You can buy the dongle or router separate from the SIM card, yes. Then get a PAYG data SIM. Depending on your budget a cheap 4g router may be better than a dongle...
Excellent, thank you, I figured that should be possible! The reason for going with a dongle is that it controls a bit how the internet is used, i.e. could only be used by the laptop we also give them?
You can buy the dongle or router separate from the SIM card, yes. Then get a PAYG data SIM. Depending on your budget a cheap 4g router may be better than a dongle...
https://www.amazon.co.uk/TL-MR6400-Unlocked-Configuration-Required-External/dp/B016ZWXYXG/ref=psdc_430579031_t2_B078GXZJHP