Does the mobile hotspot plan include unlimited LTE data usage?
Unlimited data 4G LTE

How many devices can it connect at the same time?

Wi-Fi sharing - Connect to 15 devices

What is the maximum download and upload speed?

Download up to 150 Mbps/ Upload 50 Mbps

We will recommend performing a speed test by Okla. https://www.speedtest.net/ on the devices that are connected to the hotspot.  This will show more accurate speeds based on the tower that the device is connected to.