[Q] lg g3 d856 stucks in gsm mode

[commando0]

i have lg g3 dual d856
its official 5.01
now rooted
stock recovery

sim 1 has option for 4g 3g and 2g
sim 2 slot is for 2g only

i was using sim 1 for 3g and sim 2 for calls
but latter on i got some free 3g data on sim 2

i physically swapped sim slots of sims for using 3g of sim 2

now my sim 2 was in 4g/3g/2g slot of phone
and sim 1 was in 2g slot of phone

upon reboot i was unable to use 3g on sim one
while selecting manually error was shown that sim 2 is in wcdma mode ...
now mannual searching for networks in sim 1 only showing gsm signal
while sim 2 showing 3g networks

restart reboot nothing worked

factory reset solved the issue
but again upon swapping sims phone was stuck in gsm mode on both sim
again factory reset did the job .....

an y one else having this issue ?

 

[commando0]

Only work around is downgrade to kitkat....

 

[msundman]

upon reboot i was unable to use 3g on sim one
while selecting manually error was shown that sim 2 is in wcdma mode ...
now mannual searching for networks in sim 1 only showing gsm signal
while sim 2 showing 3g networks

restart reboot nothing worked

factory reset solved the issue
but again upon swapping sims phone was stuck in gsm mode on both sim
again factory reset did the job .....

an y one else having this issue ?

I'm having the same issue. For me factory reset didn't fix it. However, now slot 2 runs 3g/4g while slot 1 is stuck in 2g, so I just put my data sim into the slot marked 2G (which now runs 3G/4G) and my other sim into the slot marked 2G/3G/4G (which now runs only 2G), and that works just fine. The 2G/3G/4G setting for slot 1 does nothing now, and there's no such setting for slot 2, but the latter is running 3G/4G anyway, so I'm ok with that.

 

[commando0]

I'm having the same issue. For me factory reset didn't fix it. However, now slot 2 runs 3g/4g while slot 1 is stuck in 2g, so I just put my data sim into the slot marked 2G (which now runs 3G/4G) and my other sim into the slot marked 2G/3G/4G (which now runs only 2G), and that works just fine. The 2G/3G/4G setting for slot 1 does nothing now, and there's no such setting for slot 2, but the latter is running 3G/4G anyway, so I'm ok with that.

which firmware are you on?

one work around is switch both sims to 2g then replace sim and re boot ....

factory reset while both sim are removed
but i think this issue is not present in official 6 update.

 

[msundman]

which firmware are you on?

5.0.1 D85620b-CIS-XX it says, and update center says it's the newest.

one work around is switch both sims to 2g then replace sim and re boot ....

Slot 1 is already stuck at "GSM only" and slot 2 doesn't have that setting at all, so not really sure how to do that.

 

[commando0]

download flash latest firmware LGD856 v20c from here

http://lg-phone-firmware.com/index.php?id_mod=41


back up your data ( all data will be erased )
remove sd card
remove both sims
flash it ( for guide search in forum )
after booting turn on phone use it for while and again factory reset it
now put both sims and it will be normal again i.e sim for 2g 3g and lte and sim 2 for 2g
one bug i have noted in v30b firmware that if we search mobile network in manually it will return error but auto network search will work normally

 

[msundman]

download flash latest firmware LGD856 v20c from here

Is there some reason not to flash version V30C instead? Will I have a problem rooting it?
(Actually I seem to have lost root somehow in my current setup as well, I really need it back..)

 

[commando0]

Humm
For root i won't recommend it .....

Sent from my Redmi Note 3 using Tapatalk

 

[commando0]

Actually the thread is year old ...&
I have personally changed lg 3 ...
V30b was my last firmware ....
Rooting was not done
Only bug i came across was network manual search was returning error....
And battery drain was insane also ....
Rest was improved



Sent from my Redmi Note 3 using Tapatalk

 

[msundman]

I've installed crDroid running android 7.1.1 and now both my sim slots support 4G.