Download the Cellmapper app on your phone. Look for the signal for Band 28, if the RSRP is somewhere around -80 to -90, it's excellent, -100 to -110 not so good. -120 is unusable. This is assuming you are getting the 5G router since LTE B28 is under DNB 5G. When using pure 4G, U Mobile will prioritise their own frequency, Band 1,3,7,8.

If you are getting RSRP -80 then the DNB signal is very strong. Open a browser window and go to cellmapper.net, Menu>Provider - Filter the Telco to Yes, Signal to 4G LTE. For some reason, all DNB 5G towers are listed under Yes 4G.

You will see signal towers with numbers 3XXXXX and 7XXXXX. The ones starting with 7XXXXX are the DNB 5G masts. If you are getting -80 for B28, my guess is you have a 5G mast very near your house.

It's very rare because you are on 4G and UM will prioritise their own infrastructure. But it's obvious you have very strong DNB signal, so 5G should not be an issue for your location. If you go to the cell mapper website on your browser, you can click on the cell tower and they will show a highlighted area where real user data has been mapped, the data should also show you which tower the 5G is from, assuming there are multiple 5G towers in your vicinity.

1) It depends on the 5G Modem in your phone. I've been using the MC888S for a few days now, so far on the same UM SIM card, I find that speedtest perform very similar when compared to the Zyxel NR5103E and Huawei CPE Pro. The MC888S does however have a much weaker Wifi penetration in my own experience.

2) Not all results are the same. Our connection to the DNB infrastructure is only half the journey, which is the "last mile connection". The rest of it depends on the Telco's own infrastructure. Speedtest shows only the result between the user to the selected server. Different Telcos ping different servers on speedtest, you can try to select a neutral server and test them both again. I am constantly getting 600-700Mbps on Yes 5G compared to 400-500Mbps on UM. However on Yes5G, it takes 30 seconds to load Foodpanda, Twitter pictures never ever load and there is no way to connect to many games on PS5. The only reason for keeping Yes5G is because they work very well on torrents and I use 2.5TB a month on that.

The UM Band 1,3,7 is for you to fall back on when using 4G. To find towers for DNB 5G, look under Yes 4G LTE. They grouped all DNB towers under "YES LTE" on that website.

The SIM card you received from the eshop is a blank card. After UM receives confirmation from the courier your sim has been delivered, they will send you an email for activation. Otherwise you can go to the eshop website, log in and check if the sim is ready for activation. You will have to key in the last four digits of the SIM card to activate the card.