Lenovo vibe X3 The power and volume buttons are on the right, though a bit too low for our liking. There’s a Hybrid SIM tray on the left, which means you get one slot for the first Nano-SIM and another slot for either a second Nano-SIM or a microSD card. This arrangement forces you to choose between a second line and additional storage, There’s a 3.5mm audio socket on top, with a small IR emitter to keep it company. You can use this in conjunction with an included app to control a variety of devices. There’s also a standard Micro-USB port on the bottom which interestingly allows you not only to charge and sync the phone as usual, but also to use the Vibe X3 as a power bank to charge other devices.