Hi, I wondered if anyone on here can help with this, in a nut shell I've got a boat with a 4G router in which I've put an EE sim card, if the 4g is good then obviously the WIFI is good, however it's now somewhere where the WIFI is crap, my question is if I buy a booster will it improve the strength of the incoming signal and improve speed etc, or will it just boost the existing crap signal to distant parts of the boat ,