Netgear LB2120 Product Details
The Netgear LTE Modem LB2120 gives you a simple, fail-safe connectivity solution for your devices or services, avoiding disruptions in broadband when your fixed wire line goes down. Simply connect your existing wire line broadband connection to this modem to provide an automatic 4G LTE or 3G broadband backup connection. This NETGEAR 4G LTE Modem has 2x Ethernet ports—one for WAN and one for LAN. It is also compact, convenient, and simple to setup.
Netgear LB2120 Speeds & Connections
Using the Netgear LB2120 4G LTE Modem for broadband connections allows wired internet at speeds up to 150Mbps for downloads and up to 50Mbps for uploads. Unlike other mobile connectivity options, the Netgear 4G LTE Modem can be easily installed in a matter of minutes, and is ideal for a wide range of environments including rural areas, outdoors, and locations where wireline option is not readily available.
Netgear LB2120 Compatibility
The LB2120 LTE modem works with a varitey of cell phone carriers including AT&T, T-Mobile, & Verizon services (limited to some areas). As always, please call your provider before ordering to ensure this will be a good fit for your phone plan.
In addition to using this for on the go connections, this device can also be used as your primary internet access device if you live in an area that does not provide DSL or Cable services.
Netgear LB2120 Additional Features
- Connects directly to a computer or wireless router to give you high-speed DSL Internet access
- Secure and super-fast 4G LTE connectivity with 3G fallback
- Compatible with T-Mobile, AT&T & Limited Verizon Services
- Get up to 150 Mbps download and 50 Mbps upload speeds
- Gigabit Ethernet port for connection pass-through
- Two connectors available to connect optional 4G/3G antennas for better signal reception.
What’s Included:
- Netgear LB2120 Wireless Router
- Ethernet Cable
- Power Supply Cable
- Online Installation Manual
Compatible Bands:
LTE Category 4: Bands 2, 4, 5, and 12. 3G UMTS: Bands 2 and 5.
LTE Category 4: Bands 2, 4, 5, and 12. 3G UMTS: Bands 2 and 5.
Compatible Providers:
AT&T, T-Mobile. Limited Verizon service
AT&T, T-Mobile. Limited Verizon service
# of Ethernet Ports:
1 Gigabit WAN
1 Gigabit WAN
1 Gigabit LAN
Ideal For:
Primary Internet Connection & Portable Internet
Primary Internet Connection, Mobile Internet
& Backup Internet Connection if Primary Fails
Powered By:
AC Power Adapter
AC Power Adapter
Home Use:
Rural Areas with Poor Service
Vacation Homes
Business Travel
Rural Areas with Poor Service
Vacation Homes
Business Travel
Belkin Routers
TP-Link Routers
ASUS Routers
Cisco Routers
Arris Routers
uofa314 –
Works Great! If you have AT&T’s unlimited plus plan, this can be added to that plan for $20/month and you will have unlimited internet at home. I connected this to a Linksys wireless router and it worked without changing any settings. The unlimited plan says that speeds may be reduced after 22gb. I have personally never seen this. I live out in the sticks, so the towers I’m using are never congested. That’s probably why my data has never been slowed to this point.
I ordered this modem on Amazon and an unused ATT micro SIM card on ebay. When I called ATT, the 1st person told me I would have to go to a store to activate it. I hung up and called right back. The 2nd person activated it with no problem over the phone. It shows up in my account as an “unknown device”.
I get download speeds from 20 – 60 Mbps with this modem. The only other home internet option where I live is Satellite which is terrible. This modem on the ATT unlimited plan is great. We can watch multiple Netflix or Amazon video streams at once with no problems.
Update August 2018: Over a year later and this device is still working great. We still use this as our home internet and have never experienced any slowdowns. The Unlimited Plus Plan is no longer available, but people that already have it can keep it. The new unlimited plans don’t allow these stand alone modems or hotspots with unlimited data.
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C&T –
This is definitely worth the money. We put my wife’s T-Mobile sim in and within a minute it locked on to Band 12. I tried a Cricket sim and because it’s basically at&t it locked on and we had LTE. What the product doesn’t tell you is that it picks up Verizon LTE also. I tried our VZW sim just to see, and it picked up LTE Band 4!
Steven D Hicks –
ALL VERIZON CUSTOMERS READ.
This will work with Verizon. Despite what they tell you at the store or online. You’ll need a device to activate the sim card on that you don’t plan on using. This is what I did.
1. Went to Verizon bought a new Sim Card.
2. Activated the SIM card with an old $10 verzion compatible jetpack device.
3. Took the sim out of the jetpack device, and into the Netgear modem.
4. Viola. It works.
John Willis –
Can’t stress this enough (BE Sure to update the APN with the Google code or it will not work! Four digits Unique to Google) Confirmed as working on Google Fi using the same SIM card I use in my Phone in a micro SIM adapter in the LB2120. Its not rocket science, but the router does require [ Settings ] setup, by default it will not connect to Mobile LTE broadband, it is configured for (manual) connect, it will wait for you to login and press a button. Also by default the LB2120 will accept whatever APN it sees from the carrier. In my case this was [ fast.t-mobile.com ] and it would connect, get an IP address from the carrier and drop off a few seconds later. If you switched the LB2120 to automatic connect it would just connect, then disconnect, then connect and disconnect over and over. Google Fi has a two-step procedure for 1.activating a data sim and 2. configuring a “specific” APN value to get access on T-Mobile. I was about to send the Netgear LB2120 back as not-working on arrival.. but then found the crucial information. Ignore the APN it “finds”, create a new APN by pressing [Add] and type the Google Fi setup code into (not) the Profile name field, but the second [ APN ] value field.. (the value is on the Google Fi setup page.. go read it) and it connects right up.. Mobile broadband is fairly speedy. – The auto-failover from Wired Ethernet to Mobile Broadband is great, if the SIM has a phone plan as well, it will send and receive SMS text alerts for several events.. most important [Failover to Mobile LTE] and [Failback from Mobile LTE to Ethernet]. It also lets you set the rule for determining that the Ethernet connection is down.. it pings a host on the Internet.. your choice. (and) for the record my RSRP is -110 and current radio band is LTE B4 .. pretty bad.. I’m out in the sticks by an airport, but also darned surprising the connection is so stable. Bonus Tip – if you have trouble with SMS sending or receiving, reboot your phone Android 7.0+ Messenger tends to silently lock up, after reboot the “first” SMS received will open a flood gate of catchup messages. Deleting the Cache or App storage will do nothing, restarting the App will do nothing. Only a complete power down, power up and then start the Messenger app works.. its a flaky app.
Customer –
This was intended to replace the deteriorating Centurylink DSL I’ve been stuck with since Qwest days. The biggest problem I had was finding a service provider. Sprint didn’t want to have anything to do with it, Verizon didn’t have it in the “White-list” database but were willing to add it, providing I was willing to pay $$$$ for a few gigs per month. “No unlimited data plan for YOU”! I passed on that and went over to the AT&T store a couple of blocks over. They at least had it in their database but I spent at least an hour and a half with the one clerk trying to get a contract set up, they had a problem with my DirecTV account that was apparently an act of God to get resolved. 10 gigs/month for $60 was the best they could do. No associated cell phone on any of these carriers, so no way to add it to an already existing device. Once I had an activated SIM, I connected it to the home network, changed the IP to match the system, changed the password on the device and it was up and running. Took less time to do than to write it. Better transfer rate than the DSL I’d previously been stuck with, it’s running pretty slow compared with what some have written about. Seems to be fussy about what port on the switch it’s plugged into, have switched ports, it works for a bit, then the Ethernet section goes to sleep. Switch ports again and it works for a half-day or so and goes to sleep. Last port I’ve put it in seems to be the solution, it’s been up for three days straight now. Getting between one and three bars on the top panel’s lights. I might look into an external antenna if I can find one inexpensive enough.
Apparently “unlimited data” for these carriers is ONLY for phones, not stand-alone data devices, at least in these parts. Get your potential carrier lined up before you invest.
Barry –
I got the unit because it uses an Ethernet connection instead of WiFi. As advertised (works with AT&T and other GSM carriers), I got it to work with Cricket, the carrier that uses the AT&T network, but charges about half the price. The trick is knowing the APN parameters to use (which Cricket tech support would or could not help me with). I’ll save you the research. The APN for Cricket is as follows:
Name: Internet/MMS 2
APN: ndo
Authentication: None
PDP: IPV4
PDP Roaming: None
Anonymous –
This is probably not what you expect. It caught me by surprise. The day came that I got tired of having to reboot my cable modem because my internet cut out. I decided to research a possible second ISP. I decided to add a line to my cell service (I had 3 for $90 and went to 4 for $100) for a $10 difference. I did my research and came up with this gem.I quickly configured it as soon as it arrived.I saw tha everytime I unplugged the cable modem it kicked in and took over quickly. I spent the next couple of days slowly segregating my network and moving all my devices to just this devices ISP (yes I removed the cable modem). It has been over a week and my whole house (multiple TVs, multiple tablets, and multiple PCs) run off of it. I have a switch coming off of it that splits off to my wifi and my VoiP phone service. This little gem is wonderful. I love it and appreciate it so much I actually followed up by buying an extended warranty. While the price might seem steep for a device so small, I got rid of my cable ISP and it will be saving me $70 a month (Yes it is paid off in 2 months).
kour8 –
I use this at a summer location where there is poor DSL connectivity. I’m using it with an external Yagi antenna, getting 5 bars of signal and symmetric speeds of 40-50 Mbps which is the most the local tower can support. I have it in bridge mode and only use it as a 4G modem, having a separate router/WiFi device. Setup was very easy, it’s reliable and fast.