As part of its Uncarrier repositioning, T-Mobile is launching into the banking business with a pre-paid debit card and banking app. But if people aren't willing to trust banks with their cash, why should they trust a telecoms provider?

T-Mobile is no stranger to shaking up the mobile market - in the US its brand identity is moulded around being an unconventional 'un-carrier'. Now it's testing a service that lets people unlock their phones from the T-Mobile network with a single button push.

Contemporary consumers increasingly distrust huge 'faceless' companies. Enter the 'challenger brand': a Robin Hood figure who may not offer the biggest or best, but takes care of their customers and thinks outside the box.

Nearly 80% of teens in the US have a mobile, but their parents have no control over who they're texting or how much time they are spending on Facebook. Virgin Mobile Custom lets parents monitor and control how kids use their phone, but does it signal the end of net neutrality?