This is what I purchased:
https://www.amazon.co.uk/dp/B08CZYM51X
I'm very happy with it. I'm using it with a Réglo Mobile SIM.
In the UK (and in the past in France with UK SIMs), I use a Teltonika RUT955, but last time that I tried using a Réglo Mobile SIM in the RUT955, the SIM stopped working after a short time and, as the T&Cs potentially prohibited use in the RUT955, I put the SIM into an old phone to get it reactivated. That old phone is no longer functional, so I decided to invest in the
MiFi unit for use with the Réglo Mobile SIM, having heard that others had had no issue with such a configuration. I did briefly test the ZTE MF920 on receipt with a UK SIM, either RWG (EE network) or Smarty, I forget which. If I had not already had the RUT955 with its roof antenna, I would probably have paid the extra for a 5G unit for futureproofing.