Ofcom has published the fourth edition of its quarterly UK telecoms complaints data. The report covers the final three months of 2011.

As with previous periods, overall mobile complaint levels were much lower than for fixed-line telephones and fixed broadband services. For the Q4 2011 period, Ofcom received the fewest complaints about O2 and the most complaints about Orange.

Mark Bridge writes:

Mobile financial services were making the headlines yet again last week. Not once. Not twice. No, we noticed at least three separate (and all pretty big) stories to talk about.

First came Nokia’s planned withdrawal from its mobile money service, which will leave around a million people in India looking for a new mobile wallet.

In today’s edition of The Fonecast we’re taking our regular look at all the top mobile industry news stories from the past seven days.

There’s talk about the new Apple iPad, a discussion about Everything Everywhere’s plans for 4G UK coverage, a look at the new Google Play service... and much more.

Ofcom says Everything Everywhere’s proposal to use its existing 1800MHz GSM spectrum to deliver 4G services in the UK is likely to benefit consumers without causing competition to become distorted.

As a result, it’s proposing to give the go-ahead to Everything Everywhere after a four week consultation period.

Ofcom is calling on the UK mobile industry to address the problem of consumers receiving unexpectedly high bills. It follows recent research that suggested 1.4 million mobile phone ‘contract’ customers may have been affected by ‘bill shock’ in the past six months.

The regulator says it may introduce new rules if mobile networks don’t tackle the problem.