You can use whatever sim on whatever way you like, a phone sim will work no problemo in a router as there is a law which stops them from controlling what device you use it in.
A SIM is a SIM it will work in a router, I have a VOXI SIM working in a Router at the moment..
Hope this helps..
My motto is never buy off the internet unless it’s urgent/no other way. Always ring sales or CS first and they will give you a better deal. Be kind to the rep, make small talk and make it known you want a good deal! The basics of social engineering really.I was just going to ask that