I have an iPhone with unlimited data on Vodafone and I want to share that connection with more devices in the home & home office environment. Like my office PC, printer, then playstation, home TV & other smartphones. There's a problem that the iPhone personal hotspot range is too restricted so I want to boost the range. Also the personal hotspot appears to require a restart to add a new device so I don't actually want devices to connect to the iPhone but connect to a 3rd party router that connects to the iPhone.
To resolve these issues and create a wireless network out of the phone hotspot do I need a modem router or just a router?
Like https://www.asus.com/uk/Networking/DSL-AC88U/ vs https://www.asus.com/uk/Networking/RT-AC86U/