Just use your phone
Ya for now I just use Mi6 as Mifi since its my old phone with some error but still have functional LTE modem.
I just dream if Mikrotik would build Mifi with specs mention before. Anyway ty for comment.
While I fully agree with what your saying here in general, don't dismiss the fact powering such a setup using batteries might be ... how shall I say... 'a challenge'
Personally I think most modern cell phones are quite well equipped to act as MIFI.
You could even use an older one and use it only for that purpose. A nice powerbank connected it and off we go...
Cant agree more. Right now I just use my phone as I mention up this comment, Mi6 with Snapdragon830, which is LTE v13 if I dont get wrong. But still for daily basis mobile online it seems I push the limit break of my phone, always be hotspot tethering mode to provide us Internet.
Thats why I dream for Mikrotik Mifi....
You essentially described
wAP R ac which has 2 ethernet ports, wifi and pcie slot (for LTE card of your choice).
However rest of your requirements is oddly specific and unlikely to happen.
e.g. if you really need the USB, just look at
hAP ac³ LTE6 kit. You can perhaps swap the LTE card for something better. It has all you need but has 3 extra ports. So what? Just don't use them. I never understood why some people "require" to have exact (low) amount of ports. When I need switch for 8 devices (which means 9 ports because there has to be also uplink) I wouldn't ask for 9 port switch. I wouldn't even bother with 10 or 12 port switches. Going with double (16 or 24) and futureproofing is the way.
For 2 ethernet only why important because its only for Mifi purpose, no need many ethernet ports because its for portable use, not a full home router that need many ethernets ports. I like the idea for WAP R AC that mentioned but for the dimension not a catch for this portable use, and no need to have POE thingy there. Else is OK but if can cpu can be upgrade version than IPQ-4018.
USB is a must I think, since it a portable Mifi we need it for additional things like additional storage for sharing wirelessly while working outside using mobile LTE internet, in Mikrotik way of handling network. I would use with more confident than just use regular Mifi products.
Ty for all comments.