I can't understand which Mikrotik 4G/LTE products support attachment of external SMA antennas.
I need to put a modem under the roof with 2 outdoor antennas over the roof, attached via 5 m cables.

I've searched a bit both from google and this forum:
search.php?keywords=sma&fid%5B0%5D=3
I've seen some product and builds, but I'd like understanding just from the Specifications section on the product page, without spending a lot of times reading the forum and manuals just to understand if the support 2 antennas.

I've seen that wAP series support 2 antennas (u.FL according to product page), but confronting these pictures:
https://lh3.googleusercontent.com/pw/AC ... authuser=0
https://i.mt.lv/cdn/rb_images/1712_l.jpg

It seems I've to actually break the modem cover to attach external antennas, did I get it right?
What about warranty?

Take a look at LtAP-mini or LtAP ,with your choice of MT-LTE card, you just need 2x~5 to10cm u.fl -> SMA patch leads & a drill. Job done, then you can put your external antenna.
Else there are plenty of other offerings like a routerboard and again install your LTE card onto and do your own custom mounting.

LTE uses MIMO (normally 2x2).

The best recommendation is use a MIMO 2x2 antenna instead 2 SISO antennas.

Take look that mANT-LTE-5o have 2 SMA connectors and any LTE module have at least 2 U.FL connectors.

The best recommendation to use external antennas is LtAP series.

Regards.