Ericsson recently used a whole lot of frequencies in the 15 GHz band to pack capacity into a wireless transmission in its lab in Krista, Sweden. The result: a whopping 5 Gbps connection and what Ericsson is calling a successful “5G” trial. 5 Gbps is definitely impressive, though Ericsson left out some key details that would indicate how useful such technology in the real world. The company didn’t say how much spectrum it used, what kind of device received the transmission or whether the connection was made under truly mobile conditions or to a fixed antenna. A lot of the technologies being proposed for 5G use massive antenna arrays to transmit over ultra-high-band spectrum that would normally be useless for mobile communications. The results are extremely high speeds, but not necessarily networks that could connect directly to smartphones, tablets or laptops in motion.