Re: Router.
https://ee.co.uk/help/help-new/broad...home-broadband
Buying and installing a new router for an EE line requires some technical knowledge and, probably, some troubleshooting experience, so either acquiring a (self-installing) new router from EE or switching provider and router seems, to me, the best solution - the first should cost nothing (if EE comply) and the second will, almost certainly, mean a new router, better service and money saved .....