I have a UML290 and I am on the fringe of the closest 4G cell tower. I'm looking for people that use an external antenna with their UML290 and how well their antenna performs for them, and what model is their antenna. Thanks in advance!
External Antenna's vary in size and power so you should purchase one that fits your needs. Most external 3G/4G antennas that have a matching plug will be compatible with your device, even if it does not specifically say so. The antenna that I use is fairly small, lightweight and unpowered which works well for me. If you need better reception and do not need your antenna to be mobile then the Wilson Electronic boosters are a good solution for home or car installations.