NR5103E Flashed wrong firmware = bricked ?

Yayabociana

hi all

I bought 5g router NR5103E and accidentally flashed V4.19(ABYC.3)C0 firmware made for NR5103

I bought it second hand so there’s no way I will get support from network provider Is there a way to restore right firmware and get it back to life ?

For now I’m able only to access setting via LAN. Wi-Fi is on but is not working cellular works as expected

I had idea to flash back right firmware but I’m unable to find files online. ( I have no backup to restore )

thanks

Friday

Hi @Yayabociana ,

Please check the inbox message, thanks!

Friday

Hi @Yayabociana ,

Please check the inbox message, it's checking the S/N ans see how can we help from here.

thank you !

935341417

https://community.zyxel.com/en/discussion/comment/53981#Comment_53981

salah

I also faced the same problem can anyone help me

Sasha

I also faced the same problem can anyone help me

salah

hi all 

I bought 5g router NR5103E and accidentally flashed V4.19(ABYC.3)C0 firmware made for NR5103 

I bought it second hand so there’s no way I will get support from network provider Is there a way to restore right firmware and get it back to life ? 

For now I’m able only to access setting via LAN. Wi-Fi is on but is not working cellular works as expected 

I had idea to flash back right firmware but I’m unable to find files online. ( I have no backup to restore ) 

Can you help me

PaNi

Did anyone have a solution for this? I'm in the same pityful situation. :-(

kristowyn

https://community.zyxel.com/en/discussion/17628/nr5103e-flashed-wrong-firmware-bricked

Hi everyone,

I wanted to share my findings after accidentally flashing the wrong firmware onto my NR5103E, as it may be useful for others in a similar situation.

My device is a Three UK branded NR5103E (serial: S230Z12028890) which was running ISP firmware V1.00(ACDJ.2)b1_E0 (Three Sweden variant). I was experiencing a hard cap of ~312 Mbps on ethernet despite the router providing 600+ Mbps over WiFi and having a 1 Gbps physical ethernet link. The cause was the ISP firmware locking the router to Router mode only, with NAT processing bottlenecking all ethernet traffic.

I accidentally flashed V4.19(ABYC.5)C0 (NR5103 firmware, not NR5103E) onto the device. Here is what happened:

• WiFi: No longer broadcasting — the SSID does not appear, even though the setting shows as enabled in the GUI
• Cellular: Fully working
• LAN/Ethernet: Fully working
• Ethernet speeds: Increased from ~312 Mbps to 677-732 Mbps
• Cellular IP Passthrough: Now available and functional
• T-Mobile Poland WAN IP: Public IP assigned (100.x.x.x), not CGNAT

The most significant finding is the ethernet speed improvement — the wrong firmware actually removes the NAT bottleneck that the ISP firmware imposes, resulting in more than double the wired throughput.

I have since posted a separate thread requesting the correct NR5103E firmware to restore WiFi functionality. In the meantime the router is fully usable for my purposes as I only need ethernet and cellular.

Hope this helps someone!