Launch the UML290PMTool_v1.0.0.2.exe program.Insert the UML290 into a Windows PC and wait for it to be recognized by Windows.Follow these instructions to change the modem's preferred network setting. To lock the UML290 modem into either 3G or 4G modes, use the UML290 Pref Mode Tool available from the link below. This can result in difficulty making or maintaining connections in areas of marginal signal strength, modem 'lock-ups' when the 4G service is temporarily interrupted, or other undesirable device behavior. Verizon has acknowledged that this is a problem and is working on a fix.

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. Pantech's UML290 3G/4G/LTE USB modem has difficulty with the 'hand-off' between the Verizon Wireless 3G network and 4G networks. Locking Verizon / Pantech UML290 into 3G or 4G Mode FAQ ID # 224 - Locking Verizon / Pantech UML290 into 3G or 4G Mode

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