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Troubleshoot common issues on your Sprint 3G/4G USB Modem 250U by Sierra Wireless

Last Updated: Nov 20, 2013

Performing the following steps can help you resolve some of the more common device issues that you may experience with your Sprint 3G/4G USB Modem 250U by Sierra Wireless.

  • Check and update device software
  • Update the device data profile
  • Check signal strength
  • Verify possible computer issues


Find and update your device software

Just like a computer, the software on your phone needs to be updated periodically to make sure you have all the latest fixes and enhancements to keep it running at optimal performance. Check your current version and perform any needed software updates.



Update the device data profile

If you are experiencing any data issues, we recommend performing a data profile update. This will refresh your data service parameters such as username and password and help clear out any memory issues that might be affecting your USB Modem.


Note: To perform the update, you must have Sprint SmartView open and your 250U USB Modem inserted in the computer in a Ready to Connect state, but do not connect to the Sprint network.


To update the data file in Sprint SmartView:

  1. Go to the Sprint SmartView menu
  2. Click Tools > Update Data Profile (IOTA)

If the above option is grayed out:

  1. In Sprint SmartView, click Tools > Settings > Hardware tab
  2. Click Modify button next to the device name
  3. Click Update Profile button


Ensure signal strength is sufficient

If you are only receiving 1-2 bars, it is very possible you will lose connection or occasionally not be able to connect. You need 2 or more bars for a good connection. Try using your 250U in a different location to gain increased signal strength.


If you are having issues connecting to 4G in a building or home, keep in mind that at this time, 4G USB devices are primarily capable of getting the best service near an exterior wall or outside. To potentially resolve in-building coverage issues, you may have to use the device in other locations within the building to see if your coverage or signal improves.



Check for computer issues

Sometimes your computer could be having an issue that prevents your 250U from working correctly. To check for this:

  1. Remove your 250U from your computer
  2. Reboot or restart your computer
  3. Once it comes back up, restart Sprint SmartView and reinsert your 250U

If you are still having issues, you should try inserting your 250U USB Modem in a different USB port on your computer.

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I've been using the Sierra Wireless 3G device for one month in two USB ports on my laptop.  Now, neither port works
Author: Jootsey Date: 2010-09-21