( i wanted f model instead of i sold in india for quicker updates but got t model...lol )
Anyways,
The moment i inserted my sim, it worked like a charm so its unlocked at the moment.
I dont know how they made payment their or how it was unlocked, but the way used must be legit coz its still stock at the moment without root / recovery etc. .
I read humo saying it can get locked again...
My main question, what are the odds of that happening?
Also since i live in india, i wont be able to contact t mobile via phone/walk in, are there ways i can get it unlocked again?
I dont have the bill too if it matters
Click to expand...
Click to collapse
I am in same scenario as you are/were,I am also having s6 (Tmobile) please tell me did flashing relocked your device?
So far no
I have flashed recovery - custom rom - kernel
Messed up sometimes so even went back to stock using odin then flashed everything again
Its still unkocked
Hello! I've bought my S6 (SM-G920T) as carrier unlocked but when my pcb has burned due to factory fault and sent my phone to Samsung they gave me again it was locked. I'm from Argentina and I haven't T-Mobile sim to unlock with default application. I've called to my carrier in Argentina and they said me the IMEI it's unlocked but my phone still sais it's network blocked... Can anybody help me?
vita_lp said:
Hello! I've bought my S6 (SM-G920T) as carrier unlocked but when my pcb has burned due to factory fault and sent my phone to Samsung they gave me again it was locked. I'm from Argentina and I haven't T-Mobile sim to unlock with default application. I've called to my carrier in Argentina and they said me the IMEI it's unlocked but my phone still sais it's network blocked... Can anybody help me?
Click to expand...
Click to collapse
Have you tried with the tmobile device unloced app.? If that doesnt work then head over to this awesome guy, he can help you unlock it remotely. https://forum.xda-developers.com/tmobile-galaxy-s6/general/sim-unlock-honestly-free-t3601740

Question. Buying a G4.

Currently in the process of selling my s7 and I'm looking to buy a g4. In USA for T-Mobile.
My question is which firmware should I look for before buying. In regards to rooting/recovery/downgrading which firmware is best?
Thanks in advance guy.
js0uth said:
Currently in the process of selling my s7 and I'm looking to buy a g4.
My question is which firmware should I look for before buying. In regards to rooting/recovery/downgrading which firmware is best?
Thanks in advance guy.
Click to expand...
Click to collapse
well if you are in america or USA. get the h811 this one can be unlocked bootloader.. the rest cant.. only the H815 international for some countries can also be unlocked bootloader...
before buying you should know tha LG G4 suffers from bootloop issue. its a hardware defect.. that needs the motherboard changed.. try getting phone made in this year with the 3 first digits starting from 6XX the higher the better.. alot of phone bootloop even if they were made this year..
as for firmware. LP battery last longer. to unlock bootloader you must be on 20i.. firmware.. those 2 are V2 antirollback you can update or downgrade from this 2.. if phone has 20o then you stuck ther thats the latest but its V3 antirollback downgrading willl brick phone...
raptorddd said:
well if you are in america or USA. get the h811 this one can be unlocked bootloader.. the rest cant.. only the H815 international for some countries can also be unlocked bootloader...
before buying you should know tha LG G4 suffers from bootloop issue. its a hardware defect.. that needs the motherboard changed.. try getting phone made in this year with the 3 first digits starting from 6XX the higher the better.. alot of phone bootloop even if they were made this year..
as for firmware. LP battery last longer. to unlock bootloader you must be on 20i.. firmware.. those 2 are V2 antirollback you can update or downgrade from this 2.. if phone has 20o then you stuck ther thats the latest but its V3 antirollback downgrading willl brick phone...
Click to expand...
Click to collapse
Wow. Thank you very much for all that. I didn't know about the bootloop problems.
So I found one on Craigslist. It's on 20i on marshmallow.
So regarding the bootloop, he said he got a warranty replacement on his original g4 but for another reason, but the manufacturer date for the replacement he got is 507 which he said he received a few weeks ago. So I'm wondering if this replacement would have the bootloop fixed. Any thought on this?
js0uth said:
So I found one on Craigslist. It's on 20i on marshmallow.
So regarding the bootloop, he said he got a warranty replacement on his original g4 but for another reason, but the manufacturer date for the replacement he got is 507 which he said he received a few weeks ago. So I'm wondering if this replacement would have the bootloop fixed. Any thought on this?
Click to expand...
Click to collapse
no matter even new ones do bootloop not all will but thers a 80% chance... according to LG they fix it on 510 that means phone was mannufactured on 201 5 10 =october.. so october month 10 year 2015 5-10..
read up a little.. i wouldnt go gfor that one.. try getting 6XX.. and even that wont assure you wont get bootloop..
anything else just ask.. :good:
https://www.reddit.com/r/lgg4/comments/4dibyz/bootlooped_post_your_info_here_megathread/
raptorddd said:
well if you are in america or USA. get the h811 this one can be unlocked bootloader.. the rest cant.. only the H815 international for some countries can also be unlocked bootloader...
before buying you should know tha LG G4 suffers from bootloop issue. its a hardware defect.. that needs the motherboard changed.. try getting phone made in this year with the 3 first digits starting from 6XX the higher the better.. alot of phone bootloop even if they were made this year..
as for firmware. LP battery last longer. to unlock bootloader you must be on 20i.. firmware.. those 2 are V2 antirollback you can update or downgrade from this 2.. if phone has 20o then you stuck ther thats the latest but its V3 antirollback downgrading willl brick phone...
Click to expand...
Click to collapse
raptorddd said:
no matter even new ones do bootloop not all will but thers a 80% chance... according to LG they fix it on 510 that means phone was mannufactured on 201 5 10 =october.. so october month 10 year 2015 5-10..
read up a little.. i wouldnt go gfor that one.. try getting 6XX.. and even that wont assure you wont get bootloop..
anything else just ask.. :good:
https://www.reddit.com/r/lgg4/comments/4dibyz/bootlooped_post_your_info_here_megathread/
Click to expand...
Click to collapse
Thanks for that.
Yea. Been on it all day. As much as I want it. I don't think it's worth it to have to worry about that. That's shouldn't have to be a problem, sucks for all the people that went and currently going through it. Probably going to pass this up.
Thanks you two.
Close thread.

Sim Locked after Upgrading to MM 20v

I have Upgraded my T mobile G4 to MM 20v From 10o
I flash The kdz File With LGUP and select refurbish with bin file ticked
I have Sim unlocked Before I flash 20v
After i flash 20v My G4 Is sim locked
I see a Screen after Lock screen open it Says "this device Can Be remotely unlocked if eligible"
I try the device unlock app , but it says failure
What should I do
Anyone plz help me here:crying:
Very very big thanks if you guys can solve my problem
Iam nothing without my SIM card
QuantumDroid said:
I have Upgraded my T mobile G4 to MM 20v From 10o
I flash The kdz File With LGUP and select refurbish with bin file ticked
I have Sim unlocked Before I flash 20v
After i flash 20v My G4 Is sim locked
I see a Screen after Lock screen open it Says "this device Can Be remotely unlocked if eligible"
I try the device unlock app , but it says failure
What should I do
Anyone plz help me here:crying:
Very very big thanks if you guys can solve my problem
Iam nothing without my SIM card
Click to expand...
Click to collapse
only thing that comes to my mind is that your phone is not a h811......
plastic and software says it is. but maybe your motherboard could be h810...
if you cant find a fix for this.. open it up search for dissasembled video of LG G4 and take motherboard out physically.
and read the plaque variant model... maybe its not h811 thats why it might say its locked..
or return it.
raptorddd said:
only thing that comes to my mind is that your phone is not a h811......
plastic and software says it is. but maybe your motherboard could be h810...
if you cant find a fix for this.. open it up search for dissasembled video of LG G4 and take motherboard out physically.
and read the plaque variant model... maybe its not h811 thats why it might say its locked..
or return it.
Click to expand...
Click to collapse
Just take out the motherboard an my phone is h810
Is that the reason why my software version is weird (10o)
And cant the the ota update ?
But why i can flash h811 kdz on my h810 motherboard
QuantumDroid said:
Just take out the motherboard an my phone is h810
Is that the reason why my software version is weird (10o)
And cant the the ota update ?
But why i can flash h811 kdz on my h810 motherboard
Click to expand...
Click to collapse
i beleive so.. so now since you have a h810 flash that variant KDZ.
raptorddd said:
i beleive so.. so now since you have a h810 flash that variant KDZ.
Click to expand...
Click to collapse
Is That will sim unlock my phone ?
QuantumDroid said:
Is That will sim unlock my phone ?
Click to expand...
Click to collapse
i guess.. since probably you had a h810 rom but software was edited to read as h811.
maybe maybe not..
raptorddd said:
i guess.. since probably you had a h810 rom but software was edited to read as h811.
maybe maybe not..
Click to expand...
Click to collapse
I Cant Stand It out..
Just go to the store And take A H815t G4
Fortunately the owner doesnt know that i locked the phone :laugh:
Btw do you know some information abour h815t hongkong variant ?
QuantumDroid said:
I Cant Stand It out..
Just go to the store And take A H815t G4
Fortunately the owner doesnt know that i locked the phone :laugh:
Btw do you know some information abour h815t hongkong variant ?
Click to expand...
Click to collapse
no i dont.
Same with me

Question [help] get rif of verizon on SM-G998U

Hello,
Can you help get rid of verizon on my phone. Its was working on state and now Im travelling in France and stoped working.
Ive download different version with Frija and install them with odin but nothing change.
Now I'm trying anther solution with flashboot as described below
I just bootloader unlocked a Verizon branded Pixel 3 - how is this possible??
I mean, I'm not complaining. But I was incredibly surprised! I bought the phone BRAND NEW AND SEALED, from the current sale on woot ($170), and yet was still intending on returning it after I realized I had bought a Verizon variant, albeit...
forum.xda-developers.com
but flashboot devices command returns nothing (adb devices is wotking)
BTW my drivers are uptodate
Any ideas !!
Thanks in advance

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