If you’re moving overseas, keeping your U.S. number is critical for: But simply keeping a U.S. SIM card in your drawer won’t cut it. Most services will deactivate inactive SIMs within a few months. So ...

Tello is a U.S.-based mobile virtual network operator (MVNO) that runs on T-Mobile’s network. That means it uses T-Mobile’s infrastructure but offers much more flexible and affordable plans. It’s ...