The T-Mobile Sonic 4G Mobile HotSpot, though fast enough for most Internet applications, wasn't the fastest mobile router in terms of data speed I've seen. In fact, in my testing around San Francisco, on average, it was actually slightly slower than the previous model, the T-Mobile 4G Mobile Hotspot ZTE MF61, which came out a while ago. Still, overall, it makes a very good investment.
First of all, it comes with a very strong battery that lasted up to 8 hours in our testing, which is about 2 hours more than what T-Mobile claims. A mobile router's battery life depends a lot on how much you use it on the go. The good thing about the Sonic 4G is the fact that it can go in and out of standby mode very quickly without any user interaction. While other mobile routers need to be "waken" by a press on the power button, the Sonic seems to wake when there are data requests. And the router can stay in standby mode for days on a full charge.… Read more