Twitter says a security attack late last week managed to gain access to information about around 250,000 of its users. It appears the hackers gained access to usernames, email addresses and encrypted versions of passwords.

The service responded by resetting passwords for all affected accounts, which appeared to include many Twitter ‘early adopters’.

PhonepayPlus, the UK regulator of premium rate telephone services, says parents need to take control of their children’s smartphone bills and social media use - or face mobile phone bills that run into thousands of pounds.

The warning comes in a new report that highlights two areas of particular risk: free apps and social media linked to smartphones.

A new advertising campaign from the Metropolitan Police is warning people to appreciate the value of their possessions and to protect them from the risk of street robbery.

Radio advertisements and posters are reminding Londoners to protect mobile phones, tablets, jewellery and cash - although it’s phones that are the favourite target for thieves.

4.3 million home and business alarm systems will be connected to mobile phone networks in Europe by 2016, according to a new report from Berg Insight.

The research company predicts that the total number of tracking devices and wireless alarm systems monitored from a European alarm receiving centre will grow from 9.1 million last year to 39.7 million by the end of 2016.

This week's podcast includes news of two more UK virtual networks, Nokia's property deal, a break-up for ST-Ericsson and Huawei's new partnership with Three.

We also look at WiFi hotspots in London taxis, Ofcom's research into customer service, pre-loaded security software on Android smartphones and a man whose iPhone may have cost him a job.