RM551E-GL : Lost 5G NSA (ENDC) in France after firmware flash

IoT Modules 5G Module
1

Hello Quectel Team,
I am using an RM551E-GL module in France on the SFR network (Band 20 + Band 78 NSA). Initially, 5G NSA was working perfectly. However, after reflashing the firmware to version RM551EGL00AAR02A02M8G, I completely lost 5G NSA. The module stays stuck on LTE (Servingcell shows NOCONN for NR5G).
It seems the ENDC combinations for France (SFR) were erased, or I am missing the correct QCN / MBN file for Europe.
Could an engineer please provide me with the correct QCN calibration file or the NV items needed to restore European ENDC combinations? Thank you!

2

Dear @jgalode
What is your original firmware? R01 baseline. Do you try to start data transmission? And check whether NR5G was attached.
Each module has corresponding QCN calibration file.

3

hi,

Firmware Version
RM551EGL00AAR01A04M8G

Build Date
Jun 25 2025

I ended up not finding a solution myself by grabbing a compatible xqcn file from the internet and installing custom iamromulan firmware.

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brave_RnpClxgCdv1920×1080 180 KB

thank you anyway for your response.