Service mode, lock LTE Bands

38 posts
Thanks Meter: 8
By Trampeltierr, Member on 12th February 2019, 09:16 PM
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20th March 2020, 07:18 PM |#11  
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Thanks Meter: 58
If you are facing problems of poor natwork whatever network on are u there is something for you to get Best network coverage

There are money tips n tricks are making round all over the internet
I'm also the one of them who has searched n searched on google about jio network

Than i found artical about network band
Band 3(1800)
Band 5(850)
Band 40(2300)
All above all are Lte band is jio provide to us
In my case I'll always get band 40 it's slowest band in my area why beacuse a phone automatically switches between band according to the strength of the signal in different locations

So 1thing i know that i have to control my network band or lock band 40
Than i searched and searched on google
I have read lot of article about changing your band easily
Read about different code for different mobile

For example *#*#4636#*#* or phone info to select network mode lte only nothing change same result

Than shortcut master to creat "service menu" or "Engineering mode" still no luck with different 2 device

Than *#001# it's work but can't change or lock anything

Than i finally found on Xda a magical code *#2263#
this is really magical code for Samsung devices
If it is work for you than you don't need any apps or U don't need to root your phone

Stil no luck
It doesn't work on my phone
Than searched about how to make this code to work i found small artical on xda and it's work

But you need root to access system file this guide is not work for non-rooted samsung phone

i have just tested on my s7 cutome rom of kill-switch black diomaond v7

So u need esfile explore
To perform this action

In Esfile explore goto
System/csc/etc Or System/omc/INS itc
Now look for the file name with
INS_keystrings.dat and rename it to something like xyz.keystrings.dat

Now go back to System/omc/XXV/etc and copy the xxv_keystrings.dat and paste the same where u have change file name
Omc/ins/etc and rename it INS_keystrings.dat now reboot phone

And U will see *#2263# code will stated to run
Now u can chhose any band you want or lock any band which u don't want

Note:-- what if you dont have xxv or sin csc than you look for xxv or sin csc and flash it
I think it will work without above trick but it doesn't than do it manually
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10th April 2020, 09:45 PM |#12  
Thanks Meter: 5
You can lock bands on hades rom v1.5 android 9 + select CSC XXV on install setup
work like a charm
use this code *#2263#
13th April 2020, 11:27 PM |#13  
Junior Member
Thanks Meter: 0
YEA This worked FLAWLESSLY Thank You so much for posting this... Along with your story...
It did not work at FIRST but I did some tinkering around in my M30S with Exynos and yea *#2263# is enabled

Basically what I did was that I [B]downloaded [/B and extracted sm-a520f_keystrings.dat inside the and renamed it to INS_Keystrings.dat; the Link to it is attached by Bryan here (Thanks to you also!) and pasted it where INS_Keystrings.dat RENAMING the original present in there.....In addition I also pasted the renamed sm-a520f_keystrings.dat to System/etc as suggested by Bryan

NOTE: Mine INS_Keystring.dat was NOT present in the system/omc/INS/etc...... but in product/omc/INS/etc..... the main point being that the required folders and file may be present anywhere and /System is not NECESSARY...... or just Search in the root explorer you may be using.... ALSO..... Dont forget to REBOOT otherwise it wouldn't work......

So you CAN enable service mode and change bands.... Just ROOT is needed as I have Android 10
17th May 2020, 09:15 PM |#14  
Junior Member
Thanks Meter: 0
Hello, I am new here, but I am trying to enter the service mode to enable the 4 LTE band, which is what works in my country (Venezuela) with two telephone operators.
on my phone which is a SM-A260G, I can't find the XXV file that they refer to, but I read that just like the download of the ZIP file it works, the serious question could this method work on my phone?
21st June 2020, 01:07 AM |#15  
Junior Member
Thanks Meter: 0
Lock bands, Samsung, easy peasy
You don't need to do anything with the files.
Once you pick your bands, select "9", Apply band configuration. Remember that the (*) means it's selected. Simply tap the ones you don't want and hit 9 to apply.
Works on my Samsung A71 5G
22nd June 2020, 11:02 AM |#16  
Junior Member
Thanks Meter: 0
Originally Posted by retiredinsaline

You don't need to do anything with the files.
Once you pick your bands, select "9", Apply band configuration. Remember that the (*) means it's selected. Simply tap the ones you don't want and hit 9 to apply.
Works on my Samsung A71 5G

How do I pick the bands when I cant open the menu for bands .please explain more
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