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I have one TRB140 device. I downloaded the GPL code from website and I am able to build the firmware using Linux PC.
I have 2 questions here:
1. How do we install the built firmware into the device?
2. How do we install the built firmware in a new Quectel EC25 module? My understanding is that as TRB140 devices use Quectel EC20, it should be possible to install the firmware in the EC25 by following certain process. Hope, someone will be able to address the issue.

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1: the generated firmware is in bin/targets/mdm9x07/generic/tltFws, do an update from file,

2: the firmware is for the TRB140, not the Quectel modem itself.