The cost of sending a text, making and receiving calls and using data is capped in the EU, but many holidaymakers aren't sure which countries are in the European Union, which could leave them facing hefty mobile phone bills.
Over half a million O2 and BE broadband (part of O2) and home phone customers officially became Sky customers on 1 May, so MoneySavingExpert.com breaks down what this really means for you.
Silent and abandoned phone calls about payment protection insurance (PPI) are being investigated by telecoms watchdog Ofcom, which says consumers who get unwanted calls are getting around two each week.
Angry T-Mobile users hit by price hikes are launching a fight to escape their contracts penalty-free, citing a mix-up by the mobile giant. However, regulator Ofcom has put a dampener on the idea.
Primus has been forced to delay increasing line rental charges for some of its customers, after it emerged they hadn't been told of a £1.20/month hike.