The specs seem to point to the usual 2G radio flip phone. Right or wrong these are on the way out and folk will be upset at the changes in coverage.
You should try the other carriers. I use Ting.com which is Tmobile, ATT or Cricket and if you dare, Sprint.
I see one last 237c at https://www.amazon.com/NET10-LG-237C/dp/B01ANG8YWG for under 50 which to me is high but not out of line as these are often sought after for reasons.
Me? I'd skip it and try other carriers.
I lost my LG 237c phone that did not need a signal booster at my location. So it took over a month to get a new 441g at reasonable price, but it needs a signal booster. Net10 says they do not have that survice. I assume that means I cannot buy a cheap booster to use because they need to be registered some how. so I was looking for a clip on booster antenna. No such thing exists that works.
Is there any thing I can do? maybe I should just try aluminum foil? or pay an absurd price for thet one I lost.