Who watches football anymore?
I think the issue you are running into is the WR802N's repeater mode is a bridging mode, like a pass-through signal strength increaser, but doesn't do routing in that mode, or you haven't turned it on. I looked at the model: it's a USB-powered mini-router. I've used an older version but I doubt the firmware features have changed much. It does client w or w/o routing, AP w or w/o routing, and bridging repeater. N300 is a marketing term; the actual model is probably WR802N.
ANYWAY, the very simplest solution which is better, which will give you peak performace and no headaches, is another WR802N, or a cheaper thrift store router, and an ethernet cable between them.
Setup one in client mode, setup the other in normal AP mode. Make sure you have set a specific channel for your phone hotspot, it's in the advanced settings on your hotspot on your phone. Use channel 1, 6 or 11.
The client WR802N will connect easily to the hotspot phone, with just it's setup wizard.
Setup your second WR802N or other router - tonit's factory default, as a router, so you almost don't need to configure it. Tweak as necessary: SSID, password, and if you can, set the channel, instead of Auto, to be one of the unused of the 3: 1, 6, or 11.
There may be an option for a 40mhz wide channel, use 20mhz. 40mhz under 2.4ghz is almost cumpletely unnecessary: most phones/clients don't support it. If you did 40, make sure the router /2nd WR802N is not using the same channel that the phone hotspot is using. If using channel 1, then 6 & 11 are available, and so on.
The bandwidth in 20mhz is probably in excess of what your phone hotspot can churn out, from either the cell towers, your plan, or the phone's processing capacity.
Any thrift store these days has a capable router for a couple of bucks that will do what the WR802N will do, and the majority run off 12v. They may use a few more watts than the WR802N but that shouldn't matter.
What you need the WR802N you already own for, is it's client mode. You need it in client passthrough: where it does not do routing, acting instead as a straight wifi-to-wired ethernet adapter.