starred/ZTE-MF286D

Fork 0

mirror of https://github.com/4IceG/ZTE-MF286D.git synced 2026-04-27 03:35:51 +03:00

[GH-ISSUE #19] band management problem #17

New issue

Open

opened 2026-03-13 14:16:09 +03:00 by kerem · 3 comments

kerem commented

2026-03-13 14:16:09 +03:00

Owner

Originally created by @vincenzodell55 on GitHub (Apr 25, 2025).
Original GitHub issue: https://github.com/4IceG/ZTE-MF286D/issues/19

Many times it happens that some bands are turned off on the BTS, especially at night because of power saving.
However, the router never searches for new bands.
So it happens that in the morning the router ends up with a single band (B7), while the others are available to be aggregated.

I also noticed this problem as the Internet connection does not work with the single B7 band.
The only solution was to remove Band 7 from the preferred bands, giving up performance.

To simulate the problem, I recorded a video where I selected among the preferred bands only band 7.
I confirm that band 7 works perfectly when aggregated by at least one other band.
The problem of no connection occurs exclusively when the other bands are turned off.

https://github.com/user-attachments/assets/61d9f0c0-4d9d-4850-a931-928f01282c9b

Originally created by @vincenzodell55 on GitHub (Apr 25, 2025). Original GitHub issue: https://github.com/4IceG/ZTE-MF286D/issues/19 Many times it happens that some bands are turned off on the BTS, especially at night because of power saving. However, the router never searches for new bands. So it happens that in the morning the router ends up with a single band (B7), while the others are available to be aggregated. I also noticed this problem as the Internet connection does not work with the single B7 band. The only solution was to remove Band 7 from the preferred bands, giving up performance. To simulate the problem, I recorded a video where I selected among the preferred bands only band 7. I confirm that band 7 works perfectly when aggregated by at least one other band. The problem of no connection occurs exclusively when the other bands are turned off. https://github.com/user-attachments/assets/61d9f0c0-4d9d-4850-a931-928f01282c9b

kerem commented

2026-03-13 14:16:15 +03:00

Author

Owner

@4IceG commented on GitHub (Apr 25, 2025):

You have no influence on the operator's behavior on the BTS.

I don't know if this will solve the problem, but try setting up a connection monitor and add command

#!/bin/sh

# Band B1 + B3 + B7
sms_tool -d /dev/ttyUSB1 at "AT+ZNLOCKBAND=1,0,45,0"

to user script. Set only B7 and check if aggregation returns.

@4IceG commented on GitHub (Apr 25, 2025): You have no influence on the operator's behavior on the BTS. I don't know if this will solve the problem, but try setting up a connection monitor and add command ``` #!/bin/sh # Band B1 + B3 + B7 sms_tool -d /dev/ttyUSB1 at "AT+ZNLOCKBAND=1,0,45,0" ``` to user script. Set only B7 and check if aggregation returns.

kerem commented

2026-03-13 14:16:20 +03:00

Author

Owner

@vincenzodell55 commented on GitHub (Apr 25, 2025):

I tried to do as you said but unfortunately the band 7 individually still does not work.

In addition, another malfunction occurred a few minutes ago. Every 4 hours my IP address changes because the operator offers me dynamic IPs.
It happened that the network stopped working completely. The QMI interface, that is responsible for finding the 4G signal, does not search for available networks and bands. For this reason I have to do a reboot every time.
I had left B1+B7+B3 as my favourite bands.

https://github.com/user-attachments/assets/cb8a7685-c19a-409a-a03f-5980f1e4636a

@vincenzodell55 commented on GitHub (Apr 25, 2025): I tried to do as you said but unfortunately the band 7 individually still does not work. In addition, another malfunction occurred a few minutes ago. Every 4 hours my IP address changes because the operator offers me dynamic IPs. It happened that the network stopped working completely. The QMI interface, that is responsible for finding the 4G signal, does not search for available networks and bands. For this reason I have to do a reboot every time. I had left B1+B7+B3 as my favourite bands. https://github.com/user-attachments/assets/cb8a7685-c19a-409a-a03f-5980f1e4636a

kerem commented

2026-03-13 14:16:25 +03:00

Author

Owner

@4IceG commented on GitHub (Apr 25, 2025):

Show me all settings of the connection monitor.

Another thing.. QMI returns message "Network device is not present" which confirms modemband, modem is not visible.
If it is not a problem with the power supply, you may have hardware problems (modem does not disappear by itself).

If this happens again, execute the command cat /sys/kernel/debug/usb/devices and check if the modem is visible on the USB bus.

@4IceG commented on GitHub (Apr 25, 2025): Show me all settings of the connection monitor. Another thing.. QMI returns message "Network device is not present" which confirms modemband, modem is not visible. If it is not a problem with the power supply, you may have hardware problems (modem does not disappear by itself). If this happens again, execute the command `cat /sys/kernel/debug/usb/devices` and check if the modem is visible on the USB bus.

No labels

No milestone

No project

No assignees

1 participant

Notifications

Due date

The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set.

Reference

starred/ZTE-MF286D#17

No description provided.

Rows
Columns