T-Mobile introduced a whirlwind of changes last year as it rebranded itself as the "Un-carrier," with perhaps its most substantial shift being the decision to forgo annual contracts, breaking away from a long-standing practice among carriers in the US. Now the company is doing away with another perpetual mobile pain in the rear by eradicating its domestic overage charges. This applies regardless of whether you're on a Simple Choice plan, the new Simple Starter, or an older plan - and it will take place starting in May, with those bills arriving in June.
Starting in July 2014, Europeans will be free of burdensome roaming charges as they travel across the European Union's 27 member states. This comes after officials voted to terminate such fees for voice calls, text messages, and internet access as part of a move to create a single European telecoms market. This is great news for French citizens hopping across the border to Germany, but it will have no impact on tourists from outside of the continent.
In a word: yes. Wireless carriers in the US (Verizon, AT&T, Sprint, T-Mobile, etc.) have long been deeply opposed to net neutrality over their so-called "mobile broadband" networks, but today they've been given a power they have long desired to see the FCC put into writing.
If you haven't been following the net neutrality saga, you might want to find out what exactly "net neutrality" is, or what it means.