But my bet is that your dad is right. Cellular Internet is highly variable as to say "ping time" so a gamer might be really upset using it. To make matters worse, it can be good one time and minutes later, really slow.
I don't know what other ISP (Internet Service Provider) you can get but this is where many keep shopping or take up using a gaming laptop where they head out to a friends house or a place that has good connections.
Hi. I live in the countryside, on the outskirts of a nearby city in England and have never had good internet. We tried using a router but the plan was much too expensive and decided to switch to using personal hotspots (unlimited data, on my familiy's contracts) on our phones. We now have a phone dedicated entirely for the purpose of the router as it is connected to a NETGEAR relay thing (unsure of what exactly it is) so instead of connecting to the phone's hotspot, we are connecting to the WI-FI provided by the relayer. It is very inconsitent and my dad says it is because of the inconsistency at the mobile provider's end (Three), not ours. I wasn't sure, for this reason, if an ethernet cable running from the relayer to my pc would help in anyway to iron out some of the inconsistencies.