How can I check my balance on o2 Pay Monthly on a Sony Ericsson phone?

Question

i have tried pressing *#10# but it just says network problem.

Answer 1

ooohhh i have a sony ericsson phone too. i love it, got no clue about your question though sorry

Answer 2

I'm on O2 Pay & Go and the code for checking my balance is: *#10#

Try typing that and pressing 'call', see what happens. At worst nothing will happen, you won't get charged.

Answer 3

You should send a blank text (a text with no message) to 21202.  After a short wait you will receive a text telling you how much of your allowance you have left.