I've been using this for about a month as my main internet connection. I've mostly used the Franklin R850 it came with and the signal strength is pretty low but I get about 8Mbps down 2Mbps up most of the time. It also supports IPv6, which is useful for me. I used it for a little while in a Mofi 4500 SIM4 V2 and it seemed to work except I didn't get IPv6 addresses and I was not sure if Sprint would cancel the line for using an unapproved device, so I put it back in the R850. The Mofi was definitely faster and had better signal strength and since it has external antennas I could probably increase that significantly with some better antennas.