This is 70 odd quid from amazon has a 4g card slot. There are others you just link a USB cable from your phone like the second one:
https://www.amazon.co.uk/dp/B016ZWXYXG/ref=cm_sw_r_wa_apa_glt_fabc_573CZ6SAFZXSTD2G70YT
This is 24 odd pounds Check this out at Amazon TP-Link TL-MR3020 V3 Portable 3G/4G Wireless N Router https://www.amazon.co.uk/dp/B078GXZJHP/ref=cm_sw_r_tw_apa_glt_fabc_NP3DHYRQST1GNVKD41CB
So if I have a smart phone you plug it in and tether via USB. The phone phone while it's connected to the router.
I've actually done this (on a different router)
Edit :
Thats because they sell you 5g which few people would really need.
4g data sim card and basic 4g sim or 4g usb (using android or iPhone to tether) |