EE 4g Wi-Fi dongle - booster?
Discussion
You can buy bigger chunkier devices which work with a 4g SIM card. I presume these have a better antenna and therefore get a better signal. 15 seconds ebay search -
https://www.ebay.co.uk/itm/234770554368
https://www.ebay.co.uk/itm/234770554368
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