I recently purchased the Spitz 4G LTE GL-X750. It works up to a point with 6mbps as my top speed. I can get higher speeds on my phone on the same service. What antenna can I attach to the router to mount outside and get higher download speeds? Do I need two antenna? Can someone link to one that has worked or will work?
Don’t forget that your x750 is only a Cat 4 or 6 device and your phone probably Cat 16+. Depending on your telco and the bands they use this would maybe explain some of the speed difference due to better band aggregation on your phone.