o2: Login does not work - this may be the reason

If the login to o2 does not work, various errors can be responsible. Read in this practical tip what you can do about it.

Login to O2 does not work - what to do?

• First, make sure that you have entered the correct mobile number.
• You should also make sure that you have entered the corresponding password correctly.
• In order for the login for your mobile phone contract to work, you have to register on this page.
• If you have forgotten your password, you can restore it using the link.
• Your account may also be blocked due to late payments or a violation.
• If you have any further questions, please contact o2 customer service.

You can find out how to submit a complaint to o2 in our next practical tip.