If your planning on buying a 5G Device and then moving on to Sweden you may wish to consider Sweden's 5G NR Bands as well, like the UK n28 and n78 Bands are used, but Sweden also use n40 which has also been allocated by PTS for 5G use.
Current PTS Allocated 5G Bands in Sweden are -
n28, n40, n78 and TBA Upper 5G Bands n258 and n257.
A safe bet for a Device to cover Sweden's Allocated Bands above together with Existing Networks that would probably be Re Farmed 4G Band for 5G use would look something like this -
n1, n3, n7, n8, n28, n20, n33, n38, n40, n78, n257, n258, n261
If your looking at the ZTE MC7010, its worth noting that the cheaper ones on eBay are actually Three Badged and Firmware versions, whilst I don't have any experience of the Three versions, but you may want to look into the possible 4/5G Bands of these Devices and do a Band comparison of other Branded MC7010 devices for example the Telenor Versions which may (or not) be more Band compatible with the Nordic Regions or look into Unbranded ZTE Versions..