Unknown Number

[RJK]

I have a number & I'm having trouble because I don't know if it's O2 or not, the number is: 08009524854

[jonsie · Accepted solution]

If in any doubt, don't give them any details such as account numbers or access OTP codes

Call customer service if you want to upgrade

You need to call O2.

All numbers are in this guide

You can use Skype from your PC to call the free numbers if you have no phone available

Guide: Coronavirus Community Help and Support 

Advice from an O2 Guru regarding a way to get through:

When you call, you will be asked for the reason you are calling,

Stay silent for 15 seconds and you will be taken to the keypad options.

Press 2 for Everything Else

Press 5 for More Options

Press 7 for Anything Else which will put you though to an advisor.

Press Upgrade, Lost/Stolen or Fraud if you have to.

8am is the best time to call

[Bambino]

@RJK Follow the advice from @jonsie and only use the phone numbers in the link provided. If you receive a cold call from anyone, be it O2 or Buckingham Palace, never give out your personal or banking details. If you're being offered something that sounds too good to be true, it probably is.