How to fix network fluctuation and low internet speed [tested] - Xiaomi Mi A1 Guides, News, & Discussion

Hii Guys
Why?
"i brought a second hand mi a1 and when i inserted my sim cards in it and used it for two days, i was able to notice that indoor network is not sufficient (only one or two bars) and very much network fluctuations are there, While my Other phone with same sim cards is having 4 bars of network Then i have done some research about LTE Bands And Fixed it"
This Worked Me For AIRTEL & JIO
What i Have Done?
1. Enabled the LTE Band 8 ( which was disabled by default)
2. Disabled the LTE Band 40 & 41
LTE Band 8 is Used By Network providers for indoor network ( Like Airtel and Jio in India)
After This My Internet Speed Is Increased indoor and Outdoor also Not any Issue And Network Fluctuations are Fixed Completely :laugh:
So i Am Sharing This Step by Step Guide :
Requirements:
1. Mi A1
2. Data Cable
3. PC/Laptop With QPST And QXDM Latest Version Installed (Links Below)
Step 1. Connect Your Phone With PC in Diagnostic Mode
To Enter Diagnostic Mode:
Rooted Devices
Adb Commands
Code:
adb shell
su
setprop sys.usb.config diag,adb
Non Rooted
Dial *#*#717717#*#* ( Not Worked For me )
Step 2. Open QXDM Professional And Select Communications From Tools Menu-
(You Will be able to see your device if it is connected properly)
Select Your Device Port And Press OK
Step 3. Select NV Browser in First Dropdown Menu And LTE in Second Dropdown
Now You Will See A File " LTE_BC_CONFIG" Select it And Press READ button
A value will be displayed in Lowe Half Double Click on it and Copy it and save in a notepad
Step 4. Enter 148 Instead of That Value and Press Write Button
Step 5. Restart Your Phone And Enjoy ! :good:
( Restore Original Copied Value or Use LTE Band Calculator For Restoring Fectory Settings)
I will try to Provide links But You can Also Download QPST,QXDM and Qualcomm Drivers Manually By Searching Easily Available on Internet :silly:
Sorry Unable to Post links Because this is my first Thread

Didn't know airtel/jio uses band 8.
Anyway, in my area network seems stable enough. Also 4g+ working fine with band 40+40(Airtel).
Thanks anyway for info.

.:Addicted:. said:
Didn't know airtel/jio uses band 8.
Anyway, in my area network seems stable enough. Also 4g+ working fine with band 40+40(Airtel).
Thanks anyway for info.
Click to expand...
Click to collapse
In My Area (PUNJAB) There are So many Network Fluctuations Only In Mi a1 After Pie Updates

Related

Galaxy S5 LTE will not connect. This Fix worked for me

I followed the instructions like another thread comment said to do but for some reason I couldn't get it to work still but after playing around I was able to get it working.
---- Instructions for enabling: (thanks eyecon82) ----
1. dial ##3282#
2. then click edit (need MSL code) (I used SPCUtility.apk as nothing else worked on my S5)
3. then click LTE
4. It will show LTE ( also known as Band 25), Band 3, Band 26, Band 41 ( I unchecked marked all of these but the LTE option leave that check marked to on)
5. Disable all bands leave LTE check mark to say on.
6. Go to the main directory by hitting back key and choose More at the bottom
7. Choose HDR/1X Selection and choose LTE only Mode. Click OK to save
8. You can either reboot or I just turn on airplane mode and turn it back off to reset the connection.
9. LTE should be working like mine did. But you will not get phone calls until you turn back on the HDR/1X Selection to LTE + CDMA +EVDO Mode but you will get text messages fine.
The items that are underlined in Red are the stuff i added.
---- To tell what Band on: ----
1. ##debug#
2. enter passcode 777468
3. go to LTE engineering menu
I hope this helps because all the other stuff I read would not work for my Galaxy S5 I just bought.
Thanks

[Q] Need Help regarding Network Mode Issues on LG G3 AT&T

Dear All,
I am having issue of Network selection on my LG G3 D850.
1st of All sorry for my English.
Intro of Phone
Phone is rooted and Lollipop stock rom installed.
My Network is Zong (Pakistan) Frequencies are following
3G = 2100
4G = 1800
Issues
At start Network mode setting was not available under mobile network but now after changing ro.build.target_operator ATT to OPEN i got these setting in Network menu but now.
1. 3G not working in this cell phone my network frequency is 2100 and this cell phone also support this but why this is not working,
I have tried to check and change WCDMA mode it is showing 850 as selected but when i try to select the 2100 message show Fail.
2. Not switch automatically to LTE/4G (but some time after restart), when i select LTE/4G by selecting Manually LTE/4G network from manual searched Network list or after restart, Cell Phone unable to receive any phone call, caller receive message like cell phone switched or unable to reach or out of coverage etc,
3. when i dial *#*#4636#*#* after opening the Menu and selecting the Phone Information this application show message "this application dose not work on this device" and it close this menu.
No issue on 2G.
I also have tried Intelli3G but it was not working on KK or i dont know how to use it now i have LP I am not able to install Xposed i have installed the different version but not working i also flash a zip file which was working on Xperia Z1 but my Cell phone Rom got issues (All time message show LGSmartwatch (or something like that) stop working), so i again install LP on device.
I am New user of LG G3. please guide me
@wajeeh.ihi dial 3845#*855# on ur phone then select lte only then select modem settings then RAT SELECTION Then choose the 1st option which has lte auto in the end. Ull have to do this everytime u restart your phone to use 4g lte.
Hello wajeeh. need your help in editing that buildprop file. I managed to do it on stock lollipop rom but now i forgot.. Can you please help me out .
Thank you

[GUIDE] Set 4g/3g only mode (Single sim/Dual sim) (Unrooted/Rooted)

Hello,
Jellybean and below versions of Android have 2g/3g/4g only mode in the network settings only so this guide is basically for KitKat and above versions.
With KitKat and above versions the network settings are changed to "Preferred Network Type" and then 3 options (2 depending on the phone) are shown viz 4g (LTE),3g (Wcdma),2g (Gsm).
This means that when a user selects 4g in preferred network type and once he is in a low 4g coverage zone the phone keeps fluctuating between 4g and 3g/2g.This might result in an unpleasant internet experience.
So it is necessary to keep the phone in a single network mode to use a stable network connection -> This is true especially in countries like India where there is patchy 4g and 3g coverage.
DISCLAIMER:- The below mentioned steps for unrooted phones are completely safe and no harm may occur if followed correctly.
Rooting your phone may void the warranty and some hacks (such as xposed framework) may not be supported on your ROM (phone). Please read the respective threads for rooting,xposed framework,gravity box which are available on xda before installing them.
SINGLE SIM MOBILE :-
[A]- (unrooted) It's pretty easy. Just dial *#*#4636#*#* in your dailer and then select
'Phone Information' and then select LTE only ( or WCDMA ) in the drop down menu above "Turn off Radio".
- (unrooted) Use an app like 'Phone Testing' by diewland instead of dailing the code.
[C] - (rooted) If [A] and don't yield the desired result, then you must root your phone then install xposed framework and then install gravity box.
DUAL SIM MOBILE:-
SIM 1 :- For sim 1 follow the same steps [A] or or [C] which are mentioned above for single sim mobile.
SIM 2:- For sim 2, first disable SIM 1 in " Dual sim settings " and then follow steps [A] or or [C] .
Once your done then re-enable sim 1 . The sim 2 will continue to remain in whatever mode you selected.
PS 1 :- Although it can be argued that a simple sim swap will do (in dual sim phones) , this is faster than a sim swap.
PS 2 :- You have to perform these steps after every reboot. There is no way (not yet discovered) so that these settings aren't overridden after a reboot.
PS 3 :- Though there are numerous posts on xda, guides /videos on the internet which explain the exact same thing but I couldn't find any post/guide/video on the internet which explains these settings on a dual sim phone which doesn't require a sim swap.
Thank you.
this works on both single and dual sim and the settings will "stick" after reboot... requires root
https://forum.xda-developers.com/galaxy-s4-sprint/general/how-to-fix-network-signal-gsm-sim-t3720534

How to:- Enable LTE+ on SD617 based Moto G4 Plus

As we know here https://www.qualcomm.com/products/snapdragon/processors/617 , Moto G4 SOC supports 2CA of different LTE band combinations. We were able to enable band 41, band 20 and band 28 using QXDM until the December update. The DEC update seems to lock the modem to the OEM based LTE bands so the new bands cannot be added on the latest firmware.
Motorola has not provided systemUI support on stock firmware for LTE+.
Requirements:-
1. A PC with Motorola drivers
2. Stock firmware rooted/unrooted Moto G4/plus
3. QXDM software (Search on google it is available everywhere)
4. QPST software (maybe needed to map COM ports)
5. Any custom ROM 8.1 after the above process
Note 1:- Please take a backup of NV (QCN) that contains the IMEI via QPST software. It hardly takes few minutes. So there is no risk of 'baseband unknown' or loss of signals.
Process:-
1. With no SIM cards in any slots and airplane mode ON, boot the phone into BP Tools from bootloader menu.
2. Connect the phone to PC and map the correct Motorola Diag port no xx
3. Open QXDM and go to communication and click to the COM port
4. Select NV browser and enter spc 000000 in the command line
5. Go to RF LTE from the category filter on the right side.
6. Scroll down till item number 70975
7. Read item number 70977 RFNV LTE B3 CA BC CONFIG and write 20 in the field below. ( 20 = 2CA band3 + band5)
8. Move on to 70979 RFNV LTE B5 CA BC CONFIG and write 549755813904 in the field below. ( 549755813904 = 2CA band5 + band 40)
9. Continue to 71014 RFNV LTE B40 CA BC CONFIG and write 549755813892 in the field below. ( 549755813892 = 2CA band40 + band 3)
10. Install QPST and select efs explorer, enter SPC 000000. Go to item_files>modem>lte>common. Delete the file ca_disable and copy new ca_disable after unzipping ca_disable.zip from here. (the original file has CA disable=YES which is deleted in my attached file)
11. Power off the phone, disconnect the cable, insert sim card (JIO) and turn off airplane mode.
12. There is no sign of LTE+ in stock firmware except slight improvement in data speeds.
13. Install custom ROM 8.1 ( I installed AICP athene 8.1 20180310)
I am receiving LTE+ signals whenever the phone latches to band3 and band 5. There is no LTE+ in band 40 in my location currently.
Since the modem firmware and FSG isnt ideally configured for 2CA, we are not able to see secondary carrier signal or sec antenna in Network Signal Guru but I am getting speeds above 85 MBps while latching to the above bands.
Note 2:- I take no responsibility for whatever happens to your device, PC or anything. This guide is for enthusiasts who are willing to take little risk. Do not write 3CA values anything other than the values written above because the SD617 SOC supports 2CA only and not 3CA, not 3+5+40.
Similar threads:-
https://forum.xda-developers.com/lenovo-p2/how-to/enabled-4g-ca-p2-t3707584
https://zukfans.eu/community/threads/enable-carrier-aggregation-lte-a-on-zuk-z2-qualcomm-phone.7388/
In my experience, when I "unlocked" the LTE band 20 on my US XT1644, it was still not in use in that area, dropping back to 3G. I assume that's because the actual RF amplifier head-end is not present, even if the chipset was tricked to "support" it.
SoNic67 said:
In my experience, when I "unlocked" the LTE band 20 on my US XT1644, it was still not in use in that area, dropping back to 3G. I assume that's because the actual RF amplifier head-end is not present, even if the chipset was tricked to "support" it.
Click to expand...
Click to collapse
You can verify band 20 RF capabilities in RFNV LTE B20 CHAN in RF LTE section using qxdm.
For LTE 20 I have re-calculated and changed only the value of:
06828 LTE BC Config LTE_BC_CONFIG_type.lte.config
But after that. it just didn't actually pick up the LTE band 20 (in an area where a native EU GSM phone was), so some hardware piece is missing for the 800MHz frequency in the US version. I assume that's the same for modifying a non-US with US bands too.
Now, about the CA... I am on a Verizon Wireless MVNO, so I blamed that for not having CA (I still get 60-68Mbps DL speeds). The LTE bands for VZW would be 2, 4, 13
In EU I have native SIM (Vodafone) and I get 40-60Mbps too...
Checked right now - the US version (XT1644) doesn't have items with ID higher than 65673. So none of those "LTE CA" appear.
Changing the LTE item that adds bands seems to be still working - the changed value remains after reboot.
QPST identify device as no phone.also command line is greyed out and nothing can be entered.? Any help.!
kidjohny said:
QPST identify device as no phone.also command line is greyed out and nothing can be entered.? Any help.!
Click to expand...
Click to collapse
Identify the com port from the PC Device manager. With QPST configuration opened, select any one com port from the device manager. One like Motorola BP USB com port, Mot qc diag port and Motorola AP com port. The device identity like ESN number should be visible in QPST configuration.
SoNic67 said:
For LTE 20 I have re-calculated and changed only the value of:
06828 LTE BC Config LTE_BC_CONFIG_type.lte.config
But after that. it just didn't actually pick up the LTE band 20 (in an area where a native EU GSM phone was), so some hardware piece is missing for the 800MHz frequency in the US version. I assume that's the same for modifying a non-US with US bands too.
Now, about the CA... I am on a Verizon Wireless MVNO, so I blamed that for not having CA (I still get 60-68Mbps DL speeds). The LTE bands for VZW would be 2, 4, 13
In EU I have native SIM (Vodafone) and I get 40-60Mbps too...
Click to expand...
Click to collapse
Band x CA list is in RF LTE menu not near items 65xxxx or 6828/6829
dr.faramroze said:
Identify the com port from the PC Device manager. With QPST configuration opened, select any one com port from the device manager. One like Motorola BP USB com port, Mot qc diag port and Motorola AP com port. The device identity like ESN number should be visible in QPST configuration.
Click to expand...
Click to collapse
It's OK now..but no RF LTE option..in category field.
dr.faramroze said:
Band x CA list is in RF LTE menu not near items 65xxxx or 6828/6829
Click to expand...
Click to collapse
There is no "RF LTE" category.
Also, that category would not matter at all as long as you have the actual ID number of the NV location (70975 in your example). As I said, the XT1644 that I have doesn't go higher than location number 65673.
Can u specify the diag driver u used.Where can I get that.?
In your screenshot qxdm identify it as msm8926.But in mine it shows 4110.could that be a problem.?
You are using an older version of QXDM that's why there is no RF LTE menu. Please use the following latest tools.
https://drive.google.com/file/d/0Bw01zu5q0Cg-aFFEbFU4ZE85cEU/edit
https://www.4shared.com/zip/YGncBw36ce/QXDMWIN314_Installer-011443.html
https://www.4shared.com/rar/zS1_Gczdei/QXDMWIN31411741U.html#
https://www.4shared.com/rar/irXxwa_Gca/QXDMWIN40001241U.html
https://www.4shared.com/rar/xYg-VTi3ei/QDARTWIN48000393F.html
https://www.4shared.com/rar/QpBdFX9Kei/QPST_27460.html
Install version 594 for unlimited access https://drive.google.com/file/d/0B4ciwAYRi6hXUy1mU19UVlJ5OEU/view
when i try to boot into bp tools, it just boots into android instead
BP Tools mode is diag Com port mode in android OS booting system. It is normal android with serial port.
dr.faramroze said:
You are using an older version of QXDM that's why there is no RF LTE menu. Please use the following latest tools.
https://www.4shared.com/rar/zS1_Gczdei/QXDMWIN31411741U.html#
https://www.4shared.com/rar/irXxwa_Gca/QXDMWIN40001241U.html
https://www.4shared.com/rar/xYg-VTi3ei/QDARTWIN48000393F.html
https://www.4shared.com/rar/QpBdFX9Kei/QPST_27460.html
Click to expand...
Click to collapse
Great. Thanks....its all working fine now.able to get LTE+.But no big difference in speed here in my area..!...also u missed the starting location to find ca_disable file.item_files is under nm(or nvm or nv..something like that.) folder.Have a Gud Day.Appreciate ur work.
dr.faramroze said:
You are using an older version of QXDM that's why there is no RF LTE menu. Please use the following latest tools.
Click to expand...
Click to collapse
The newer download in the first post was corrupted, I will try yours when I get at my PC in a couple of days (I am traveling now).
SoNic67 said:
The newer download in the first post was corrupted, I will try yours when I get at my PC in a couple of days (I am traveling now).
Click to expand...
Click to collapse
There are many versions of QXDM now in my thread above. Make sure you use atleast 594.
For those who want to tinker with additional LTE bands. Here are the stock values of Moto G4/plus.
MOTO G4 PLUS
441= 0xFFFF
946= 0x3FFF
1877= 562950027346304
2954= 4294967295
4548= 562950024724480
6828= 549755814037
6829= item inactive
65633= 0x0000008000000091
Always make a .qcn backup in QPST>software download>backup. Fastboot flash modem nonhlos will also restore original values and loss of signal. Let me know if anyone is able to achieve additional bands like band 41, band 20, band 28 etc. It will be seen by Network Signal Guru.
dr.faramroze said:
For those who want to tinker with additional LTE bands. Here are the stock values of Moto G4/plus.
MOTO G4 PLUS
441= 0xFFFF
946= 0x3FFF
1877= 562950027346304
2954= 4294967295
4548= 562950024724480
6828= 549755814037
6829= item inactive
65633= 0x0000008000000091
Always make a .qcn backup in QPST>software download>backup. Fastboot flash modem nonhlos will also restore original values and loss of signal. Let me know if anyone is able to achieve additional bands like band 41, band 20, band 28 etc. It will be seen by Network Signal Guru.
Click to expand...
Click to collapse
Careful, the LTE bands and numbers are different for different markets! US bands are different from EU and Indian models.
I have tried the new software. On the US version, at those fields, I get "NV Status Error Received: No such file or directory"

Force LTE / 4G Only On Samsung Galaxy J7 Pro , Prime, max etc

these tips and tricks is works on other type of samsung galaxy series
please follow these steps :
1. You must be Using SIM 1 as Mobile data internet connection
2. Download and Install the MTK Engineer App" on google playstore;
3. RUN the App that you have installed above
4. those are 3 menu : 1. MTK Engineer MOde ( for Chipset Mediatek ) ; 2. Android Testing ; 3. LTE Switcher . We shouls choosing the third menu ( LTE Switcher ). You will go to Phone info user interface
5. in the phone info . choosing the LTE only at set preferred network section.
For more detail information , video tutorial and Screenshot please go to How To Lock 4G Only or LTE Only On SAMSUNG
Not Working
Hi,
I DLed the MTK Eng App. I go to the LTE Switcher page and select LTE or LTE/WCDMA (or any setting actually). After I exit the page and come back it reverts to WCDMA Prefered.
I am definitely in an LTE covered area (I know because my wife's J5 is connected to LTE).
Any ideas? TIA!
you need to setting SIM 1 as mobile data defaults. it will work with no get back to lte wcdma preferred.
richb01 said:
Hi,
I DLed the MTK Eng App. I go to the LTE Switcher page and select LTE or LTE/WCDMA (or any setting actually). After I exit the page and come back it reverts to WCDMA Prefered.
I am definitely in an LTE covered area (I know because my wife's J5 is connected to LTE).
Any ideas? TIA!
Click to expand...
Click to collapse
you need to settiing SIM 1 as mobile data default.

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