I'll have to ask mum and see what she wants with the Network.

Rather excessive but my router is quite an expensive Draytek one. It has built in support for 2 SIMs with LTE. It can also take an external USB mobile modem. The device also allows 3 WANs simultaneously and allows you to set routing and priorities, eg. at the moment I have it set to use the SIM card and to fallover to ADSL.