Any suggestion for a LTE(GSM) hotspot with the following features?
1. AT&T or unlocked
2. runs on usb power without battery installed (would like to connect to car 12 volt power but don't want battery installed)
3. quick boot up
This is probably not helpful as it is hard to find but if you can find one a Huawei E8372h-511 looks good - It has ATT LTE bands and is a usb mifi stick so you can plug it straight into a car charger. There is no battery.
They call it a wingle for some reason. A wireless or wifi dongle I guess.
I have never used this store but they have it listed here for reference. Make sure you get the 511 model for the right bands www.store4g.com/huawei-e8372/