To access the router's Web interface, you point a connected computer's browser to its default IP address, which is 192.168.1.1 (the default log-in password is the same as the default Wi-Fi password). Here you can also access the router's other features.
Similar to the MiFi 4620L, the Jetpack 4G LTE Mobile Hotspot 890L supports a slew of cellular technology bands, including CDMA (1xEV-DORev.A/Rev.0: 800/1900 MHz), 4G LTE (700 MHz), Quad Band GPRS/EDGE (850/900/1800/1900MHz), and Quad Band (HSPA+/UMTS 850/900/1900/2100 MHz). While I didn't test it, this means that when traveling internationally, you can either roam (and pay a lot) or possibly just swap out the SIM card and use a more affordable local service.
The router supports up to 10 Wi-Fi clients when it's connected to a 4G network; when connected to a 3G network, only five clients can access the Internet at the same time, with the rest being part of the Wi-Fi local network only. The router supports Wireless-N with up to 150Mbps data rate. In my trial it offered a range of up to 150 feet away; that's very good for a router of its size.
Apart from working as a mobile router, the 890L can also be used for text messaging. You'll need to use its Web interface for this. The Web interface also allows for changing its more advanced settings, such as port forwarding, MAC address blocking, VPN pass-through and so on.
For security, apart from the MAC filtering, the Jetpack 890L doesn't support Wi-Fi Protected Setup, a feature that quickly connects WPS-enabled clients to a Wi-Fi network, but it supports all variations of WEP, WPA, and WPA2 wireless encryption standards.
Data plans and performance
Like all 4G-capable mobile routers from Verizon I've seen, the Jetpack 4G LTE Mobile Hotspot 890L come with two data plans that cost $50 and $80 per month for the 5GB and 10GB data caps, respectively (additional data will cost another $10 per gigabyte).
This limited data caps mean that you won't be able to really enjoy the device's very fast data rate, since at full speed, you can burn through those numbers in less than couple of hours.
I tried the Jetpack 4G LTE Mobile Hotspot 890L around the San Francisco Bay Area and was able to get 4G coverage almost everywhere with very fast connection speeds. The only places that I found it connected with 3G were when I was on the freeway going from one city to another.
As with all cellular connections, the router's download and upload speeds varied rather dramatically from one place to another, but overall were comparatively fast. The 890L offered almost exactly the same data rate as that of the 4620L, averaging around 10Mbps for download and and 8Mbp for download and upload, respectively.
I noticed that the Jetpack 890L took a very short time to get up and running and it didn't even get warm, possibly thanks to its larger chassis, in long operation..
(Longer bars indicate better performance)
With great performance and excellent design, the Jetpack 4G LTE Mobile Hotspot 890L is another excellent mobile router for those who can afford its data plans.