i am using airtel wright know
so which modem firmware i can use?

normally you can just use the generic one

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sir , i am facing data connection problem
1, cm data apn
2, cm radio
root@swi-mdm9x28-wp:~# cm radio
Power: ON
Current Network Operator: airtel
Current RAT: LTE network (LE_MRC_RAT_LTE)
Status: Registered, home network (LE_MRC_REG_HOME)
Signal: Very strong signal strength (5)
PS: Packet Switched Registered, home network (LE_MRC_REG_HOME)

3, cm data connect

i follwed these steps is it correct

root@swi-mdm9x28-wp:~# cm data connect
Setting up profile 1
Connecting … ok
Checking if device ‘rmnet_data0’ is up … ok
Routing inet … ok
Routing inet6 … ok
Updating /etc/resolv.conf … ok
Updating /etc/resolv.conf … ok
Updating /etc/resolv.conf … ok
Updating /etc/resolv.conf … ok
Testing connection … failed

you can use “cm data connect &”, there is no need to care about the test connection:

sir ,but it is not connecting what should i do , i have tested through
by ping for some time it will be on and again it will get disconnected

it automatically disconnecting from internet , every time i need to “cm data connect”

how often do you observe this?

You can open a terminal in AT command port, enable +CGREG notification by AT+CGREG=1, and see if there is any detachment from network.

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