GSM Baseband: Unknown

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3

2016-09-19 09:16

I am on Beta Build, Flyme 5.6.9.13 beta ROM, and my baseband is showing unknown and both the IMEI are showing "null"

Please guide how to restore the same.
I having the 5.1.3.2G ROM but not able to flash it, its prompting "The firmware is too old"