Nokia 6 build number 00ww_3_700_sp01 in Australia, not received any FOTA updates since November 6
A bit more verbose description would not hurt anyone.
Are you just waiting the notification about new update or have you tried to check availability manually from Setup/About Phone/System Update?
What did they say to you at the shop where you purchased the phone?
How did the Australian service point: http://customercarecontacts.com/nokia-australia-contact-customer-service/ reply you you?
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