Why have I received an Optus bill after just 4 days?

[Naomiboyle]

Just got onto my plan and changed from my parents 4 days ago and I already have a bill?
Why am I already getting billed when I haven’t even used anything?

[Yeldarb · Accepted solution]

Have a read of the link below.

https://yescrowd.optus.com.au/t5/Blog/Pro-rata-and-Month-in-advance-charges-explained-Optus-billing/...