Hi @sonic,
Welcome to the community!
TPG had tailored the Huawei HG659 firmware to fit TPG's specifications for numerous reasons. Some of that reason involves quality of service and especially the security of VoIP, as this gives us a better opportunity to keep our customer's account and other credential safe and secured.
With this being said, we would like to extend our sincere apologies as we cannot provide that root password due to legal reasons.
Tell me should you require further assistance.
Cheers!
