Tip Of The Week #71: Lock Your Verizon UML290 or VL600 to 4G LTE Only

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Wednesday, 22 December 2010

tip of the week by has long been your source for tips, tricks, hacks and suggestions for getting the most out of your EVDO service, and each week we will be highlighting a particularly interesting or popular topic in the "Tip of the Week" feature. To suggest future Tips of the Week, post your suggestions in the EVDO Forums.



Lock Your Verizon UML290 or VL600 to 4G LTE or 3G EVDO Only

NOTE: if you are hoping to use your UML290 in a router in 3G mode, read Tip of the Week #72 instead for the appropriate fix.

Verizon's 3G/4G modems are having trouble with the "hand-off" between the 3G network and the 4G network. Simply put, users are finding that their modem works fine when locked to either 3G or 4G mode in a particular location, but when the modem is set to "auto" (i.e., when the modem is set to automatically connect to the fastest network available - 4G or 3G - this is the default setting on the modem), it has trouble making the switch between networks. Verizon has acknowledged that this is a problem and is working on a fix (read more about the current status of this issue at

For the time being, Verizon recommends changing your modem's settings from "global" (AKA "auto", where the modem will search for the best network to connect to) and instead lock it into LTE mode if you are in a 4G area or EVDO/3G mode if you are in a 3G-only area.

Below are the instructions to set your Verizon modem to 4G-only or 3G-only mode:

  1. Open VZAccess Manager with your card inserted, but do NOT connect to the internet.
  2. Hold Control + D on your keyboard
  3. You will be prompted to enter a password. Enter "diagvzw" (without the quotes)
  4. Select "settings" from the menu
  5. In the for "preferred operating mode" section, select "LTE Only" if you are in a 4G area or "HDR Only (EVDO)" if you are in a 3G area, as shown below. This is the only setting that should be changed! Then hit "OK".
vzam settings
click image for larger view

Your modem will now only connect to the network you selected. Just remember that you will need to manually change it if you travel to an area where you want to connect to the other network!

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Last Updated ( Monday, 03 January 2011 )
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