Great product despite a slightly difficult set up
It took a little while to get it set up because the directions do not detail where you enter in all the settings and some of the settings they do not detail at all. However, once working, this is an amazing product. Great for travel and way faster than I had expected. Since it is unlocked, you can you use it with many different carriers, this is helpful when traveling abroad. It is small, lightweight, and portable. This is one of my favorite gadgets of the year.

This review is both for at&t and the 2372
I have a Verizon mifi 2200 that I've used for a year and it has saved me many times when traveling. But it's SLOW. With the 2372 and AT&T I get at a minimum 3 times the download speeds that Verizon provided. Sometimes 5 times the download speeds. I'm canceling my Verizon account and sticking with AT&T. We just got back from Yosemite National Park and they had AT&T in the lodges on my IPad 3g but the verizon mifi 2200 couldn't get a signal. AT&T has been everywhere that I need a signal. So with the 2372 my Laptop and ipad wifi are covered.

Works great with AT&T!
I have been using an AT&T USB Mercury Connect in combination with a CradlePoint CTR500 for about a year and a half now. This combination worked, but it wasn't really portable (not portable enough to use from my pocket anyway).

I purchased the MiFi 2372 a week ago and am very pleased (even surprised) with its performance. It connects to AT&T much faster than my old setup, and is able to pickup a usable signal in areas that the USB Mercury could not.
I am using a generic usb cigarette lighter charger with a micro-usb cable for use/charging in the car. I can pull the cord, throw the MiFi in my pocket or briefcase, and not miss a beat.

Note that I did have to set the APN name to isp.cingular before it would connect to AT&T, but this was the only modification I had to make.

One slight ding is that when you connect it to a computer, it goes into 'modem' mode and shuts down the wifi radio. I would have liked to have the option for it to charge from the usb connection, and continue to function like it does on a charger. It would also be nice if there were a display on the unit with signal strength and battery level, but it is easy enough to see that from the web status page.
I have not used it on battery power for more than an hour, so I can't speak for battery run-time.

If you are on AT&T, and paying for the 5gig data plan, this is a very solid choice. I routinely use the connection with my laptop, iPad, and an Ipod Touch.

Using your Novatel MiFi Router
First, it is indeed true that the Novatel 2372 GSM MiFi device will work on either the AT&T or T-Mobile GSM networks. What may not be obvious to everyone is the fact that T-Mobile's GSM network will only accommodate a 3G connection if the cellular device is capable of supporting transmission in the 1700/2100 MHz band. Since the Novatel 2372 MiFi device does not support transmission in this band combination, this results in the T-Mobile network only allowing a noticeably slower EDGE data connection. The AT&T network, however, supports a 3G connection in the 2100 MHz band (uplink and downlink).

I found this out the hard way since I had a T-Mobile service plan in effect when I purchased my Novatel 2372 MiFi router. I noticed very quickly that my data connections were always EDGE connections instead of 3G connections. Once I determined the reason for not being able to access a higher speed 3G connection on T-Mobile's network, I switched my service to AT&T's network. This raised another issue which is finding out the complexities involved in obtaining an AT&T data-only service plan, i.e., a service plan that does not entail a 2 year commitment.

Below are the details associated with obtaining reliable MiFi data service for a Novatel 2372 MiFi router.

* AT&T at one time offered, but no longer offers, a data-only service plan. In other words today a normal cell phone plan available from AT&T must include a voice service plan. However, they do offer a DataConnect plan which is designed to accommodate a USB Wireless modem device (Air Card), e.g., for use in a laptop computer only. Unless you specifically mention that you have such a GSM capable device and wish to obtain data service and no voice capabilities, the AT&T sales people will tell you no such data-only plan exists unless you can prove you are legally deaf.
* I was able to sign up for AT&T's DataConnect plan for about /month with a 5 GB usage limit. In my case I will most likely not exceed this limit, hence this plan is ideal for use with my MiFi router.
* Once you have purchased the appropriate AT&T service and received an AT&T SIM card, you must have knowledge of certain configuration details in order to render your MiFi router functional on the service providers network. Don't count on AT&T to have this information available. Even the AT&T higher level technical support people may not necessarily be familiar with what a MiFi router is and therefore unfamiliar with how to properly configure such a device on AT&T's network.

Here are the simple details required to configure your Novatel 2372 MiFi router for access to either AT&T or T-Mobile data services:

In the Novatel configuration setup for creating an Internet Profile, I discovered that your default profile must include the correct APN string and a valid Username and Password. Fortunately this kind of information is available on the Internet or obtainable from your cellular service provider.

For AT&T (HSPA, UMTS, EDGE and GPRS), the APN should be: WAP.CINGULAR
- Username can be your assigned mobile telephone number
- Password can be your assigned mobile telephone number

For T-Mobile (EDGE and GPRS), the APN should be: [...]
- Username can be blank
- Password can be blank

There appears to be some variations in acceptable entries, especially involving the Username and Password. In general, however, the APN entry must be recognized by the carrier matching the inserted SIM card.

Novatel Wireless MiFi 2372 Unlocked 3G Mobile Wi-Fi Hotspot GSM For North America (AT&T & T-Mobile)

Five Star Service From A Five Star Company
Quantum went out of there way to get me my MiFi before having to leave town. I would definitely do business with them again.
They are terrific to go out of there way to make sure that i got my product on time. They definitely earned five stars for the service
that they have given me.