I don't remember the device. It's at home. I am at work. It resembles similar to M2, but the color of the logo is just black and white. It is a very old device for sure, and is not available for purchase anymore. LTE support is the primary reason to buy hap ac2. And JioFi worked out of the box. But, I learned about load balancing capabilities accidentally when my default settings didn't work on another day. Later, I found cheaper alternatives within Mikrotik for LTE support and / or for load balancing. Nothing wrong with hap ac2, though. It works great and provides good coverage on both floors on my little home. Now, I am planning to buy another Mikrotik product soon for work where I don't need high end product, but just need to support legacy 2.4ghz devices like Xiaomi security camera.
FYI Not that it matters, but EdgeRouter X does not do *full* duplex gigabit nat -- Re-visit the Switch in Edgerouter XThe reason EdgeRouter-X is the best Load Balancer is that it includes a lot of things which a many of Load Balancers can't do.
But without going in details, I would say one thing.
I don't get any companies network inside my house (So, No Jio/Airtel/Vodafone/Idea) and the other thing is that I have Airtel Landline which is any how I'm not going to disconnect. So I'll always have the backup.
Trust me, EdgeRouter-X should be the first option if you want to buy Load Balancer.
It does a lot of things but to say simply (the most attractive thing about it and non-geekish) is that it's Full Gigabit Router (1000Mbps).
The cheapest was Indiamart (I don't think it would be a risk as some resellers do offer a warranty, but it's your choice in the end.). The ones given on ubiquity website had only USGs when I asked them.