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Don’t pay any attention to the online me tracker. It’s pretty useless. Last year for my 7 Plus order the tracker stayed on number one a week after my phone had arrived!
My other advice would be to download the DPD app. My order last year showed up on that before I had any notification from Vodafone that it had been despatched
I find it amusing that Vodafone are the only network still stating a 3rd November delivery date for new orders when all other networks are saying 3 weeks or more for any variant of the X