Sierra Wireless U305 3G Lightning USB Modem


Smartphones have it easy. They can have an internet plan and all is good. But what about laptops and other devices that don’t have such a luxury? Or what if you want to tether to a Wi-Fi network to not drain your entire smartphone battery?

There is a solution for that as well. Here is the Sierra Wireless U305. It is a 3G Lightning USB Modem which connects via USB to a laptop or the like to give it internet connection. It must be connected to a data plan and then it’s all set to go.

Product Highlights

  • Unlocked to AT&T, T-Mobile and Select Prepaid GSM Supported Carriers (Please call your network provider for further assistance to confirm its compatibility.)
  • Weighs 2.08 oz or 0.13 pounds
  • Fold-able USB Modem
  • Compatible with 3G

497 in stock

SKU: U305 Category:

Mobile internet is great. Or at least it is if you have a way to connect. It’s okay for smartphones, of course, as that is the point of them. But what if you have a laptop and don’t want to tether it and drain your smartphone battery in a couple of hours?

The Smart Way

If you do need to get online, and there’s no public wireless network available, don’t worry. With the Sierra Wireless 3G Lightning USB Modem, you can still connect to the cell network of your choice. Assuming that network is available, the 3G Lightning acts as a modem for non-connected devices with a standard USB port.

You can either take the SIM out of your phone and put it in the modem, or get a data-only SIM for any network. Like all the devices we supply, the 3G Lightning is unlocked from all networks, so the world is yours. While it was created for AT&T and was locked to it originally, we understood the need for freedom to use devices as the customer sees fit. Therefore we helped shorten the process for you and it is now fully unlocked to all GSM networks. It is therefore compatible with networks across the world, including Europe, Asia and Australia.

Looks and Build

The 3G Lightning modem is good and solid, but weighs just 1.6oz. The USB connector is able to pivot in all directions so, when in use,  it won’t interfere with other ports on your computer. This is a common complaint for laptop users with USB devices, so kudos to Sierra Wireless for thinking ahead.

The unit has blue LEDs which show both power and connectivity. No more firing up your browser to find out if you have a connection or not!

The 3G Lightning installs automatically on Windows computers, without any other steps to set up. On Macs, the driver is available direct from the Sierra Wireless website. Even then, the installation is a breeze and takes just a couple of minutes.


The Sierra Wireless gets the best out of any 3G network, no matter where you are in the world. Compatible with networks in over 160 countries, you should be able to get online wherever you are. Just buy a local SIM card for the best data deals, put it in the 3G Lightning and you’re off and running instantly.

Using the HSPA 7.2 3G standard, you’ll be getting great speed and a reliable connection at all times.


We’ve long been promised public wireless access everywhere, but it’s still a long way off. If you routinely find yourself in a wireless dead spot, a USB modem like the Sierra Wireless 3G Lightning is the ideal choice. Some airtime contracts, particularly if you have an iPhone, don’t allow tethering at all, or at least not without heavy penalty charges. Get around it by plugging in the 3G Lightning and knowing exactly where you are on cost.

The Sierra Wireless 3G modem is an excellent alternative to tethering, and it won’t kill your phone battery.

Weight0.13 lbs
Dimensions3.1 × 0.5 × 1.4 in


Carrier Branding



AT&T, Metro-PCs, Select Prepaid GSM Supported Carriers, T-Mobile

Model Number


MicroSD Card Slot

Up to 32 GB

Number of Devices


Return Policy

All of the items on the Mr Aberthon website are completely covered by our 14-day return policy.

If you choose to return your device, you will receive the full refund. Mr Aberthon does not charge any additional restocking or handling fees. In order to qualify for the return policy, the product ID number will have to match the number on the device that we sent out (to protect us against scammers and fraud) and the device will need to still be in mint condition.

Shipping Options

Mr Aberthon has three shipping options:

  • 4-5 day shipping (Free throughout the USA)
  • 2-3 business day shipping
  • Overnight shipping (for orders that are purchased before 4pm EST)

Please note that we will only enable overnight shipping if we have the ability at that moment to fulfill the overnight shipping.

Shipping to Canada

We are proud to offer shipping to Canada. Here are the costs:

  • 4-7 business days for 40$
  • 2-3 business days for 80$

Extra costs may occur for the customer due to duty and taxes.