I resolved my problem.
My modem is E3276s-150 in stick mode.
For correct modem works we need to change mode of this device to modem mode.
For do that we need put our Huawei E3276s-150 to the mikrotik or any computer USB port and then connect with them by serial port using terminal.
In example on routerboard when we put Huawei to the USB port and use winbox->New Terminal, we should check which port of the usb use our device:
/system resource usb print
(In my option that was usb1)
Next we need to use terminal. (Tip: When we got this message: "failure: port's channel is already in use" the we should disable ppp-outX interface i.e. /interface ppp-client disable ppp-out1 or just choose diferent channel fo terminal connect i.e. ) /system serial usb1 channel=1. Be sure you have disable automatic sms receive (/tool sms set receive-enabled=no) and you don't have run info on /interface...
So we run terminal:
/system serial usb1
Now we can check if we are properly connected by typing AT and confirm by ENTER. We should got feedback: OK
Now I suggest to check and save our actual configuration of modem typing AT^SETPORT? (I found the default is ^SETPORT:A1,A2;10,12,16,A1,A2):
Now we change mode to modem mode, typing:
Respone: ^SETPORT:A1,A2;10,12,13 (something like that)
I suggest to set forcing network operation by device to "first LTE when LTE isn't avilable then switch to 3G". We can check our actual configuration typing AT^SYSCFGEX?. Be careful with commas (two) on the end because they are important.
So we set forcing netwrok:
Respone: ^SYSCFGEX:"0302",3FFFFFFF,1,2,800C5,, (something like that)
Now we need to restart our modem. We can do that using command or just unplug and plug back modem to the usb port. This is command:
Now we can close console typing Ctrl+A next Q.
AT^SETPORT=? - show available modes
AT^SYSCFG=? - show available system mode, GW access sequence, band, roaming support and domain.
I'm a little surprised that information wasn't write on Mikrotik wiki (Manual:Peripherals) for Huawei E3276-150.
Based on websites:
https://superuser.com/questions/586049/ ... tl8CBkWM1o
https://papa-admin.ru/mikrotik/86-mikro ... 150-1.html
http://www.mariuszdybala.cba.pl/artykul ... e3276.html
https://vutlan.atlassian.net/wiki/space ... ms+setting
P.S My modem(E3276s-150) works on 951G-2HnD without any additional USB power hub. But I'm testing it for a short time so I don't sure about this in a future work.