The LHGG CAT6 modem is the R11e-LTE6. It can combine B3+B7 and also two of the same band, e.g. B3+B3 or B7+B7. It does not support the B1+B3 combination which is common here in Ireland with the wide deployment of masts operating band 1 and 3. The list of the carrier combinations is in this document. This modem however has very poor performance on band 20 based on my experience and lacks band 28 that is also widely deployed in Ireland.
The Fibocom FM350 is based on the MediaTek T700 chipset, whereas the Fibocom f150 is based on the Qualcomm SDX55. Unfortunately the FM350 does not appear to work at all with MikroTik, at least not going by this post on the ISP Review forum. It's a pity as I really wish MikroTik would offer support for even any MediaTek based 5G m.2 modem that can be purchased separately, especially as MediaTek is able to sync with further away 5G carriers than Qualcomm.
I would avoid any eSIM specific modules as there is a risk these may not work with an external SIM card, unless it specifically mentions dual SIM (physical + eSIM) support. From a quick search, I've also found reports of users reporting the Dell modems being FCC locked such as here, which is where the modem is locked to specific device for FCC certification to supply the US market.
The Fibocom FM350 is based on the MediaTek T700 chipset, whereas the Fibocom f150 is based on the Qualcomm SDX55. Unfortunately the FM350 does not appear to work at all with MikroTik, at least not going by this post on the ISP Review forum. It's a pity as I really wish MikroTik would offer support for even any MediaTek based 5G m.2 modem that can be purchased separately, especially as MediaTek is able to sync with further away 5G carriers than Qualcomm.
I would avoid any eSIM specific modules as there is a risk these may not work with an external SIM card, unless it specifically mentions dual SIM (physical + eSIM) support. From a quick search, I've also found reports of users reporting the Dell modems being FCC locked such as here, which is where the modem is locked to specific device for FCC certification to supply the US market.