Hi @lowlanda,   The modem we provide is not locked to our network.  We have tailored the supplied NBN modem/router 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. The TPG supplied NBN modem/router is free whether you're not lock in or lock-in with 18 months contract. For more details about the upfront charges you may visit https://www.tpg.com.au/nbn. Let me know should you require further assistance.     ... View more