@parad0x0 Sorry for the delay. My HGU is a MitraStar model GPT-2741GNAC-N1. How can I get this username and userid? How about this XML file? Thanks!

@parad0x0 Yes, I tried to convert the first 4 ascii to bytes to generate the GPON SN, but it did not work! I don't know about this XML file and the GPON User / GPON ID. Could you provido more info...

@parad0x0 I tried to set the GPON Serial Number and GPON Password from the ISP's router, but the connection did not work! I am suspecting the ONT make use of additional data (maybe Mac Address?) to...

@parad0x0 Thanks for sharing the new firmware and the steps for the hidden menu. However, I could not manage the TX-6610 to work with the ISP Vivo!! I have no idea what is wrong!

Hello @parad0x0, Could you please share the firmware that solved your problem? I am also from Brazil and my ISP is Vivo as well. Thanks!

@Sunshine It does not make sense! The firmware is delivered by TP-Link with the hardware. Hence, is TP-Link's responsability to release the latest firmware with all bug fixes and improvements!! Until...