Repeated calls from this number, identified as o2 sales, have been persistent, despite polite declines, and have led to the decision not to renew the contract.
O2 upgrade calls – should you answer?
Summary — +443303035320
Caller Name: O2
Caller Type: Telemarketing
Location: United Kingdom
Reviews: 79
Carrier: —, Region: —
Expert Opinion
Beware of persistent calls claiming to be from O2. Many users report the same number repeatedly offering upgrades or tariff changes, often without confirming the caller’s identity. These calls can feel aggressive and may be part of a third‑party marketing operation rather than the genuine network. If you receive such a call, hang up and verify directly with O2 using an official contact number. Register the number on the Do Not Call list, block it on your handset and report suspicious activity to your provider. Avoid sharing personal details until you’re certain the call is legitimate.
Caller Categories
Caller Names
Details
Location: United Kingdom
Number type: ratings.phone_number_type_list.9
Rate this number — +443303035320
Recent Reports for 0330 303 5320
Mobile network provider
In my opinion, the criticism of O2 sales calls is unwarranted, as they are simply doing their job, and a polite decline is all that is required to terminate the call
443303035320
Unknown
The demeanor of the individuals calling from this number seems aggressive, and it's advisable to remain calm when interacting with them.
It's clear that O2 needs to take a hint and stop calling, as I'm capable of finding my own upgrades and services if needed, and people who express frustration with persistent cold calls are simply ordinary individuals who have had enough.
Repeated calls suggest this is likely the O2 sales team, highlighting their knowledge of online activity.
Receiving constant calls from this number, allegedly from O2, attempting to persuade me to upgrade, I've repeatedly declined, but they persist, prompting me to consider cancelling my contract and switching providers if the calls continue.
I checked with o2 and this number is apparantly for their marketing team, they are very persistant though
Persistent calls from O2 have led me to block the number to avoid further harassment.
In my opinion, this is a legitimate O2 line, offering upgrades and other services
I've received multiple calls from this number, with the first caller claiming to be from O2, and despite asking them not to call back, they continued to contact me, with the most recent call being from someone who also claimed to be from O2.
443303035320
Unknown
Blocked the caller after multiple calls
443303035320
Unknown
I'm tired of receiving calls from these annoying individuals
443303035320
Silent Call
Silence on the line
443303035320
Harassment Call
This number has been blocked by me
I've checked with o2 oficially and they've confirmed that this number is legit, it's not dangerus or anything, just a bit of a nuisance if your not looking to upgrade or somthing
443303035320
Scam
Multiple calls have been received from this number over the past few days, which, due to their potential fraudulent nature, have gone unanswered.
443303035320
Scam
Initially, the call was answered, but the caller remained silent before hanging up; subsequent calls have been ignored to avoid further frustration.
They claim to be from O2, but sound's fishy
443303035320
Scam
My phone flagged this number as potential fraud, so I'm not answering it and warn others not to either
Following a call from this number, I verified their claim of being from O2 upgrades with the company directly, only to discover that although they may be an approved third party, they failed to disclose this information, which has led me to distrust them.
Weekly calls claiming to be from o2 upgrades. My phone app identifies the caller.
Persistent calls from this number, but I never answered. Based on previous comments, it seems linked to an O2 mailing list. Best to avoid!
443303035320
Harassment Call
Number is blocked now.
443303035320
Scam
Chose to ignore it as they call daily, which is incredibly frustrating.
443303035320
Harassment Call
This number has been blocked by me
443303035320
Unknown
Repeated calls during work hours prompted me to ignore the number initially, but the persistence led me to block it eventually.
It seems to be O2. I’ll contact them myself if I’m interested in upgrading. I’ve already blocked the number.
Supposedly from O2. Best to ignore or block.
Got a call today from someone who said they were O2. They asked what device I was using. I told them if they were really from O2, they'd already know since I bought my phone from them and have an account. Ended the conversation.
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