Linksys Wireless-G Router for ATT&T/Cingular 3G/UMTS Broadband WRT54G3G - Wireless router + 4-port switch - EN, Fast EN, 802.11b, 802.11g

This router will work with the Sierra AirCard 875 on the AT&T network.
It has a problem delivering full 3G speed however. I cannot get over
900Kb/sec even when parked 400 ft. from the tower. Plugged into the computer, I get 2.8Mb/sec speed, same location.

The problems people are having getting this router to work on an AirCard 875 is that they must set the router up *before* inserting the aircard.
The "APN" entries must be entered correctly for proper operation. Choose "Custom" for your entries. There are two entries that must be made correctly, one is "ISP.CINGULAR" if you were a Cingular customer, and the other is the logon username; "WEP@CINGULAR.COM." If these two settings are correct, save settings, unplug router, inset AirCard, re-power router and all will work correctly. The firmware revision number of the AirCard is of no consequence as I updated my firmware to the Australian 7.2Mb/sec version with no change in performance or connectivity...Read more

This is an excellent product. I live in an area where DSL or cable are unavailable. I have to use dial-up for internet access for the past 6 years until now when I have 3G signals from AT&T arround my house. I got an AirCard 881 from ATT and set-up my LAN with this router. Now, all my computers (2 desktops and 2 laptops) in my household are able to access internet at high speed. The download speed is comparable to that of DSL. The set-up is easy and straight forward, and only takes less than 5 minutes.

I use this router in an RV and at a mountain house were installing dsl is not cost effective. Nice to have mobile wifi when multiple clients require internet access. Set up via start up disk did not work but configuration via web interface was easy and feature rich. Recommend an external antenna for use with AirCard to improve cellular reception and backhaul speeds.