
Step 1: Bootloader installation (Step 1 folder)
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• The bootloader update is required prior to installing the GNSS firmware (located in Step 2 folder), as some older versions are not compatible.  

• Bootloader update is not recommended for remote installation.

• The included B125 bootloader firmware is the same as the one that was included with 5.6.2 GNSS Firmware
	

Step 2: GNSS Firmware installation (Step 2 folder)
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• If installed boot version is incompatible or unrecognized, GNSS firmware will not update and the receiver will reset.  Storage media update log will contain "This firmware cannot be installed on this receiver, please contact support”.

• If incompatibility with bootloader exists, please contact your dealer or customer support for further instructions.