Reported the number to Vodafone - is definitely not theirs. Most certainly a phishing attempt
UNDER NO CIRCUMSTANCE GIVE THEM YOUR DETAILS!!!
You're warned...

Look she could work 4 Vodafone who knows as U always have 2 give password when speaking with Vodafone but she changed from I'm doing a sales report 2 asking who my mobile provider is and talks fast like telemarketers do. When I said I just spoke to Vodafone this morning my mobile provider this morning she told me I am missing out on savings and she will be in touch not no more she won't. How can she possibly know that I am missing out on savings if she can't see my account plus I am on a 2 year plan she wouldn't be able to anyway. She is a telemarketer tried calling 5 times previous real Vodafone provider would leave a message.

I missed the Call.
Tried to return the call,
And it just beeps 3 times.
Not a real number.
P.s. I am not a Vodaphone customer like others who have complained about this number.

Constant calls from this number past 2 - 3 days ...guess they're at it again!

Missed to calls from this number now , call them back and get nothing , not worth the time of day 👍

I called back number (02) 4007 5110 reached a voice mail box which is full and no option to leave a message.

I called back number (02) 4007 5110 it says the extension I have reached is not available and no option to leave a message.

(02) 4007 5110 - called and routed to a busy tone after four rings.

Claims to be from Vodaphone and asks for pin and account details - definite scam