I have had a Novatel MiFi 4510L for almost 60 days and have spent over 7 hours and three phone calls with tech support to no avail.
If this device connects to a 3G network (such as when 4G service is not available) it will not switch back to 4G when it is available. There is no phone setting to "force" this device into 4G mode, and removing the battery and restrating the unit doesn't work. It gets permanently stuck in 3G mode!
So far I have exchanged this unit at the Verizon store, and also had 2 SIM cards replaced by store personnel. None of this fixes the issue. Of course, this has to be costing Verizon a lot of money, and it hugely inconvenient to me. Does anyone have a fix for this? all I want is to get what I am paying for... No one at Verizon seems to care a whole lot... about this (I was told by someone at my local store that this is not a popular product so they don't know anything about it).
Can anyone please help?