It is a case by case basis that depends on your situation. Every appointment allocated is the earliest one available at the time of order. If you already have an existing NBN service and are transferring from your old provider to Hello Broadband, this can be ready to use within 1-2 business days.
If you need to have an installation for an NTD (network termination device), wall plate or antenna, this usually takes around 2 weeks. This depends on the attending nbn Co. third party technician’s schedule and when they are next available.