o2 Phone -- U call 150 for T-Mobile. You call 333 for "3" what do you call for o2?

Question

It says it in the question.
I have had T-Mobile & 3 phones and I just recently got a o2 tariff. What do you ring in order to hear how much minutes and text messages you have? Like in T-Mobile you call 150. In "3" you call 333..

Answer 1

Call 4444 and then choose option 2 and then option 2 again.